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Installation Guide APC Silcon 240-320kW 480V UPS 65
6.4 Remote Display
With the remote display unit data may be displayed at distances of up to 25m from UPS. For
extended communication distance, see below.
Remote display may easily be connected to UPS via one of the two serial communication ports
on the communication interface board.
To obtain a transmission distance of up to 3.2km normal RS232C signal levels must be
converted to a long distance communication standard. The converter must be placed outside
the UPS cabinet.
6.4.1 Extension of Remote Display Communication Distance
The remote display communicates with the UPS through a 3-wire RS232 interface. The remote
display is a DTE (Data Terminal Equipment) employing a SUB-D 9-pin female connector.
Communication speed: 9600 bps.
For communication distances, see table below. Insert converters if longer distances are
necessary, or if communication cables are led through magnetically noisy areas. Converters
must comply with local regulations
Remote Display Communication Extensions
Two converter boxes are required for a communication distance extension: One
box near the UPS for the conversion from RS232C to a long distance communication standard,
and another box at the other end to convert back to RS232C, which is to be connected to the
Standard
(RS232)
Short-haul
Modem Async
Max. distance 80/25 ft/m 10000/3200 ft/m
Converter Manufacture
Art. Code
No converter BLACK BOX
ME800A-R2
RS232 BLACK BOX connector Sub-D 25-pin female
BLACK BOX interconnector 4-screw terminal