RayTek MI Miniature Infrared Sensor - Manual (Page 39)

Installation
MI 31
5.6 Installing of Multiple Sensors via RS485
The distance between the sensor and a computer can be up to 1200 m
(4000 ft.) via RS485 interface. This allows ample distance from the
harsh environment where the sensing head is mounted to a control
room or pulpit where the computer is located.
The RS232/485 adapter comes with a power supply:
RAYMINCONV2 for 230 VAC
RAYMINCONV1 for 110 VAC
Connect the signal line as shown:
RS232/485 Adapter Electronic Box
RxB
Æ
B
RxA
Æ
A
Do not run power supply in the same conduit as the
RxA/RxB wires!
Figure 21: Wiring the RS485 Interface
Shunt deactivated!