Datakom D-700 MK3, User Manual

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D-700 MK3 User Manual Firmware V-16.8
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Structure: RS-485, isolated.
Connection: 3 wires (A-B-GND). Half duplex.
Baud rate: 2400-115200 bauds, selectable
Data type: 8 bit data, no parity, 1 bit stop
Termination: External 120 ohms required
Isolation: 250VAC, 1 minute
Common mode voltage: -0.5 VDC to +7VDC, internally clamped by transient suppressors.
Max distance: 1200m @ 9600 bauds (with 120 ohms balanced cable)
The RS-485 port features MODBUS-RTU protocol. Multiple modules (up to 128) can be paralleled on the
same RS-485 bus for data transfer to automation or building management systems.
The RS-485 port provides also a good solution for distant PC connection where RainbowPlus program
will enable programming, control and monitoring.
For more details about programming, control and
monitoring through RS-485 port please refer to
RainbowPlus user manual.
The Modbus register list is available at Datakom
technical support.
4.6.5. RS-485 MODULE
RS-485 Module