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Operating and Maintenance Instructions
Appendix B – Electrical Connections
The following is an image of the PCB showing location and identity of connectors and pin functions.
SUPPLY
PCB
BOTTOM
SIDE
Sealing Plug: DO NOT connect fan's 10VDC output here if
PCB TOP
controller is powered from an external power supply
SIDE
PCB Bottom Side
Control & Supply
RS485 Master (Fans)
RS485 Slave
(BMS or other Modbus
Master device)
3-way Pluggable Connector – Manufacturer: IMO Precision Controls – Part Number: 20.1550M/3-E
Note:
All "Power supply +" and "+24V" terminals are common (i.e. connected together)
All "0V" terminals are common (i.e. connected together)
PCB Top Side
Configurable Alarm Output
60V DC max 300mA
2-way Pluggable Connector
Crimp terminal AWG 22 to AWG28
Note: There are two other connection points on the controller not detailed in this manual that currently do not
have any function
210-OMI14229-Iss2
CONTROL & SUPPLY
Figure 23 - PCB Connections
PCB
Label
0V
Supply
+
POT
0-10V
0V
+
A
B
0V
+
A
B
0V
Table 4 – PCB Bottom Side Connector Identities and Pin Functions
PCB Label
Relay
(2-way)
Table 5 – PCB Top Side Connector and Pin Function
Operation & Maintenance Instructions
© ebm-papst UK Ltd 2018
Chelmsford Business Park Chelmsford Essex CM2 5EZ
Telephone: +44(0)1245468555 Fax: +44(0)1245466336
e-mail
sales@uk.ebmpapst.com
RS485 MASTER
Connection
Common 0V (GND)
Power Supply +
+10VDC Output (only when Supply is 24VDC)
Speed Control Input / Pressure Sensor Input
Common 0V (GND)
Power supply +
RS485 'A' from Fans
RS485 'B' from Fans
Common 0V (GND)
Power supply +
RS485 'A' from 3
rd
RS485 'B' from 3
rd
Common 0V (GND)
RL
Common Relay Contact
RL
Normally Closed Relay Contact
– Manufacturer: Molex – Part Number: 57-37-5023
– Manufacturer Molex – Part number 08-70-1040
RS485 SLAVE
RELAY
Party System e.g. BMS
Party System e.g. BMS
Connection
Page 27 of 45
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