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Operating and Maintenance Instructions
210-OMI14229-Iss8.1
CN1116 Full OMI
Page 30 of 47
© ebm-papst UK Ltd 2021
Chelmsford Business Park Chelmsford Essex CM2 5EZ
Telephone: +44(0)1245468555 Fax: +44(0)1245466336
Appendix B
–
Electrical Connections
The following is an image of the PCB showing location and identity of the connectors and pin functions.
PCB Bottom Side
PCB
Label
Connection
Supply
0V
Common 0V (GND)
+
Power
Control & Supply
POT +10VDC Output (only when supply to controller is at least 12VDC)
0-10V
Speed Control Input / Pressure Sensor Input
0V
Common 0V (GND)
+24V
Power
RS485 Master
(Fans)
A
RS485 ‘A’ from Fan
s
B
RS485 ‘B’ from Fan
s
0V
Common 0V (GND)
+
Power
RS485 Slave
(BMS)
A
RS485 ‘A’ from 3
rd
Party System e.g. BMS
B
RS485 ‘B’ from 3
rd
Party System e.g. BMS
0V
Common 0V (GND)
Table 4
–
PCB Bottom Side Connector Identities and Pin Functions
Mating 3-way Pluggable Connector
–
Manufacturer: IMO Precision Controls
–
Part Number:
20.1550M/3-E
Note:
All “Power ” and “+24V”
terminals are common (i.e. connected together)
All “0V” terminals are common (i.e. connected together)
PCB Top Side
PCB Label
Connection
Configurable Alarm Output
Relay
60VDC - 0.1A
RL
Common Relay Contact
RL
Normally Closed Relay Contact
Table 5
–
PCB Top Side Connector and Pin Function
Mating 2-way Pluggable Connector
–
Manufacturer: Molex
–
Part Number: 50-37-5023
Crimp terminal AWG 22 to AWG28
–
Manufacturer Molex
–
Part number 08-70-1040
Note
: Do not connect anything to the 4-way plug-
in “COM” connector or to the 5
-way plug-in
“I2C / SPI”
and
“PROGRAMM
ER
” connectors.
PCB
BOTTOM
SIDE
PCB TOP
SIDE
Sealing Plug:
DO NOT CONNECT the 10VDC
output from fans here if the controller is
powered from an external power supply.