Control Systems
V-146
4
4
Power distribution system
4-1. SiM (WHM interface module) (MIM-B12)
4) RS485 connection with DMS and watt-hour meters
5) LED display
• All channels for connection with watt-hour meters support non-polarity RS485 communication.
Also they support automatic watt-hour meter detection for 5 designated meters.
But interface with DMS has polarity for C1 and C2 terminals, which requires extra attention when making connection.
2-times short consecutive LED blinking indicates SiM request and WHM response respectively,
which means normal communication state. Communication block indicates 1-time LED blinking.
;
NN
NN
oo
oo
tt
tt
ee
ee
C2 terminal
Green : Communication with CH8 watt-hour meter
Green : Communication with CH7 watt-hour meter
Green : Communication with CH6 watt-hour meter
Green : Communication with CH5 watt-hour meter
Green : Communication with CH4 watt-hour meter
Green : Communication with CH3 watt-hour meter
Green : Communication with CH2 watt-hour meter
Green : Communication with CH1 watt-hour meter
Yellow : Communication with DMS
RED : Power supply
C1 terminal
CH5 : Address 5 CH7 : Address 7
CH1 : Address 1 CH3 : Address 3
CH6 : Address 2 CH8 : Address 8
CH2 : Address 2 CH4 : Address 4
05-4~6_control systems(142~171 3/6/08 14:09 Page 146
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