OPTI TEMP OTC-3.0A - Electrical Interfacing

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12.10 Electrical Interfacing
Standard Electrical Interfacing/Controls Configuration for OTC Series Chillers
Contacts
Description
Type
Pins
Connector
Standard
Set 1: Primary Contacts
Critical Chiller Faults Change of State
Pins (8&9) 9 Pin D-Sub
Standard chiller protections placed in series on Primary circuit/contact set. Cummulative (male)
Compressor & pump shuts down on pump alarm/critical water level and provides contact closure.
Compressor shuts down on freeze condition and/or refrigerant pressure(s) and provides contact closure. Pump continues to run.
Panel indicator lamps are included for system run, temperature out-of-tolerance, pump & freeze condition faults.
Optional Set 2: Secondary Contacts
Non-critical user requested Faults
Change of State Pins (6&7)
9 Pin D-Sub
Change of state options placed in parrallel on secondary circuit. Cummulative (male)
Output contacts close on any fault.
Available options: Low Flow Indicator (flow swtch) with discrete Indicator Lamp
Low Water (Add Water condition) with discrete Indicator Lamp
Temperature out of tolerance (hi temp or hi/lo temp) (Panel indicator standard)
Optional Set 3: Remote Start /Stop Contacts Remote Start / Stop Change of State Pins (1&4)
9 Pin D-Sub
Remote start / stop via 24 VDC Discrete (male)
Optional
Set 4:
Serial Comm. Contacts
RS-232 or RS-485
Serial Comm.
Pins (2,3&5)
9 Pin D-Sub
Allows Read / Write of all temperature controller functions.
Mod Bus Protocol
(male)
Optional Set 5:
Auxilary Contacts
Variable Output
TBD
Auxilary Connector
Variable Output Options Analog (Female)
Available Options include:
Flow Meter
Pressure Transducer
Resistivity Output
Remote Temperature Sensing
Temperature Retransmission
Notes:
1) "Normally Open" or "Normally Closed" contacts should be specified at time of order.
2) Consult OTM or OTC Series Chiller Configuration & Option Matrix for additional information regarding available options.
3) Contact OPTI TEMP applications engineering at 231-946-2931 for assistance.