Apc SILCON 10-40KW 400V UPS User Manual download pdf (Page 74)

74 Installation Guide APC Silcon 10-40kW 400V UPS

990-4050

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6.6 Remote Display

With the remote display unit data may be displayed at distances of up to 25 m from UPS. For

extended communication distance, see section 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 3.2 km normal RS232C signal levels must be

converted to a long distance communication standard. The converter must be placed outside

the UPS cabinet.

6.6.1 Extension of Remote Display Communication Distance

Remote display communicates with the UPS through a 3-wire RS232 interface. 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 1. Insert converters if longer distances are necessary,

or if communication cables are led through magnetically noisy areas. Converters must comply

with local regulations

Table 1: 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

Remote Display. The converter provides optical signal insulation. Both converter boxes must

be supplied by an uninterruptible power source.

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

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Apc SILCON 10-40KW 400V UPS User Manual Page 74