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11.0 C
OMMUNICATIONS
11.1
Communications Interface Port
The RT 10Kva UPS has a standard DB-9 serial port female connector located on
the rear of the UPS unit. Several signals are provided on this port and are assigned as follows:
Table 2
DB-9 pin assignment
DB-9
Assignment Description
Pin
1
Low Battery (open collector)
2
UPS TxD (typical RS-232 levels)
3
UPS RxD (typical RS-232 levels)
4
Remote Shutdown (5-12VDC, 10-24mA max; battery operation)
5
Common
6
Remote Shutdown (short to pin 5); all modes of operation
7
Low Battery (open emitter)
8
Utility Fail (open emitter)
9
Utility Fail (open collector)
Pin Assignment
6
7
1
2
* Maximum voltage and current on pins 1, 7, 8 and 9 are 60VDC and 10.0 mA
11.1.1 DB-9 Interface Port
Using the following directions to attach the smaller enclosed ferrite
bead clamp to the communication cable as shown at right:
1. Open the ferrite bead.
2. Place the communication cable inside the ferrite bead groove.
3. Position the ferrite bead as close as possible to the end of the cable
that connects to the DB-9 connector of the UPS.
4. Close the ferrite bead so that the ferrite bead's case snaps closed
with the cable routed through the ferrite bead's case.
11.1.2 Communications—SNMP adapter - SNMP WEB CARD
Attach the larger enclosed ferrite bead clamp to the network
cable, see illustration at right, using the following directions:
1. Open the ferrite bead.
2. Place the network cable inside the ferrite bead groove.
3. Wrap the cable once around the ferrite bead.
4. Position the ferrite cable as close as possible to the end of
the cable that connects to the UPS.
5. Close the ferrite bead so that the ferrite bead's case snaps
closed with the cable routed through the ferrite bead's case.
8
9
3
4
5
Collector to Emitter*
Open
(+)
Collector
330 Ohms
Open
(-)
Emitter
Wrap network
cable around
ferrite bead
24
Communications
Run cable
through ferrite
bead case
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Troubleshooting
