Module Power and Miscellaneous I/O
82 RTHC-SVD01B-EN
Table 13-9: Options Module Nominal Terminal Voltages (1U5)
Terminal
Designation
Description of Circuit Normal Terminal Voltages for Various Conditions
J1-3 (BK)
J1-4 (W)
IPC Communications 19.2 kbaud serial data, RS485 volt signal level. Refer to
Interprocessor Communication (IPC)
J2-1 or 3 to
J2-2 or 4
Input Power 115 VAC, Refer to Power Supply
J3-7, 8 Ice Machine Control
Input
open: 24 VDC: standard comfort cooling
closed: 0 VDC: Ice making mode
Unit remains in ice making unit contacts open or until the
entering evap. water sensor reaches the ice termination
setpoint.
NOTE: “Ice Building Options” under Service Settings,
Machine Configuration Group must be Enabled. The “Ice
Building: (Enable/Disable)” under Operator Settings
needs to be Disabled for normal operation. This option
should only be enabled when the operator wants to put
the chiller into ice making immediately from the front
panel.
J7-1,2 Condenser Pressure
Analog Output
Outputs analog signal proportional to Condenser
Pressure per temp to pressure conversion for R134a.
0-10 VDC output
J7-3, 4 % Compressor RLA
output
2-10 VDC output signal.
2 V = 0% RLA
10 V = 120% RLA
NOTE: 4-20 mA is not available.
J7-7, 8 Tracer Temp. Sensor
Input
An additional temperature sensor input to tie to Tracer.
Not used on stand alone units.
J7-11, 12 External Current Limit
Setpoint Input (Current
or voltage option)
Refer to External Setpoint Inputs
Unreferenced 2-10V or 4-20 mA Input (SW2-1)
J8-1, 2 Ice Machine Relay
(N.O.)
Open: Normal operation
Closed: Unit running in Ice Making mode
The contacts are rated for a max. of 250 VAC or 30 VDC.
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