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D-500 MK2 User Manual
4.1.4. RS-485 SLOT
Structure:
Connection:
Baud rate:
Data type:
Termination:
Isolation:
Common mode voltage:
Max distance:
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 Modbus register list is available at Datakom
technical support.
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.
RS-485 Slot
RS-485, isolated.
3 wires (A-B-GND). Half duplex.
2400-115200 bauds, selectable
8 bit data, no parity, 1 bit stop
External 120 ohms required
250VAC, 1 minute
-0.5 VDC to +7VDC, internally clamped by transient suppressors.
1200m @ 9600 bauds (with 120 ohms balanced cable)
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Firmware V-6.3
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