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PRELIMINARY
45
Features
* * * * * * * * * EMI filtering Choice of 500W or 750W modules 96% Efficiency Autoranging 115/230Vac input Microprocessor controlled Inrush current limiting Mini sized package Power fail signal Module enable
Data Sheet
FARM
TM
Filter/ Autoranging Rectifier Module Up to 1000 Watts
Shown actual size: 2.28 x 2.2 x 0.5 in 57,9 x 55,9 x 12,7 mm
Product Highlights
The FARM (Filter/Autoranging Rectifier Module) is an AC front-end module which provides EMI filtering, autoranging line rectification and inrush current limiting. The FARM is available in either 500/750W or 750/1000W models in a mini sized package measuring only 2.28" x 2.2" x 0.5". The FARM interfaces directly with worldwide AC mains and may be used with Vicor 1st or 2nd Generation 300V input DC-DC converters to realize an autoranging, high density, low profile switching power supply. The FARM includes a microcontroller that continuously monitors the AC line to control bridge/doubler operation. The user need only provide external capacitance to satisfy system hold-up requirements. Vicor 2nd Generation packaging technology offers flexible mounting options for various manufacturing processes. The FARM may be installed as a conventional leaded device for on-board applications, in-board for low profile, height restricted applications, socketed or surface mounted with optional ModuMate interconnect products.
Absolute Maximum Rating
Parameter L to N voltage L to N voltage +Out to -Out voltage B OK to -Out voltage EN to -Out voltage Mounting torque Pin soldering temperature Pin soldering temperature Rating 264 280 400 16 16 4-6(0.45-0.68) 500 (260) 750 (390) Unit Vac Vac Vdc Vdc Vdc in-lbs (N-m) F (C) F (C) Notes Continuous 100ms
6 each, 4-40 screw <5 sec; wave solder <7 sec; hand solder
Thermal Resistance and Capacity
Parameter Baseplate to sink; flat, greased surface Baseplate to sink; with thermal pad (P/N 20264) Baseplate to ambient Baseplate to ambient; 1000 LFM Min Typ 0.16 0.14 8.0 1.9 Max Unit C/Watt C/Watt C/Watt C/Watt
Part Numbering
FARM
Product
1
Type 1 = 500/750W 2 = 750/1000W
C
Product Grade C = -20C to +100C T = -40C to +100C
1
Pin Style* 1= Short Pin 2= Long Pin S= Short ModuMate N= Long ModuMate
1
Baseplate 1 = Slotted 2 = Threaded 3 = Thru-hole
*Pin styles S & N are compatible with the ModuMate interconnect system for socketing and surface mounting.
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
FARM, Filter/Autoranging Rectifier Module
Rev. 4.7
Page 1 of 12
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PRELIMINARY
Electrical Characteristics
Electrical characteristics apply over the full operating range of input voltage, output power and baseplate temperature, unless otherwise specified. All temperatures refer to the operating temperature at the center of the baseplate. Specifications apply for AC mains having up to 5% total harmonic distortion.
MODULE INPUT SPECIFICATIONS (FARM1xxx, FARM2xxx)
Parameter Operating input voltage Operating input voltage Input undervoltage AC line frequency AC line frequency Power factor Inrush current FARM1xxx FARM2xxx Input surge withstand 2kV -50 s common mode 1kV -50 s differential mode 47 47 0.60 Min 90 180 Typ Max 132 264 90 63 880 0.65 30 60 Amps Amps Unit Vac Vac Vac Hz Hz Notes Autoranging (doubler mode) Autoranging (bridge mode) No damage C-Grade T-Grade Typical line 264Vac peak line, cold start 264Vac peak line, cold start EN61000-4-5
MODULE OUTPUT SPECIFICATIONS FARM1xxx
Parameter Output power Output power Efficiency, 120Vac Efficiency, 240Vac Output voltage Hold-up capacitance Min 0 0 94 94 250 96 96 370 1,800 Typ Max 500 750 Min 0 0 94 94 250 96 96 370 3,300
FARM2xxx
Typ Max 750 1000 Unit Watts Watts % % Vdc F 90-264Vac Notes 90-132Vac 180-264Vac
SAFETY SPECIFICATIONS (FARM1xxx, FARM2xxx)
Parameter Safety approvals Isolation voltage (in to out) Isolation voltage (I/O to baseplate) Leakage current None 1500 1.2 Volts, rms mA 264Vac Min Typ Max Unit Notes UL 1950, CSA 22.2 No. 950, TUV, VDE, EN60950, CE Marked Isolation provided by DC-DC converter(s)
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FARM, Filter/Autoranging Rectifier Module
Rev. 4.7
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PRELIMINARY
Electrical Characteristics (continued)
MODULE CONTROL SPECIFICATIONS
Parameter AC Bus OK (B OK) Low state resistance Low state current High state voltage B OK true threshold B OK false threshold Module Enable (EN) Low state resistance Low state current High state voltage Enable threshold Disable threshold AC Bus OK - Module Enable, differential error* 14.8 235 185 15 15.0 240 190 17 195 20 15 50 15.2 mA Vdc Vdc Vdc Vdc 150K internal pull up to 15Vdc (see Fig. 10) Output bus voltage Output bus voltage AC Bus OK and Module Enable thresholds track To negative output - Converters disabled 14.8 235 200 15.0 240 205 15 50 15.2 245 210 mA Vdc Vdc Vdc To negative output - Bus normal Bus normal Bus abnormal, 27K internal pull up to 15Vdc (see Fig.11) Output Bus voltage Output Bus voltage Min Typ Max Unit Notes
* Tracking error between BUS OK and Enable thresholds
MODULE GENERAL SPECIFICATIONS
Parameter MTBF Baseplate material Cover Pin Material Weight Size Storage Temperature (C, T-Grade) (T-Grade) -40 -20 -40 3.1(88) 2.28 x 2.2 x 0.5 57,9 x 55,9 x 12,7 +125 +100 +100 Ounces (grams) Inches (mm) C C C Baseplate Baseplate Min Typ >1,000,000 Max Unit Hours Notes 25C, Ground Benign Aluminum Polyetherimide Copper, Tin/lead solder dipped
Operating Temperature (C-Grade)
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FARM, Filter/Autoranging Rectifier Module
Rev. 4.7
Page 3 of 12
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PRELIMINARY
Operating Characteristics
Vdc output Vdc output
Strap Engaged
Enable B OK
Enable B OK
Figure 1--Start-up at 120Vac input
Figure 2--Start-up at 240Vac input
Vdc output
Vdc output
Iac input @2A / mV
Iac input @2A / mV
Enable Enable B OK B OK
Figure 3--Power down, from 120Vac
Figure 4--Power down, from 240Vac
Vdc output
Enable
B OK
Figure 5--Output overvoltage protection 240Vac range
Figure 6--Typical Conducted Emissions
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
FARM, Filter/Autoranging Rectifier Module
Rev. 4.7
Page 4 of 12
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PRELIMINARY
Application Note
The Filtered, Autoranging Rectifier Module (FARM) provides an effective solution for the AC front end of a power supply built with Vicor DC-DC converters. This high performance power system building block satisfies a broad spectrum of requirements and agency standards. In addition to providing transient/surge immunity and EMI filtering, the FARM contains all of the power switching and control circuitry necessary for autoranging rectification, inrush current limiting, and overvoltage protection. This module also provides converter enable and status functions for orderly power up/down control or sequencing. To complete the AC front end configuration, the user only needs to add hold-up capacitors, and a few discrete components. Functional Description Power-Up Sequence. (see Fig. 8): 1.1 Upon application of input power, the output bus capacitors begin to charge. The thermistor limits the charge current, and the exponential time constant is determined by the hold-up capacitor value and the thermistor cold resistance. The slope (dv/dt) of the capacitor voltage versus time approaches zero as the capacitors become charged to the peak of the AC line voltage. The switch that bypasses the inrush limiting PTC (positive temperature coefficient) thermistor is open when power is applied, as is the switch that engages the strap for voltage doubling. (see Fig. 7). In addition, the converter modules are disabled via the Enable (EN) line, and Bus-OK (BOK) is high. 2.1 If the bus voltage is less than 200V as the slope nears zero, the voltage doubler is activated, and the bus voltage climbs exponentially to twice the peak line voltage. If the bus voltage is greater than 200V, the doubler is not activated. 3.1 If the bus voltage is greater than 235V as the slope approaches zero, the inrush limiting thermistor is bypassed. Below 235V, it is not bypassed. 4.1 The converters are enabled 50 milliseconds after the thermistor bypass switch is closed. 5.1 Bus-OK is asserted after an additional 50 millisecond delay to allow the converter outputs to settle within specification. Power-Down Sequence. (see Fig. 8) When input power is turned off or fails, the following sequence occurs as the bus voltage decays: 1.2 Bus-OK is deasserted when the bus voltage falls below 210Vdc. 2.2 The converters are disabled when the bus voltage falls below 190Vdc. If power is reapplied after the converters are disabled, the entire power-up sequence is repeated. If a momentary power interruption occurs and power is reestablished before the bus reaches the disable threshold, the power-up sequence is not repeated, i.e., the power conversion system "rides through" the momentary interruption.
+Out
90-132V AC Line
Power Up
Power Down
PTC Thermistor L
Strap Strap
Output Bus (Vdc) Strap PTC Thermistor Bypass
400 300 200 100 0
1.1
2.1
-Out N EN Microcontroller BOK
3.1 4.1 5.1 2.2 1.2
Converter Enable Bus OK
50ms 50ms
Figure 7--Functional block diagram: autoranging rectifier
Figure 8--Timing diagram: power up/down sequence
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
FARM, Filter/Autoranging Rectifier Module
Rev. 4.7
Page 5 of 12
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PRELIMINARY
Application Note (continued) Off-Line Power Supply Configuration
The FARM maintains the DC output bus voltage between 250 and 370Vdc over the entire input voltage range, which is compatible with Vicor 2nd Generation, 300V input converters as well as 1st Generation VI-26x and VI-J6x DC-DC converters. The FARM automatically switches to the proper bridge or doubler mode depending on the input voltage, eliminating the possibility of damage due to improper line connection. The FARM1xxx is rated at 500W in the low range (90-132Vac input), and 750W in the high range (180-264Vac input). The FARM2xxx is rated for 750W and 1000W for the low and high input ranges respectively. Either of these modules can serve as the AC front end for any number and combination of compatible converters as long as the maximum power rating is not exceeded. Strap (ST) Pin. In addition to input and output power pin connections, it is necessary to connect the Strap pin to the center junction of the series hold-up capacitors (C1, C2, see Fig. 9) for proper (autoranging) operation. Gas tubes V1 and V2 provide capacitor protection. The bleeder resistors (R1, R2, see Fig. 9) discharge the hold-up capacitors when power is switched off. Capacitors C7 and C8 are recommended if the holdup capacitors are located more than 3 inches from the FARM output pins. Enable (EN) Pin. (see Fig. 10) The Enable pin must be connected to the PC or Gate-In pin of all converter modules to disable the converters during power-up. Otherwise, the converters would attempt to start while the hold-up capacitors were being charged through an unbypassed current limiting thermistor, preventing the bus voltage from reaching the thermistor bypass threshold, thus disabling the power supply. The Enable output (the drain of an N channel MOSFET) is internally pulled up to 15V through a 150k resistor. A signal diode should be placed close to and in series with the PC or (Gate-In) pin of each converter to eliminate the possibility of control interference between converters. The Enable pin switches to the high state (15V) with respect to the negative output power pin to turn on the converters after the power-up inrush is over. The Enable function also provides input overvoltage protection for the converters by turning off the converters if the DC bus voltage exceeds 400Vdc. The thermistor bypass switch opens if this condition occurs, placing the thermistor in series with the input voltage, which reduces the bus voltage to a safe level while limiting input current in case the varistors conduct. The thermistor bypass switch also opens if a fault or overload reduces the bus voltage to less than 180Vdc.
Holdup Box (HUB)
820F HUB820-S 2200F HUB2200-S 2700F HUB2700-S 3300F HUB3300-S 1200F HUB1200-S 1800F HUB1800-S
C3 F1 +In C10 PC (Gate In) Vicor DC-DC Converter PR (Gate Out) -In R2 R3 C2
N
N EMI GND
+
B OK
R1 C7* V1
C1
Z1
C9
Filter/Autoranging ST Rectifier Module EN N/C
L -
FARM
C8* V2
D3
L
PE
Part C1,2 C3-6 R1,2 V1,2 F1,2 D1,2 C7,8 * Z1 C9 D3,D4 C10,C11 R3 Description Holdup capacitors 4700pF 150k, 0.5W 200V MOV 3A, PC Tron Diode Film Cap., 0.8f MOV 0.47F 1N5817 .001F 500 Vicor Part Number see text 01000 00127-1503 20461-200 02178 00670 03040 26108
C4 D1 C5 F2 +In C11 D2 D4 PR (Gate Out) -In PC (Gate In) Vicor DC-DC Converter
Sizing PCB traces: All traces shown in bold carry significant current and should be sized accordingly. FARM1-xxx N/ST/L 10A rms at 90Vac and 500W 4A DC at 190Vdc and 750W +/- In FARM2-xxx N/ST/L 20A rms at 90Vac and 750W +/- In 8A DC at 190Vdc and 1000W Required if C1 & C2 are located more than 3 inches from output of FARM.
*
C6
To additional modules
Figure 9--Converter connections
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PRELIMINARY
Application Note (continued)
Bus-OK (BOK) Pin. (see Fig. 11) The Bus-OK pin is intended to provide early-warning power fail information and is also referenced to the negative output pin.
Caution: There is no input to output isolation in the FARM. It is necessary to monitor Bus-OK via an optoisolator if it is to be used on the secondary (output) side of the converters. A line isolation transformation should be used when performing scope measurements. Scope probes should never be applied simultaneously to the input and output as this will destroy the unit.
N
15Vdc
+ B OK
150k
+In PC (Gate In)
EMI GND
ST N/C
Microcontroller
Vicor DC-DC Converter
PR (Gate Out) -In
EN -
L
Figure 10--Enable (EN) function
Filter. (see Fig. 12) An integral input filter consists of a common mode choke and Y rated capacitors (line-ground) plus two X rated capacitors (line-line). This filter configuration provides common mode and differential mode insertion loss in the frequency range between 100kHz and 30MHz as illustrated in Figure 6.
+In PC (Gate In)
Secondary referenced
N
15 Vdc
+ B OK ST EN
Microcontroller
+5 Vdc
EMI GND
27k
Vicor DC-DC Converter
PR (Gate Out) -In
N/C L
-
Optocoupler DI pkg. 26106 Optocoupler SM pkg. 26109
Figure 11--Bus OK (BOK) isolated power status indicator
Hold-up Capacitors. Hold-up capacitor values should be determined according to output bus voltage ripple, power fail hold-up time, and ride-through time (see Fig. 13). Many applications require the power supply to maintain output regulation during a momentary power failure of specified duration, i.e., the converters must hold-up or ride through such an event while maintaining undisturbed output voltage regulation. Similarly, many of these same systems require notification of an impending power failure in order to allow time to perform an orderly shutdown. The energy stored on a capacitor which has been charged to voltage V is:
Where:
330H
= 1/2(CV2) = stored energy
C = capacitance V = voltage across the capacitor
(1)
N
L1
+
4.7nF .47F .099F
EMI GND
B OK ST EN
N/C
4.7nF
Energy is given up by the capacitors as they are discharged by the converters. The energy expended (the power-time product) is:
L
-
= Pt = C(V12-V22) / 2
Where:
(2)
Figure 12--Internal filter
P = operating power t = discharge interval V1 = capacitor voltage at the beginning of t V2 = capacitor voltage at the end of t
Rearranging Equation 2 to solve for the required capacitance: C = 2Pt / (V12-V22) (3)
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FARM, Filter/Autoranging Rectifier Module
Rev. 4.7
Page 7 of 12
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PRELIMINARY
Application Note (continued)
Hold-up Time Ripple (V p-p) - Power Fail Warning
40
254V 205V 185V
35
Power Fail Warning (ms)
1300F 30 1100F 25 20 15 10 5 0 250
1600F 820F
2200F (FARM2XXX)
Ride-Thru Time
* 680F
(FARM1XXX)
Power Fail
B OK
Converter Shutdown
Figure 13--Hold-up time The power fail warning time (t) is defined as the interval between B OK and converter shutdown (EN) as illustrated in Fig. 13. The Bus-OK and Enable thresholds are 205V and 185V, respectively. A simplified relationship between hold-up time, operating power, and bus capacitance is obtained by inserting these constants: C = 2Pt / (2052 - 1852) C = 2Pt / (7,800)
*
500
*
750 1000
Operating Power (W)
Figure 14--Hold-up time vs. operating power and total bus capacitance, series combination of C1, C2 (see Fig. 9)
100
Ride-through Time (ms)
It should be noted that the series combination (C1, C2, see Fig. 9) requires each capacitor to be twice the calculated value, but the required voltage rating of each capacitor is reduced to 200V. Allowable ripple voltage on the bus (or ripple current in the capacitors) may define the capacitance requirement. Consideration should be given to converter ripple rejection and resulting output ripple voltage. The ripple rejection (R) of Vicor converters is specified as a function of the input/output voltage ratio: R = 30 + 20log(Vin / Vout) (4)
90 80 70 60 50 40 30 20 10 0 250
Total capacitance 820F
90Vac
115Vac
500
750
1000
Operating Power (W)
P-P Ripple Volts (V)
For example, a converter whose output is 15V and nominal input is 300V will provide 56dB ripple rejection, i.e., 10V p-p of input ripple will produce 15mV p-p of output ripple (see Fig. 17). Equation 3 is again used to determine the required capacitance. In this case, V1 and V2 are the instantaneous values of bus voltage at the peaks and valleys (see Fig. 13) of the ripple, respectively. The capacitors must hold up the bus voltage for the time interval (t) between peaks of the rectified line as given by: t = ( - ) / 2f Where: f = line frequency = rectifier conduction angle (5)
Figure 15--Ride-through time vs. operating power
30
25
* *
20
15
10
5 1100F 820F 1600F 1300F 500
The approximate conduction angle is given by: = Cos-1 (6)
0 250
680F * 2200F 750
(FARM1XXX) (FARM2XXX)
1000
(V2/V1)
Operating Power (W)
Figure 16--Ripple voltage vs. operating power and bus capacitance, series combination of C1, C2 (see Fig. 9)
FARM, Filter/Autoranging Rectifier Module Rev. 4.7 Page 8 of 12
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PRELIMINARY
Application Note (continued)
80 75
Ripple Rejection (dB)
Determining Ride-through Time. Figure 15 illustrates ridethrough time as a function of line voltage and output power, and shows that at a nominal line of 90Vac, ride-through would be 68 ms. Ride-through time is a function of line voltage. Determining Ripple Voltage on the Hold-up Capacitors. Figure 16 is used to determine ripple voltage as a function of operating power and bus capacitance, and shows that the ripple voltage across the hold-up capacitors will be 12V p-p. Determining the Ripple on the Output of the DC-DC Converter. Figure 17 is used to determine the ripple rejection of the DC-DC converter and indicates a ripple rejection of approximately 60 dB for a 12V output. Since the ripple on the bus voltage is 12Vac and the ripple rejection of the converter is 60 dB, the output ripple of the converter due to ripple on its input (primarily 120 Hz) will be 12mV p-p. Note that 2nd Generation converters have greater ripple rejection then either VI-200s or VI-J00s. For more information about designing an autoranging AC input power supply using the FARM and Vicor DC-DC converter modules, contact Vicor Applications Engineering at the nearest Vicor Technical Support Center, or send E-mail to apps@vicr.com.
70 65 60 55 50 45 40 2 5 15 30 50
Output Voltage
Figure 17--Converter ripple rejection vs. output voltage Another consideration in hold-up capacitor selection is their ripple current rating. The capacitors' rating must be higher than the maximum operating ripple current. The approximate operating ripple current (rms) is given by: I rms = 2P/Vac Where: P = total output power Vac = operating line voltage Calculated values of bus capacitance for various hold-up time, ride-through time, and ripple voltage requirements are given as a function of operating power level in Figures 14, 15, and 16, respectively. (7)
***
Example
In this example, the output required from the DC-DC converter at the point of load is 12Vdc at 320W. Therefore, the output power from the FARM would be 375W (assuming a converter efficiency of 85%). The desired hold-up time is 9 ms over an input range of 90 to 264Vac. Determining Required Capacitance for Power Fail Warning. Figure 14 is used to determine capacitance for a given power fail warning time and power level, and shows that the total bus capacitance must be at least 820 F. Since two capacitors are used in series, each capacitor must be at least 1,640 F. Note that warning time is not dependent on line voltage. A hold-up capacitor calculator is available on the Vicor website, at vicorpower.com.
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
FARM, Filter/Autoranging Rectifier Module
Rev. 4.7
Page 9 of 12
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PRELIMINARY
Mechanical Diagram
Converter Pins No. Function Label 1 Neutral N 2 EMI GND 3 NC 4 Line L 5 -Out - 6 Enable EN 7 Strap ST 8 BUS OK BOK 9 +Out +
0.50 0.02 12,7 0,5
0.23 (REF) 5,8 0.300 0.015 7,62 0,38
2.20 55,9 1.74 44,2 0.12 3,1
0.01
0.49 12,4
2.000 50,80
0.10 2,5 0.10 X 45 2,5 CHAMFER
1 0.300 0.015 7,62 0,38
2
3
4 1.900 48,26
0.35 (2X) 8,8 2.28 1.30 57,9 33,0
12
9 8 7 6 5
0.65 16,5
FULL R (6X)
0.130 3,30
(6X)
0.400 10,16
0.150 DIA,(2X) 3,81 0.080 DIA,(7X) 2,03 0.700 17,78 1.000 25,40 1.400 35,56
0.42 10,6 0.54 (9X) 13,7 0.62 (9X) 15,7
R
0.06 (3X) 1,5
Slotted (Style 1) or Threaded (Style 2)
4-40 UNC-2B (6X)
Pin Style 1&S
(Short )
2.20 55,9 (REF.)
Use a 4-40 Screw (6X) Torque to: 5 in-lbs 0.57 N-m
Pin Style 2 &N
(Long)
or Thru Hole (Style 3)
#30 Drill Thru (6X) (0.1285)
PCB Mounting Specifications
INBOARD SOLDER MOUNT PIN STYLE 1&S PCB THICKNESS 0.062 0.010 1,57 0,25 PLATED THRU HOLE DIA 0.158 4,01 (7X) 0.094 0.003 2,39 0,08 0.164 0.003 4,16 0,08
ONBOARD SOLDER MOUNT PIN STYLE 2&N 0.094 0.003 2,39 0,08 0.164 0.003 4,16 0,08
ALL MARKINGS THIS SURFACE
0.06 R (4X) 1,5
1.790 45,47
(2X)
ALUMINUM BASEPLATE PINS STYLES STYLE 1 & 2: TIN/LEAD HOT SOLDER DIPPED STYLE S & N: GOLD PLATED COPPER
1
2
3
4
1.900* 48,26 48.26
1.584* 40,23
9
8
7
6
5
0.400* 10,16 0.700* 17,78 1.000* 25,40 1.400* 35,56 * DENOTES 0.003 TOL = 0,08
0.43 10,9
0.53 13,5
0.195 4,95
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
FARM, Filter/Autoranging Rectifier Module
Rev. 4.7
Page 10 of 12
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PRELIMINARY
Notes
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
FARM, Filter/Autoranging Rectifier Module
Rev. 4.7
Page 11 of 12
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Vicor's comprehensive line of power solutions includes modular, high density DC-DC converters and accessory components, configurable power supplies, and custom power systems.
Information furnished by Vicor is believed to be accurate and reliable. However, no responsibility is assumed by Vicor for its use. No license is granted by implication or otherwise under any patent or patent rights of Vicor. Vicor components are not designed to be used in applications, such as life support systems, wherein a failure or malfunction could result in injury or death. All sales are subject to Vicor's Terms and Conditions of Sale, which are available upon request.
Specifications are subject to change without notice.
45
Component Solutions for Your Power System
Vicor Corporation 25 Frontage Road Andover, MA, USA 01810 Tel: 800-735-6200 Fax: 978-475-6715 Email Vicor Express: vicorexp@vicr.com Technical Support: apps@vicr.com
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
FARM, Filter/Autoranging Rectifier Module
P/N 22952
Rev. 4.7
4/03/10M
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