Series 92 User's Manual TOTAL CUSTOMER SATISFACTION DIN Rail Mount Limit or Temperature Control 3 Year Warranty ISO 9001 Registered Company Winona, Minnesota USA Watlow Controls Watlow Controls, 1241 Bundy Blvd., P.O. Box 5580, Winona, MN 55987-5580, Phone: 507/454-5300, Fax: 507/452-4507 0600-0020-0000 Rev. B March 1998 Supersedes: W092-MA10-9311 (1291) $10.00 Made in the U.S.A.
General Description The Watlow Series 92 is a DIN rail-mounted (DIN EN 50022) analog control. If a DIN rail is not available, the Series 92 can be mounted using two screws. The control mode is ON/OFF, limit or PI. The input for the Series 92 is a single Type J, K or T thermocouple, or DIN curve RTD sensor input. For the output device, choose from an electromechanical relay, switched DC voltage (open collector), solid state relay, or an optional variable burst-fired output.
Ordering Information Limit 9 2 3 D 0 0 0 Line Voltage A = 120VAC B = 208/240VAC Control Type 3 = Limit Control Mode 1 = High (heat) 2 = Low (cool) Output D = Electromechanical relay, Form C, 5A (Warranted to 100,000 cycles) Input and Range See Page 2 for ranges J1 J2 K1 T1 P1 = = = = = Setpot 0 = 1 = J t/c J t/c K t/c T t/c RTD Separate Remote Set Point Assembly A006-0 _ _ _ 515 516 517 518 519 Integral Remote* (order setpot separately, see above) PI On/Off 9 2 1 Line Voltage A = 120VAC B = 2
3.89" (99 mm) Installation 3.72" (95 mm) 2.28" (58 mm) 0.33" (8 mm) 0.18" (5 mm) 1.62" (41 mm) 1 2 3 4 700 7 8 5 6 9 4.45" (113 mm) 800 300 500 500 1000 200 1100 600 300 100 700 1300 100 0 750 C F TYPE J T/C LOAD 35mm X 7.5mm Rail is not included in the assembly 4.10" (104 mm) SERIES 92 3.75" (95 mm) BAND 10 11 12 13 14 15 16 17 Release Lever Figure 1 - Series 92 Dimensions Mounting DIN-Rail Mounting the Series 92 1.
Line Voltage WARNING: To avoid potential electric shock, use National Electric Code safety practices when wiring and connecting this unit to a power source and to electrical sensors or peripheral devices. All wiring and fusing must conform to the National Electric Code and to any locally applicable codes also.
Input Wiring NOTE: When an external device with a nonisolated circuit common is connected to the DC (open collector) output, you must use an isolated or ungrounded thermocouple. 92XX - XXJ1 - X0XX 92XX - XXJ2 - X0XX 92XX - XXK1 - X0XX 10 11 12 13 14 15 16 17 + - 92XX - XXT1 - X0XX Red k Figure 6 - Thermocouple Wiring 92XX - XXP1 - X0XX 2 Wire RTD 92XX - XXP1 - X0XX 3 Wire RTD k NOTE: Jumper Terminals 11 and 12 for a 2 wire RTD.
Output Wiring 92XX - XBXX - X000 92XX - XCXX - X000 92XX - XVXX - X000 L2 External Load - L1 N.O. 1 2 3 Fuse COM 4 5 External Load + 6 7 8 1 9 2 3 4 5 6 7 8 9 NOTE: Contact suppression is not recommended for high impedance loads such as AC input SSR's. Figure 8 - Solid State Relay with Contact Suppression, Form A, 0.5A Figure 9 - Switched DC, Open Collector OR Variable Time Base, Zero Cross Non-Isolated 92XX - XKXX - X000 92XX - XDXX - X000 L2 L2 External Load N.O.
System Wiring Example L1 120 VAC L2 High temp. light Earth Ground Coil High Limit Mechanical Contactor Fuse 11 12 SSR-240-10G-DC1 DC Input SSR 3 (+) 92A3-1DJ1-0000 Limit Control Out 1 4 In 2 3 9 + Heater 5 (-) 10 13 10 + Red 965A-3CA0-0000 Rear View Process Sensor 14 11 - Optional Normally Open Momentary Switch Limit Sensor çWARNING: The Series 92 Temperature Limit Switch should be mounted in an inconspicuous location to discourage unauthorized changes to the set point.
Tuning (cont.) Tuning Procedure for PI Controls 92X2 - XXXX - X0XX Initial Settings: • Proportional band: 5 to 50°F/2.8 to 27.8°C Maximum proportional band is clockwise (CW), minimum (CCW). Located on the front of the control labeled "Band." • Cycle time, fixed. Typically 6 seconds. • Automatic reset, fixed. Typically 0.25 repeats/ minute Proportional Band Adjustment: Rotate the proportional band pot CCW 1/4 turn and observe system stability.
Glossary 1. Automatic Reset (Integral) - Used in proportional control systems to automatically pick up any system droop. This action may be adjustable or fixed, and adjusts the output level to obtain agreement between actual process temperature and controller set point. 2. Automatic Reset on Power Loss - The limit control does not recognize the power outage as a limit condition. When power is restored, the output will energize automatically as long as a temperature limit condition does not exist. 3.
Troubleshooting Chart Problem Probable Cause Poor temperature control. The proportional band is not adjusted properly. Adjust the proportional band per Tuning. See Page 9. The load will not turn ON. 1. An open sensor. Repair or replace. 2. The load circuit is open. Check the fuses, circuit breakers, load, and wiring. See Line Voltage, Page 5.. 3. The AC input is not connected or is connected improperly. Check the AC input connections. If not present or proper, connect per Line Voltage.
Watlow Series 92 User's Manual Watlow Controls, 1241 Bundy Blvd., P.O.
Series 92 Addendum ç WARNING: The Series 92 Temperature Limit Switch should be mounted in an inconspicuous location to discourage unauthorized changes to the set point. Only approved and appropriate personnel should have the authority to change the set point on the limit switch. Failure to comply with these recommendations could result in damage to equipment and property, and injury to personnel. Watlow Controls 1241 Bundy Blvd., P.O.
