CJ-20 Central Unit

Name: CJ-20
Brand: IEL

Central communication unit for connecting local terminals with a supervision and control centre.

The CJ-20 central unit is used for communication between local terminals and a control centre. Through RS485/RS232 communication and the MODBUS protocol it connects devices such as UST terminals, measuring terminals, alarm monitors and protection relays to a superior system, with support for several standard protocols.

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Eight communication ports

Ports are used for communication with superior and subordinate systems.
Local terminal integration

Supports UST, MT, AM, NR and other local terminals through RS485 and MODBUS RTU.
Multiple control-centre protocols

Supported protocols include MODBUS RTU/TCP, ADLP, IEC 60870-5-101/B and IEC 60870-5-104.
Store & forward

Collected data is stored and grouped in internal fields.
Time synchronisation

Time is synchronised after receiving a message from the remote-control centre.
CJ-DIALOG parametrisation

Communication and local-terminal parameters are configured with CJ-DIALOG.

Number of communication ports: 8
Communication with local terminals: RS485, MODBUS RTU
Communication with control centre: RS485/RS232, radio, telephone or optical link
Software: CJ-DIALOG
Emulation: DS802/DS803 remote terminal station
Diagnostics: diagnostic functions and store & forward