*
The power connector on the BLU300 Series is a terminal block with wire clamps. Lugs are not
required.
Connect the OIT to the PLC
Each PLC supported by Maple Systems has its own wiring requirements. Maple Systems offers OIT-to-PLC communication
cables for most PLCs that are built to any length and tested for high reliability. Most cables are available for next-day
shipment from Maple Systems. Components and instructions necessary to construct your own OIT-to-PLC communications
cables are also available. Refer to Maple Systems’ website.
Port 1
RS-232/RS422
Port 2
RS-485
Pin #
Function
Pin #
Function
1
(no connection)
+
RXD+/TXD+
2
RXD
-
RXD-/TXD-
3
TXD
4
(no connection)
5
GND
6
RX (+)
7
RX (-)
8
TX (+)
9
TX (-)
Pinout for the OIT Ports
Selecting RS-422 or RS-485:
• Remove battery cover on rear cover and set dip switches as follows:
RS-485
RS-422
1-4 (on)
1-4 (off)
5-8 (off)
5-8 (on)
1010-0300, Rev 02
12
Blue Series Installation & Operation Manual