278
JOHNSON CONTROLS
FORM 201.21-NM4 (616)
278
JOHNSON CONTROLS
MICRO PANEL
DIGITAL OUTPUT CONNECTIONS
TABLE 24 lists the digital outputs and the plug/termi-
nals of the circuit board they originate from. Not all of
the outputs will be used on every unit. Signal levels
may be 12VDC, 120VAC, or a dry contact (no voltage)
closure). 120VAC signals typically may show only
one connection point; the other will be neutral (Wire
2). Outputs which reference multiple boards, such as
“Chiller Control Board / Relay Board 1” indicate the
signal originates on the Chiller Control Board as a 0-
12VDC digital signal (example: J9-1) that is then fed
to the Relay board and output as a dry contact closure
between TB1-20 and 19. In this case, outputs from both
boards are called out in the table.
The 0-120VAC single digital outputs from the Relay
Output Boards are referenced to neutral (Wire 2). For
example, the fan output on TB1-6 is a single 120VAC
output. 0-12VDC outputs from the Chiller Control
Board are referenced to common (return, ground) in
the system. J12-3 can also be used as common, as well
as chassis ground, or the common terminal point on the
Chiller Control Board. See the wiring diagrams. Refer
to the wiring diagrams whenever there is a requirement
for tracing out these signals.
TABLE 24 - DIGITAL OUTPUT CONNECTIONS
BOARD
HEADER
ANALOG OUTPUT
Chiller Control / Relay Board 1
J9-1 / TB1-20 and 19
Evaporator Heater
Chiller Control / Relay Board 1
J9-2 / TB1-18 and 17
Sys 1/3 VSD Run
Chiller Control / Relay Board 1
J9-3 / TB1-16 and 15
Sys 1/3 Alarm
Chiller Control / Relay Board 1
J9-4 / TB1-14 and 13
Evaporator Heater 2
Chiller Control / Relay Board 1
J9-5 / TB1-12 and 11
Sys 1 SPARE
Chiller Control / Relay Board 1
J9-6 / TB1-10 and 9
SPARE
Chiller Control / Relay Board 1
J9-7/ TB1-8 and 7
SPARE
Chiller Control / Relay Board 1
J9-8 / TB1-6
Sys 1 Condensor Fans Output 1
Chiller Control / Relay Board 1
J9-9 / TB1-5
Sys 1 Condensor Fans Output 2
Chiller Control / Relay Board 1
J9-10 / TB1-4
Sys 1 Condensor Fans Output 3
Chiller Control / Relay Board 1
J9-11 / TB1-3
Sys 1 Compressor Heater
Chiller Control / Relay Board 1
J9-12 / TB1-2
Sys 1 Economizer Solenoid Valve
Chiller Control / Relay Board 2
J10-1 / TB1- 20 and 19
Evaporator Pump Start
Chiller Control / Relay Board 2
J10-2 / TB1-18 and 17
Sys 2/4 VSD Run
Chiller Control / Relay Board 2
J10-3 / TB1-18 and 15
Sys 2/4 Alarm
Chiller Control / Relay Board 2
J10-4 / TB1-16 and 14
Chiller Run
Chiller Control / Relay Board 2
J10-5 / TB1-12 and 11
Sys 2 SPARE
Chiller Control / Relay Board 2
J10-6 / TB1-10 and 9
SPARE
Chiller Control / Relay Board 2
J10-7 / TB1-8 and 7
SPARE
Chiller Control / Relay Board 2
J10-8 / TB1-6
Sys 2 Condensor Fans Output 1
Chiller Control / Relay Board 2
J10-9 / TB1-5
Sys 2 Condensor Fans Output 2
Chiller Control / Relay Board 2
J10-10 / TB1-4
Sys 2 Condensor Fans Output 3
Chiller Control / Relay Board 2
J10-11 / TB1-3
Sys 2 Compressor Heater
Chiller Control / Relay Board 3
J10-12 / TB1-2
Sys 2 Economizer Solenoid Valve
Chiller Control / Relay Board 3
J11-1 / TB1-20 and 19
Sys 4 Condensor Fan Output 1
Chiller Control / Relay Board 3
J11-2 / TB1-18 and 17
Sys 4 Condensor Fan Output 2
Chiller Control / Relay Board 3
J11-3 / TB1-16 and 15
Sys 4 Condensor Fan Output 3
Chiller Control / Relay Board 3
J11-4 / TB1-14 and 13
Sys 4 Compressor Heater
Chiller Control / Relay Board 3
J11-5 / TB1-12 and 11
Sys 4 Economizer Solenoid Valve
Chiller Control / Relay Board 3
J11-6 / TB1-10 and 9
Sys 4 SPARE