Hardware reference guide

Modbus Plus NOMs
282
35013379 02 October 2007
Specifications The Modbus Plus Head Single and Dual Channel modules provide extended
communication capabilities for the Quantum system within a Modbus Plus
configuration. The following table shows the specifications show the Modbus Plus
single and dual channel modules.
Specifications
Communication Ports
NOM21100 1 Modbus Plus network (RS-485) port (9-pin connector)
NOM21200 2 Modbus Plus network (RS-485) ports (9-pin connectors) for dual
connectivity on a single Modbus Plus network. These ports
handle identical versions of all inbound and outbound
transactions and keep track of the data paths used for these
transactions.
Both Modules 1 Modbus (RS-232) serial port (9-pin connector)
A bridge mode capability in the module permits a panel device
connected to this port to access nodes on the Modbus Plus
network or to access the local PLC directly without having to go
out onto the network.
Diagnostics Power Up Runtime
RAM RAM
RAM Address RAM Address
Executive Checksum Executive Checksum
Processor
Power Dissipation
(Typical)
4 W
Bus Current Required
NOM21100 780 mA
NOM21200 780 mA
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