INSTALLATION
17
2
Figure 17 shows a multidrop configuration with DS2400 scanners connected to a
Multiplexer.
max 2 m
DS2400
# x
(up to 31)
DS2400
# 1
DS2400
# 0
RTX485 +
RTX485 -
RTX485 -
RTX485 +
Three wires +
shield
120 Ohm
120 Ohm
CHASSIS
SGND
max 1200 m
RS485 REF
SHIELD
MULTIPLEXER
Figure 17 - DS2400 Multidrop connection to a Multiplexer
20 mA Current Loop Interface (INT-22 Accessory Only)
When the INT-22 accessory board is installed, the DS2400 is equipped with a 20 mA
passive current loop interface.
The following pins of the 25-pin connector are used:
Pin Name Function
5 CLIN- current loop input -
3 CLIN+ current loop input +
4 CLOUT- current loop output -
2 CLOUT+ current loop output +
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