JOHNSON CONTROLS
298
FORM 201.23-NM2
ISSUE DATE: 3/9/2015
SECTION 8 - MICROPANEL
DIGITAL OUTPUT CONNECTIONS
Table 24 on page 298 lists the digital outputs and the
plug/terminals of the circuit board they originate from.
Not all of the outputs will be used on every unit. Sig-
nal 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 neu-
tral (Wire 2). Outputs which reference multiple boards,
such as “Chiller Control Board / Relay Board 1” indi-
cate the signal originates on the Chiller Control Board
as a 0 to 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 to 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. The 0 to 12VDC outputs from the Chiller Con-
trol 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 re-
quirement 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 Condenser Fans Output 1
Chiller Control / Relay Board 1 J9-9 / TB1-5 Sys 1 Condenser Fans Output 2
Chiller Control / Relay Board 1 J9-10 / TB1-4 Sys 1 Condenser 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 Condenser Fans Output 1
Chiller Control / Relay Board 2 J10-9 / TB1-5 Sys 2 Condenser Fans Output 2
Chiller Control / Relay Board 2 J10-10 / TB1-4 Sys 2 Condenser 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 Condenser Fan Output 1
Chiller Control / Relay Board 3 J11-2 / TB1-18 and 17 Sys 4 Condenser Fan Output 2
Chiller Control / Relay Board 3 J11-3 / TB1-16 and 15 Sys 4 Condenser Fan Output 3
Chiller Control / Relay Board 3 J11-4 / TB1-14 and 13 Sys 4 Compressor Heater
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