ClimaCheck Gateway NX400 Hardware Manual
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2020-03-26 Page 40 of 41
5.6
Modbus RS485 terminal
The Gateway has two RS485 terminals (RS485-1 and RS485-2). The primary interface will always
be a MODBUS RTU master, see section 4.7.1.
For the fixed installed ClimaCheck Online hardware, connections are made directly to screw
terminals on the Gateway, see Figure 32.
Figure 32, RS485 terminals on NX400
For the portable ClimaCheck Onsite PA Pro III, the RS485-1 is connected to a D-Sub contact in the
panel, see Figure 33. Connections to RS485-2 is done directly to the screw terminals.
Figure 33, RS485-1 connections in D-sub