3.2 Wiring Connections
The CDU-AC5 is provided with a series of two part screw wiring terminals and a RJ-45 data
connection. In addition, there is a DB-9 communication port for connection to a GSM modem
and several other connections which are not utilised.
Front View
Rear View
1 CDU LonWorks Data Port.
The LonWorks data port provides connection to the local CDUs via a polarity
independent twisted pair.
2 RJ-45 10/100 BaseT Ethernet Port.
The RJ-45 connector must be used with a RJ-45 male connector and a suitable
Category 5 or Category 6 data cable connected to a 10BaseT or 100BaseT channel.
On power-up, the CDU-AC5 will automatically adjust to the speed of the data port.
4 RS-485 MODBUS Port.
Two part screw terminal, for connection to MODBUS master device. +,- and GND
signals available.
5 DB-9 RS232 Serial Port.
Standard serial port for connection to optional GSM modem.
6 24Vac power supply terminal
Two part screw terminal for connection to 24Vac power supply.
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