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31
10. Communication
10.1 STS Module
The front panel of the STS Module contains all interface and communication devices of the UPS system, including dry contact ports (CN1 – CN8)
and communication ports (RS-232 serial, USB and SNMP card slot)
L RS232
USB
CD
SNMP
CN4
CN1
CN3
CN5 CN6
CN2
CN7 CN8
EPO
+VCC
+VCC
ENV
+VCC
+VCC
+VCC
+VCC
+VCC
+VCC
+VCC
+VCC
BCB.C
BCB.S
MAI.S
EXT.N
INT
BAT.C
BAT.D
GND
BAT.B
BYP.B
Figure 10.1
10.2 Dry Contact Ports
Dry Contact Number Function
CN1 Remote EPO (Emergency Power Off) Input port
CN2 Reserved for system use
CN3 BCB (Battery Circuit Breaker) port – reserved function
CN4 MBS (Maintenance Bypass Switch) port
CN5 Internal Output Switch port – reserved function
CN6 Battery Cabinet Temperature Detection port – reserved function
CN7 Battery Breaker Control port – reserved function
CN8 Bypass Backfeed Control port – reserved function
10.2.1 Remote EPO Input Port
The SmartOnline SV-Series UPS includes an Emergency Power Off (EPO) function for site safety. This may be operated via a user-provided remote
contact. User may define the logic (NC – Normal Close, or NO – Normal Open) for the EPO function via the LCD panel (see Section 9.3.6.1
General).
Logic Position Description
NC CN1.1 and CN1.2 EPO active when opened
NO CN1.1 and CN1.2 EPO active when closed
For normal UPS operation, keep pins 1 and 2 open. To enable EPO operation, close contact between pins 1 and 2. The default EPO setting is NO,
for normal UPS operation.
Note: Activating EPO shuts down the UPS system rectifiers, inverters and STS. The input power supply is not internally disconnected.
Control Panel Connection RS-232 Port
SNMP Card Slot
CN1
CN2
CN3
CN4
CN5
CN6
CN7
CN8
USB Port
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