JOHNSON CONTROLS
289
SECTION 8 - MICROPANEL
FORM 201.23-NM2
ISSUE DATE: 09/25/2020
8
DIGITAL OUTPUT CONNECTIONS
Table 28 on page 289 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 12 VDC, 120 VAC, or a dry contact
(no voltage) closure). 120 VAC 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 VDC to 12 VDC 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 VAC to 120 VAC 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
120 VAC output. The 0 VDC to 12 VDC 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. See the wiring diagrams whenever
there is a requirement for tracing out these signals.
TABLE 28 - 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
To Next Page
Loading...
