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• On long RS-485 cabling runs, the RS-485 trunk must be properly terminated at each end.
•
The MCS-BMS-GATEWAY has an End of Line (EOL) blue jumper. The default setting for this
Blue EOL switch is OFF with the jumper straddling the pins closest to the inside of the board of
the MCS-BMS-GATEWAY.
• On short cabling runs the EOL switch does not to need to be turned ON
•
If the MCS-BMS-GATEWAY is placed at one of the ends of the trunk, set the blue EOL jumper to
the ON position straddling the pins closest to the outside of the board of the MCS-BMS-GATE-
WAY.
• Always leave the single Red Jumper in the A position (default factory setting).
5.7. Power-Up MCS-BMS-GATEWAY
Apply power to MCS-BMS-GATEWAYas show below in Figure 13. Ensure that the power supply used complies
with the specifications provided in chapter 9.
6. MCS-BMS-GATEWAY accepts either 9-30VDC or 12-24 VAC on pins 4 and 5.
7. Frame GND should be connected.
Power Requirement for MCS-BMS-GATEWAY External Gateway
Current Draw Type
MCS-BMS-GATEWAY Family
12VDC/VAC
24VDC/VAC
30VDC
FPC – ED4 (Typical)
210mA
130mA
90mA
FPC – ED4 (Maximum)
250mA
170mA
110mA
NOTE:
These values are ‘nominal’ and a safety margin should be added to the power supply of the host system.
A safety margin of 25% is recommended.
Figure 12: Required current draw for the MCS-BMS-GATEWAY
Power to MCS-
BMS-GATEWAY
MCS-BMS-
GATEWAY
Pin #
Pin
Assignment
Power In (+)
Pin 4
V +
Power In (-)
Pin 5
V -
Frame Ground
Pin 6
FRAME GND
Figure 13: Power Connections
RS-485
EOL Switch
(off)
Leave in Position A
Figure 10: Rs-485 End-Of-Line Termination Switch on the MCS-BMS-GATEWAY
