Chromalox MaxPac, User Manual, Page: 19 / 44

17
4.2.6 - Command Signal Wiring
Please refer to the following figure for illustrations of the 6-, 8-, and 10-pin input terminals.
Modbus
Connection
Customer
Inputs*
Not a
Customer
Connection
Outputs
for
Customer
Customer
Input
Outputs
for
Customer
**
Not a
Customer
Connection
*Only one customer input is allowed, eg. J3 pins 1 & 2 contact control may not be used at the same time as
J2 pins 6 & 7 (4-20 mA)
**Instrument power 4 VA maximum
MaxPac I, II, and III
On/Off Control Signals
AC Input – The 120 – 230 VAC signal lines are connected to terminal J1-7 & 8. An input voltage of
120 to 230 VAC turns the power On. The turn OFF voltage for the power control is 0 VAC.
DC Input – The 5 – 32 VDC signal lines are connected to terminal J3-1&4. An input voltage of 5 to 32
VDC turns the power On. The turn OFF voltage for the power control is 0 VDC.
NOTE: For AC or DC input to be used for ON/OFF control, SWI rotary switch must be set to position 0 and
unit must be jumpered for AUTO
Contact Closure Input – The dry contact signal lines are connected to terminal J3-1&2. A closed
contact turns the power On. The turn OFF is an open contact.