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2.4 EXTERNAL SIGNAL TERMINAL BLOCK
The UPS is equipped with a series of input/output terminals for external annunciation of alarms and
for remote access of certain UPS functions. The layout of terminals is shown in Figure 2.10 with a
functional description of the input/output port presented. OUT1 to OUT8 are user programmable,
but are factory default set being also shown in Figure 2.10.
Adding same external I/F PCB "IOAU-19", doubling signal outputs is applicable for OUT1 to OUT8.
Figure 2.10(a) External Signal Terminal Block TN21-25 (NEC Class2)
TN21-25
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UPS
9900D SERIES UPS
OWNERS / TECHNICAL MANUAL
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*1
MITSUBISHI ELECTRIC 9900D SERIES UPS
Summary Alarm
OUT1: LOAD ON BYPASS
OUT2: LOAD ON INVERTER
OUT3: BATTERY OPERATION
OUT4: CONVERTER OPERATION
OUT5: BATTERY LOW VOLTAGE
OUT6: OVERLOAD
OUT7: SPARE
OUT8: TOTAL ALARM
52C CLOSE
*1 Relay contactor (52C close): Normally Closed
Page Number:
2-8
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