Installation guide

63Installation Guide Silcon DP300E Series 480V 120-160kVA
7OH0006 US rev. 03
Options/Accessories
5.7 Remote display
5.7.1 Introduction
The remote display unit provides the Silcon DP300E series with the possibility to
display condition data at remote sites of up to 25 meters away from the Silcon
DP300E unit. For extension of communication distance, see section 5.7.1.1 below.
The remote display can easily be connected to the Silcon DP300E series via the serial
communication ports on the communication interface.
To obtain a transmission distance of 3.2 km the normal RS232C signal levels of the
serial in/out port must be converted to a 20mA current loop. The RS232C/20mA
converter must be placed outside the Silcon DP300E cubicle.
5.7.1.1 Extension of communication distance for remote display
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 pole
female connector. The communication speed is 9,600 bps.
The communication distance is rather limited, see Table I. If a longer distance is
necessary or if the communication cable goes through magnetic noisy areas, it is
necessary to insert converters. Table 1 gives examples of three ways of increasing the
communication distance. All converters must be locally purchased.