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Catalog 1308242 Issued 3-03
P&B
CH series
Mid- To Low-Priced CMOS IC Time Delay Relay
* Choice of timing modes
- Delay on operate - Delay on release - Interval on * Fixed or knob adjustable types * 10A output relay with DPDT contacts * Various models time from 1 to 180 sec.
File E22575 File LR15734
Users should thoroughly review the technical data before selecting a product part number. It is recommended that user also seek out the pertinent approvals files of the agencies/laboratories and review them to ensure the product meets the requirements for a given application.
Timing Modes
Delay on operate - Delay period begins when input voltage is applied. At the end of the delay period, the relay will operate and will not release until input voltage is removed. Reset occurs when input voltage is reapplied.
INPUT VOLTAGE ON OFF TIME
Contact Data @ 25C
Arrangements: 2 Form C (DPDT). Material: Silver-cadmium oxide alloy. Rating: 10A @ 30VDC or 277VAC, resistive; 1/2 HP @ 250VAC; 1/3 HP @ 120VAC. Expected Mechanical Life: 10 million operations. Expected Electrical Life: 100,000 operations, min., at rated load.
N.O. RELAY ON CONTACTS OFF
Initial Dielectric Strength
Delay on release - Input voltage must be applied continuously to operate the internal relay. When the control switch is closed, the relay energizes. When the control switch is opened, timing begins. When timing is complete, the relay will de-energize. Time may be reset to zero during timing by closing the control switch.
CONTROL SWITCH ON OFF TIME
Between Open Contacts: 500V rms, 60 Hz. Between All Other Conductors: 500V rms, 60 Hz.
Input Data @ 25C
Voltage: 24 through 240VAC and 24VDC. Power Requirement: AC Types: Typically less than 3 VA. DC Types: Typically less than 3 W. Transient Protection: Yes. Reverse Voltage Protection: Yes.
N.O. RELAY ON CONTACTS OFF
Input Voltages & Limits @ 25C
Interval on - The relay energizes and timing begins when input voltage is applied. At the end of the time delay period the relay will de-energize. Reset is accomplished by removing, then reapplying, the input voltage.
INPUT VOLTAGE ON OFF
Voltage Type AC
Nominal Voltage 24 120 240 24
Minimum Voltage 20 105 210 20
Maximum Voltage 28 130 260 32
DC
N.O. RELAY ON CONTACTS OFF
TIME
Note: DC voltage must be filtered (5% p-p ripple max. at nom. voltage). AC models will operate on 50 or 60 Hz.
Environmental Data Timing Specifications
Timing Ranges: From 1 to 180 sec. Timing Adjustment: Fixed and knob adjustable. Tolerance (for AC units add 1/2 cycle 60 Hz.): Knob Adj. Types:-0, +20% of max. specified at high end of timing range; min. specified, or less, at low end. Fixed Types: 5%. Res. Adj. Types: 5% at high end of timing range; min. specified, or less, at low end. Delta Time (for AC units add 1 cycle 60 Hz.): 10%. Repeatability (for AC units add 1 cycle 60 Hz.): 2%. Release Time: 125 ms, typ.; 200 ms, max. Recycle Time: 125 ms, typ.; 200 ms, max.
Dimensions are shown for
Temperature Range: Storage: -55C to +85C. Operating: -10C to +55C.
Mechanical Data
Termination: 8- or 11-pin octal style plug. Enclosure: White plastic case. Knob adjustable types have dial scale for reference only. Sockets: Models with 8-pin base fit either 27E122 or 27E891 (snap-on) screw terminal sockets. 11-pin types fit either 27E123 or 27E892 (snap-on) screw terminal sockets. Weight: 6 oz. (170g) approximately.
Specifications and availability subject to change. www.tycoelectronics.com Technical support: Refer to inside back cover.
1226 reference purposes only.
Dimensions are in inches over (millimeters) unless otherwise specified.
Catalog 1308242 Issued 3-03
P&B
Ordering Information - Authorized distributors are more likely to stock boldface items listed below.
Delay on Operate Models
Voltage 24VAC Time 1 to 10 Sec. 1 to 180 Sec. 1 to 10 Sec. 1 to 60 Sec. 1 to 180 Sec. 10 Sec. 1 to 10 Sec. 1 to 10 Sec. 1 to 60 Sec. 1 to 180 Sec. Adjustment Knob Wiring Dia. 1 Part Number CHB-38-30001 CHB-38-30003 CHB-38-70001 CHB-38-70002 CHB-38-70003 CHA-38-70001 CHB-38-80001 CHD-38-30001 CHD-38-30002 CHD-38-30003
Delay on Release Models
Voltage 24VAC 120VAC 24VDC Time 1 to 10 Sec. 1 to 10 Sec. 1 to 60 Sec. 1 to 180 Sec. 1 to 10 Sec. 1 to 180 Sec. Adjustment Knob Knob Knob Wiring Dia. 3 3 3 Part Number CHB-38-30011 CHB-38-70011 CHB-38-70012 CHB-38-70013 CHD-38-30011 CHD-38-30013
120VAC 120VAC 240VAC 24VDC
Knob Fixed Knob Knob
1 1 1 1
Interval on Models
Voltage 120VAC 24VDC Time 1 to 10 Sec. 1 to 60 Sec. 1 to 180 Sec. 1 to 10 Sec. Adjustment Knob Knob Wiring Dia. 1 1 Part Number CHB-38-70021 CHB-38-70022 CHB-38-70023 CHD-38-30021
Outline Dimensions
2.406 MAX. (61.1)
.56 (14.2)
Wiring Diagrams - Bottom Views (pins numbered clockwise from keyway)
EXTERNAL RESISTOR EXT SWITCH*

+ INPUT _ (DC POLARITY INDICATED)
+ INPUT (DC POLARITY INDICATED)
_
+
AC INPUT
-
Fig. 1 8 Pin
Fig. 2 11 Pin
Fig. 3 11 Pin
* If control switch is closed when power is applied, relay will immediately energize. A 50 millisecond minimum switch closure is required. IMPORTANT: A dry circuit switch is recommended. A "dry circuit" switch is one rated to reliably switch currents of less than 50mA. Use of a switch rated for other than dry circuit may result in failure of the time delay relay to function properly. ** Note: Input polarity for DC operation. For most reliable operation on AC, connect high side to "+" and low side to "-".
Dimensions are shown for reference purposes only.
Dimensions are in inches over (millimeters) unless otherwise specified.

.60 (15.2)
2.937 MAX. (74.6)
1.781 MAX. (45.2)

Specifications and availability subject to change.
www.tycoelectronics.com Technical support: 1227 Refer to inside back cover.

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