Logic Board Input And Output Connections; Communication Connections; Controller Connection; Controller Ground - Kohler MPAC 1500 Manual

1.1.1 Logic Board Input and Output
Connections
Logic board terminal strip TB1 has two programmable
inputs and two programmable outputs. See Figure 1-1
for the connector location.
Note: For bypass/isolation switches, input 1 is factory-
connected to the Bypass Contactor Disable
circuit.
Note: For service entrance switches, input 1 is factory-
connected to the transfer inhibit circuit.
Each input has a signal and a return connection. The
outputs are C form contacts with ratings of
500 mA @ 120 VAC.
connections. Use #12--24 AWG wire and tighten the
connections to 0.5 Nm (4.4 in. lbs.).
See Section 8.4 for instructions to connect to optional
input/output modules.
The controller logic board's programmable inputs and
outputs can be assigned to the functions shown in
Section 5.12. Refer to the I/O functions shown in
Figure 5-18 and Figure 5-19
connections. You will need to assign functions to the
programmable inputs and outputs through the controller
interface using the Setup Menu—Set Inputs/Outputs
later.
Output 1 NO
Output 1 C
Output 1 NC
Input 1B
Input 1A
NC = normally closed
NO = normally open
C = common
Figure 1-2 Logic Board Input and Output
Connections to TB1
12 Section 1 Installation
See Figure 1-2 for
for planning
TB1
Output 2 NO
Output 2 C
Output 2 NC
Input 2B
Input 2A
1.1.2

Communication Connections

See Section 6 for instructions to connect to the
controller's RS-485 serial port or Ethernet port for
Modbus communication.
instructions to use the USB port for file transfer.
1.1.3

Controller Connection

Verify that the contactor harness is connected at the
controller base (or at the logic disconnect switch, if
equipped). See Figure 1-3.
Note: Verify that the power is disconnected before
connecting or disconnecting the contactor
harness.
the
1.1.4

Controller Ground

Verify that the grounding wire is connected from the
controller's lower left mounting stud to the enclosure.
This connection provides proper grounding that does
not rely upon the door hinges.
and
2
6431
1. Contactor Harness Connection
2. Ground Connection
Figure 1-3
See Section 6.4 for
1
Contactor Harness and Controller
Ground Connections
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