Emerson Liebert ITA, Руководство пользователя

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52 Chapter 6 Communication
Liebert
®
ITA 16kVA And 20kVA UPS User Manual
Extended dry contact card
Except for the function of the UPS dry contact card, the extended dry contact card provides RS232 and RS485
communication function to support the JBUS/MODBUS (RTU) communication protocol, and provides four routes
analog acquisition function.
Refer to the corresponding user manual for the installation and operation guide.
6.2 Connection Cables For Dry Contact Port
The UPS provides five dry contact ports; see Figure 1-3 for the specific positions. The silkprints of the five dry contact
ports are 1, 2, 3, 4 and 5. The pin layout of each dry contact port is shown in Figure 6-2, and the port description is
shown in Table 6-1.
+12V +12V +12V
SA
LAR
M
GN
D
On_bat
tery
GN
D
On_by
pas
s
GN
D
E
po_N
C
+12V +12V
Epo_I
N
BFP_o BFP_s BFP_c
Dry contact port 1 Dry contact port 2 Dry contact port 3 Dry contact port 4 Dry contact port 5
Figure 6-2 Pin layout of dry contact ports
Table 6-1 Description of the dry contact ports
Silkprint Port name Pin NO. Pin name Meaning
1.1 S_ALARM The signal level is 12V when the system alarms
1 Output port of alarm
1.2 GND GND
2.1 ON_BATTERY
The signal level is 12V when the system runs in battery
inversion mode
2
Output port of battery
status
2.2 GND GND
3.1 ON_BYPASS The level is 12V when the system runs in bypass mode
3
Output port of bypass
status
3.2 GND GND
4.1 EPO_NC EPO activated when opened to 4.2
4.2 +12V EPO activated when opened to 4.1
4.3 +12V EPO activated when shorted to 4.4
4
Input port of remote
EPO*
4.4 EPO_IN EPO activated when shorted to 4.3
5.1 BFP_O
Bypass backfeed protection relay (normally open).
Closes when short circuit of bypass silicon controlled
rectifier (SCR) leads to backfeed
5.2 BFP_S
The middle point of the bypass backfeed protection
relay
5
Output port of bypass
reflected
5.3 BFP_C
Bypass backfeed protection relay (normally open).
Opens when shoft circuit of bypass SCR leads to
backfeed
Note*:
Pin1 and pin2, or pin3 and pin4 of the dry contact port 4 reserves the corresponding terminals for configuring the REPO function.
The REPO device also needs the shielded cable to connect to the normally open/closed remote REPO switch between the two
terminals. If not necessary, you should disconnect pin3 and pin4 of the dry contact port 4, or short pin1 and pin2 of the dry contact
port 4. Pin1 and pin2 of the dry contact port 4 have been shorted before delivery
Note
The EPO action of the UPS will close the rectifier, inverter and static bypass, but it cannot disconnect the UPS mains input inside.
If you want to disconnect the UPS completely, just disconnect the upstream input MCB when generating the EPO.