User Instructions

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3.4 Installation of the interface.
1. Lead the cable of the RS485 bus through the cable gland and the appropriate hole in the enclosure and then
connect to the RS485 connector of the interface. The A+, B- cables should be connected the same way as the
rest of devices (A+ to A+, B- to B-) In the case of shielded wires, the shield should be connected to the SG
signal ground terminal.
2. Optionally, mount the 120 Ohm terminal resistors at the end of the RS485 bus.
3. Lead the Ethernet cable through the cable gland and the appropriate hole in the enclosure and then clamp the
RJ45 plug. Next, plug the cable in the RJ45 socket of the interface. Plug the other end of the twisted pair in the
RJ45 socket of the router, usually marked as ‘LAN’.
4. Lead the power supply cable through the cable duct and the appropriate hole in the enclosure and then
connect it to the ‘Power’ power supply connector. The power source should supply a voltage in the range of
10÷30 V D e.g. drawn from a PSU of the PSBEN or EN54 series. The best solution is to use a PSU that is
plugged into the RS485 bus and located close to the interface.
Fig. 3. The interface view with wiring description.