control resources incorporated e-mail: sales@controlres.com web: www.controlres.com accepts and diode ors dual power feeds in the range from 10 to 75 vdc maximum fan current is 4.0 amps (still air) and 5.0 amps (200 ft/min air stream) at 55? soft start and current limiting at start up 12, 24 or 48 vdc operation is selectable by jumper accepts temperature (thermistor) inputs from up to three or? sensors and provides proportional speed control to the fans. jumper selectable control temperatures of 35? 40? or 45? a temperature alarm is triggered if sensor temperature reaches 10? above control temperature or if cooling system power is lost compatible with smartfan tachscan-3 and tachscan-9 fan speed alarms small size of 1.5" x 5.0" permits mounting in small spaces with in fan trays, etc. agency approvals (cul) pending multi sd speed control for dc fans new fan speed control and temperature alarm smartfan multi sd is a new generation fan speed control and temperature alarm designed for dc fans and blowers. by controlling fan speed, multi sd can regulate temperature, reduce acoustical noise and improve reliability. multi sd offers features that were previously only available on custom products. the multi sd includes diode oring and fusing of dual power features specifications u.s. patents 4,659,290, 4,722,699 and 5,364,026 09-01 supply maximum watts to fans 1 isolated part no. voltage range temperature alarm 200 ft/min still air sinking current 042d440 10 to 75 vdc 240 watts/5.0 amps 192 watts/4.0 amps 1 ma 042d440r 100 ma h118 hardware pack 1 air temperature of 55 c or less. feeds with a wide voltage range, jumper selectable 12, 24 or 48 vdc operation, multiple sensor inputs, fan current limiting and a full speed over-ride input. smartfan products are used extensively in a wide range of applications including file servers, storage subsystems, telecommunications, ate and medical equipment. download the installation/operation manual at our website: www.controlres.com/new_products.htm dimemsions in inches
smartfa n ? ? ? ? multi sd: installation & operation 09 -0 1 control resources incorporated 11 beaver brook road ? littleton, ma 01460 www.controlres.com ? sales@controlres.com tel: (978) 486-4160 fax: (978) 486-4772 page 1 features: input power: the multi-sd can accept one or two power sources in the range of 10-75 vdc. if two power supplies are used, they are logically or?d on the multi-sd so that the operating voltage is equal to the higher of the two supplies. the multi-sd can supply up to 4.0 amps to the fan load with natural convection or 5.0 amps to the fan load with 200 lfpm of forced convection, at 12, 24 vdc or 48 vdc. input power fuse: a 7.0 amp input power fuse is provided to protect the multi-sd from over-current conditions. inrush current: the input power supply connected to the multi-sd will see 100 microfarads of capacitance through 0 ohms. fan soft start: at the application of power, the multi-sd output voltage starts at 0 vdc. then, over a period of approximately 5 seconds the fan voltage is increased from 0 vdc to full voltage and then temperature (or pwm) based control begins. fan speed control: the speed of all fans is varied by adjusting the voltage applied to the fan(s). voltage adjustment is accomplished with a current mode, buck type pwm control circuit. the fan voltage range is 6.6-13 vdc for 12 vdc fans, 13-25 for 24 vdc fans and 26-50 vdc for 48 vdc fans. fan current limiting: the load regulating circuitry is configured with a 5 amp active current limit. multiple control temperature settings: three control temperatures (35c, 40c or 45c) are selectable by jumper. temperature based fan control: the voltage applied to the fan(s) is determined by the temperature sensor(s) connected to header j8. single point or multiple point sensing can be accomplished by connecting one to three thermistor sensors to positions t1, t2 and t3. the sensor reading the hottest temperature is used for fan voltage control when more than one sensor is used. pwm based fan control: the voltage applied to the fans can be controlled based on an isolated pwm signal applied to position t3 on header j8. fan speed up command input: a non-isolated input at header j5 allows the user to apply a signal that commands the fans to go to full speed. this command over-rides the temperature sensor or pwm input signals at header j8. temperature alarm: an isolated alarm output provides indication of a high temperature condition or a shorted or open sensor. the temperature alarm output is from an open collector output or mos relay. specialized configurations of the multi-sd the following parameters can be specialized by cri through software and/or component values changes: relationship between sensed temperatures and fan voltage relationship between pwm control signal and fan voltage temperature alarm trigger point fan turn off below a certain sensed temperature customized configuration of the multi-sd contact control resources? sales department for details on custom products.
smartfa n ? ? ? ? multi sd: installation & operation 09 -0 1 control resources incorporated 11 beaver brook road ? littleton, ma 01460 www.controlres.com ? sales@controlres.com tel: (978) 486-4160 fax: (978) 486-4772 page 2 installation mounting using the pcb support hardware in hardware pack h118, or eq u i v al e n t , m o u n t t h e m u lt i -sd on a flat s u r f ace u s i n g all f o u r mounting holes for maximum support. to minimize emi, s ec u re l y m o u n t t h e u n i t on a g r ou n ded s u r f ace u s ing a m e tal spacer and hardware at the mounting hole that is surrounded by a conductive pad. connections connector pin assignments: a description of the function of each connector pin and location is listed i n t a b l e 1 . 0. d e pe n d i n g on t h e m odel n u m b er a n d configuration of the multi-sd, some headers may not need to be connected. t a ble 1.0: c o n n ector p i n a s s i gn m e n t s header label description a p o w er s u pp l y a + p o w er s u pp l y a r e f e r e n c e b p o w er s u pp l y b j1 + p o w er s u pp l y b r e f e re n c e +fan power j2 - fan power reference c temperature alarm output, collector terminal (+) j4 e temperature alarm output, emitter terminal (-) c high speed command input (+) j5 e high speed command input reference (-) t1 temperature sensor 1 input t1 temperature sensor 1 input t2 temperature sensor 2 input t2 temperature sensor 2 input t3 temperature sensor 3 input (or pwm signal input) j8 t3 temperature sensor 3 input (or pwm signal reference) suggested connecting hardware u s e c r i h a r d w a re pack h 118 co n t a i n i n g t h e f o l l o w i ng c o m p o n e n ts s h o w n in t a b l e 2. 0 . t a ble 2.0: recom m e n ded hard w a re h118 hardware pack ref. des. header mfg. & part no. 1 11 1 qty description mfg. & part no. 1 11 1 1housing molex no. 09-50-8041 j1 molex no. 26-60-4040 4 terminal (tin) molex no. 08-50-0106 1housing molex no. 09-50-8021 j2 molex no. 26-60-4020 2 terminal (tin) molex no. 08-50-0106 1housing molex no. 22-01-2027 j4 molex no. 22-29-2021 2 terminal (gold) molex no. 08-55-0102 1housing molex no. 22-01-2027 j5 molex no. 22-29-2021 2 terminal (gold) molex no. 08-55-0102 1housing molex no. 22-01-3067 j8 molex no. 22-29-2061 6 terminal (gold) molex no. 08-55-0102 4 pcb support richco no. cbs-4-19 1 aluminum spacer richco no. alss6-2 1 screw, 6-32x5/8? mounting hardware 1 nut, 6-32 1 or equivalent input power connection to header j1 r e f e r to f i gu r e 1.0 f o r i n p u t p o w e r w i r i n g . o n e or t w o p o w e r supplies in the range of 30 to 75 vdc should be connected at header j1. if two power supplies are used, they are logically or?d on the multi-sd so that the operating voltage is equal to the higher of the two supplies. an or?ing diode is located in t h e a & b p o w e r s u pp l y l eg s . t h e m u lt i - s d c a n su pp l y u p t o 4.0 a m ps ( s t i l l a i r) a n d 5.0 a m ps (200 l f pm a i r s tr ea m ) at 12, 24 v d c or 4 8 v d c t o t h e f a n l o ad. ? 48 vdc telecom power system note: when a ?48 vdc power system is used to supply power to the multi-sd, connect ?48 vdc power return to j1:+ and ?48 vdc power to j1:a or j1:b.
smartfa n ? ? ? ? multi sd: installation & operation 09 -0 1 control resources incorporated 11 beaver brook road ? littleton, ma 01460 www.controlres.com ? sales@controlres.com tel: (978) 486-4160 fax: (978) 486-4772 page 3 r1 >= v1 vdc/1 ma, ohms 1 to 3 sensors can be used 12 v1 3.3 - 30 vdc logic voltage t1t2t3 v1_sense temp hml alarm fan x fan 3 j5 thermistors 123 48 24 full speed closed = constant full speed #th j6 voltage j4 j7 ce j3 fan 2 + +b a -+ source a 10-75 vdc source b 10-75 vdc fan out v in fan 1 smartfan multi - sd figure 1.0: m u lti-sd w i r i n g d i a g r a m f o r t e m p erat u r e s e n s o r based control. fan connection to header j2 fa n s are con n ected to h eader j 2 . r e f er to f i gu r e 1.0 f o r de t a i l s of fan power wiring. more than one fan can be connected in parallel to header j2 as long as the total current draw of the fan load does not exceed the rating of the multi-sd. connection of remote thermistor(s) to header j8 one to three thermistor sensors can be connected to the multi sd to provide temperature based fan speed control and alarming. r e f e rr i n g to f i g u re 1.0 , co n n ect t h e t h e r m i s t or( s ) to h eader j 8 . there is no polarity consideration when connecting the sensor(s). the thermistor reading the highest temperature is used for speed control and alarming. if no sensors are connected to header j8, fans continually operate at full voltage and the temperature alarm output at header j4 is open. connection of pwm control signal to header j8:t3 the multi sd can control fan speed based on an isolated pwm co n t rol s i g n al. r e f e rring to f i g u re 2.0 , co n n ect t h e v o lta g e signal to header j8:t3. header j8:t3 is internally pulled up to 4 vdc with a 10.0k ohm resistor. isolation of the pwm signal is required because the circuitry at j8:t3 is referenced to a floating voltage on the multi-sd. when a pwm signal is applied to j8:t3, no connections should be made to t1 or t2. t2 t1 no thermistors required in this mode j8 pwm t3 4.0 vdc through a 10 kohm pull-up resistor pwm freq. = 0.1 to 10 khz (1 khz recommended) fig u re 2.0: c o nn e c t i o n d i a g r a m f o r p w m c o n t r o l s i gn a l i n p u t . connection of an alarm circuit to header j4 an optically isolated open collector circuit output is connected to header j4 to provide remote indication of a high temperature c o n d iti o n . r e f e rri n g to f i g u re 1.0 , co n n ect lo g i c circuit r y to h eader j 4 . t h e alarm o u tp u t s m u s t be c u rre n t l i m ited as s h own in f i g u re 1. 0 . multi-sds featuring the mos relay alarm output should be co n n ected as i n dicated in f i g u r e 1.0 e x cept t h at t h e c u rre n t limiting resistor value is calculated using r1 = v1/100ma (ohms), where v1 can be up to 230 vac. connection of a fan speed up input signal to header j5 a non-isolated input is located at j5 that allows the user to command the fans to full speed when a short circuit is placed acro s s t h e t w o h eader pi n s . r e f e r to f i gu r e 1.0 f o r w i r i ng details. speed up command from a tachscan-3: an example of how this input can be interfaced with the tachscan-3 is shown in fi g u r e 3.0. in t h is ca s e, t h e n o r m a l l y open i s olated ala r m o u tp u t (j8:2a, 2b) from the tachscan-3 is connected to header j5 on the multi-sd. when the tachscan-3 senses that the speed of one or more fans drops below the trigger speed, the output closes and the multi-sd increases the speed of the fans to full. see the tachscan-3 product pages for additional details. similar configurations can be used with the tachscan-9.
s ma rtfa n ? ? ? ? multi sd: installation & operation 09 - 01 control resources incorporated 11 beaver brook road ? littleton, ma 01460 www.controlres.com ? sales@controlres.com tel: (978) 486-4160 fax: (978) 486-4772 page 4 optional alarm connections are not shown. 12/24/48vdc fans smartfan tachscan-3 fan speed up command j8 2b2a1b1a + a- + a- variable fan voltage + a- j7 +- source b 10-75 vdc source a 10-75 vdc v in fan out + -a b ++ j1 full speed t1t2t3 j5 thermistors c e smartfan multi - sd optional alarm connections are not shown figure 3.0: c o n n ecti o n dia g r a m f o r i n te r f ace of t ac h s c a n - 3 and multi-sd. only connections to implement the speed-up function are shown. operation remote sensor selection (j8) the multi-sd is compatible with sensors p1 through p9 shown on smartfan catalog sensor page. control temperature is a function of the temperature sensor selected and the position of the shunt (s3) on header j7. jumper settings (j3, j6, j7) there are three jumper settings that must be reviewed prior to applying power to the multi-sd: output voltage (j3), control temperature (j7) and number of thermistors (j6). settings are based on the particular application. following is a description of each jumper setting. output voltage setting (j3): the multi-sd can provide power to 12 vdc, 24 vdc or 48 vdc fans from a 10-75 vdc input v o l t a ge s o u r c e . t a b l e 3.0 de s c r i bes t h e f u n c t i o n of ea c h s e t t i ng. if the shunt is removed, the default fan type is 12 vdc. t a ble 3.0: fan v o l t age s e tt i n g p o siti o n o n hea d er j 3 fan voltage 12v (factory setting) 6.6 ? 13 vdc 24v 13 ? 25 vdc 48v 25 ? 50 vdc number of thermistor sensors (j6): use shunt s2 on header j6 to indicate the number of thermistor sensors that are co n n ected to h eader j 8 . t a b l e 4.0 de s cribes t h e f u n cti o n of each setting. when controlling based off of a pwm input control signal shunt s2 should be in the 1 position on header j6. t a ble 4.0: n u m b er of c o n trol i n p u ts position on header j6 number of sensor inputs 1 (factory setting) 1 (or pwm control) 22 33 control temperature setting (j7): the control temperature is the temperature at which the maximum voltage is applied to the fans. header j7 allows selection from three different control t e m p erat u r e s . t a b l e 5 .0 s h o w s t h e c o n t rol t e m p erat u r e v al u e f o r each jumper setting. if the jumper is removed, the default setting is m. t a ble 5.0: control t e m p eratures position on header j7 control temperature l 35c m (factory setting) 40c h 45c
smartfa n ? ? ? ? multi sd: installation & operation 09 -0 1 control resources incorporated 11 beaver brook road ? littleton, ma 01460 www.controlres.com ? sales@controlres.com tel: (978) 486-4160 fax: (978) 486-4772 page 5 fan speed control temperature based fan control: the voltage applied to the fan(s) is determined by the temperature sensor(s) connected to header j8. single point or multiple point sensing can be accomplished by connecting one to three thermistor sensors to positions t1, t2 and t3. the sensor reading the hottest temperature is used for fan voltage control when more than one sensor is used. the relationship between fan voltage and sensed t e m p erat u r e is s h o w n in fi g u r e 4.0. 40% 50% 60% 70% 80% 90% 100% 110% 29 31 33 35 37 39 41 43 45 47 49 sensor temperature, c fan voltage as a % of maximum tc = 35c (l) tc = 40c (m) tc = 45c (h) fig u re 4.0: fan v o lta g e v s . s en s or t e m p erat u r e f o r each co n t rol temperature setting. pwm based fan control: the voltage applied to the fans can be c o n t r o lled b a sed o n an is o l ated p w m si g n a l a p p lied to p o s iti o n t3 on header j8. pwm switching frequency should be in the ra n g e of 0.1 t o 10 k h z. f i gu r e 5.0 s h o w s t h e re l a t i on s h i p between the control signal applied at header j8:t3 and the fan voltage. note: fans voltage is 100% at a duty cycle of 0%. when a pwm signal is applied to j8:t3, no connections should be made to t1 or t2. when controlling based off of a pwm input control signal shunt s2 should be in the 1 position on header j6. 30% 40% 50% 60% 70% 80% 90% 100% 110% 50% 60% 70% 80% 90% 100% % duty cycle fan voltage as % of maximum fig u re 5.0: f a n v o l t a ge v s . c o n t r o l s i gn a l i n p u t . high temperature alarm (j4) a normally closed alarm output is provided at header j4 to i n dicate w h e n t h e s e n s ed t e m p era t u r e is 10c abo v e t h e co n t rol t e m p erat u r e. t a b l e 6 .0 s h o w s t h e s t a t us of t h e ala r m o u t p u t u n d er v a r i ous opera t i n g c o n d i t i ons a n d t a b l e 7 . 0 sh o w s the electrical rating of each output type. t a ble 6.0: a l a r m l og i c at hea d er j4 operating condition alarm status across j4:c-e sensed temperature < 10c above control temperature closed (low resistance) sensed temperature > 10c above control temperature open (high resistance) power removed from multi-sd open (high resistance) open or missing thermistor open (high resistance) shorted thermistor open (high resistance) t a ble 7.0: e l ectrical rating a t header j4 output type max. sink current max. applied voltage open collector p/n 042d440 1 ma at <= 0.4 vdc 30 vdc mos relay p/n 042d440r 100 ma at <= 0.5 vdc 230 vac
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