CODEL
Operation and Maintenance Manual
Issue : A Rev. : 3 Date : 13/11/2018 Ref. : 100351
P a g e | 29
7 Data Communication
7.1 Hardware Configuration
7.1.1 System
The PSU supplies power to the TunnelTech 500. The current and relay outputs of the TunnelTech 500
communicate measurement data to the tunnels' DCS system.
Figure 14: Tunnel Tech 500 Series - system configuration
PSU
Slave
Display PCB
Master
mA 2
mA 1
E-Cell
Current Outputs
and Relays
Current Outputs
and Relays
PC
RS485
RS485