Advantech 5000 Series - Manual (Page 25)

Installation Guideline
INIT* is used for changing baud rate and checksum. COM is provided
as reference to the RS-485 ground signal. DATA+ and DATA- are
provided for the RS-485 twisted pair connection.
Figure 2-7 ADAM-5000 Wiring Connections
I/O Module Wiring
The system uses plug-in screw terminal blocks for the interface
between I/O module and field devices. The following information
must be considered when connecting electrical devices to I/O modules.
1. The terminal block accepts 0.5 mm 2 to 2.5 mm 2 wires
2. Always use a continuous length of wire, do not combine wires to
attain needed length
3. Use the shortest possible wire length
4. Use the wire trays for routing where possible
2-10 ADAM-5000