Johnson Controls P2000 Hardware Installation page 8

CKM-MR16OUT
24-10707-82 Rev. D
Communications Wiring
The CKM-MR16OUT communicates to a controller via a two-wire RS-
485 interface. The interface allows multidrop communication on a single
bus of up to 4,000 feet (1,200 m). Use twisted pair (minimum 24 AWG)
with shield for the communication line.
Install the following jumpers for the RS-485 interface according to the
selected configuration.
Inputs for Cabinet Tamper/Power Fault
Input CT and input BA are used for monitoring cabinet tamper and power
failure with normally closed contacts. These two inputs are for contact
closure monitoring only, and do not use EOL resistors. If you are not
using these inputs, install a short piece of wire at the input to indicate a
safe condition.
CABINET
TAMPER
POWER
FAULT
Figure 4: CKM-MR16OUT Cabinet Tamper and Power Fault Wiring
Figure 3: CKM-MR16OUT Communications Wiring
Hardware Installation Manual
CT
BA
GND
4