Remote-Control Connection; Physical Remote Control - Vexve Hydrox HCU Remote Installation, Operation And Maintenance Instructions

8. Remote-control connection

8.1. Physical remote control

All important signals in the Hydrox HCU Remote have a duplicate signal available for connection to a
remote-control system. All remote I/O connections are made directly to terminal block X3. These connec-
tions can be divided into three different categories: inputs, outputs and analogue outputs. Digital inputs
are only available when the electrical cabinet selector switch is in the remote operating position. Outputs
are always available in the remote control system, which means that the status of the valves can be moni-
tored remotely during local control.
Digital inputs are connected to outputs in the remote-control system. Those outputs activate operations
locally when connected to the appropriate inputs. Figure 27 shows how these connections should be
made.
x3 1 2
Figure 27. Remote input terminal connections
Digital outputs are connected to inputs in the remote-control system. Those inputs receive information
regarding the state of the local system when connected to the appropriate outputs. Figure 28 on next
page shows how these connections should be made.
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Remote System
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