Precision Control Systems 930 - Manual (Page 11)

Model 930 ControlIR TM Instruction Manual Operating Instructions
Research, Inc. Page 7 of 25
Cooling Flow Switch
Interlock
Heater Over-Temperature
Thermo-switch Interlock
Remote Interlock Switch
Heater Open Switch
Interlock
This feature provides shutdown of the heater power in case of low or no cooling flow.
This is accomplished by opening the heater power controller contactor. The cooling
sensor may be a water flow or air flow switch. Use a switch with contacts that are open
during the fault condition.
Connect the flow switch to TB 100 pins 2 and 3. If both water and air cooling flow
switches are used in a system, wire the switches in series and then connect to the
system.
This feature provides shutdown of the heater power in case of a heater over-
temperature.
This is accomplished by opening the heater power controller contactor. If a thermo-
switch
is not included with your heater, use a thermo-switch with contacts that will open
during
the over-temperature condition. If this feature is desired or provided with the heater,
connect using the following procedure:
1. Remove the factory installed jumper at TB 100 pins 4 and 5.
2. Connect the thermo-switch to TB 100 pins 4 and 5.
3. If more than 1 thermo-switch is used, in a system, wire the switches in series and
then connect to the system.
This feature provides for remote process interlock shutdown of the heater power. This
is accomplished by opening the heater power controller contactor. With the interlock
open, the heater can not be turned on from the control system front panel. The switch
contacts must be open during the heater off condition. If this feature is desired, connect
using the following procedure:
1. Remove the factory installed jumper at TB 100 pins 10 and 11.
2. Connect the normally open contacts of the switch to TB 100 pins 10 and 11.
3. If more than 1 interlock switch is used in a system, wire the contacts in series and
then connect to the system.
This feature provides shutdown of the heater power if the heater is opened during
operation. This switch directly interlocks power to the heater contactor. If a heater
cavity
open switch is not included with your heater, use a switch with contacts that are open
when the heater is open. To implement feature, connect using the following procedure:
1. Remove the factory installed jumper at TB 100 pins 14 and 15.
2. Connect the normally open contacts of the switch to TB 100 pins 14 and 15.
3. If more than 1 heater open interlock switch is used in a system, wire the contacts in
series and then connect to the system.
NOTE:
If a remote Emergency Stop switch is desired, wire the switch (push/pull type with
maintained contacts) in series with the heater open switch.