2.6. Connect OIT to PLC/Host
Each PLC/host supported by Maple Systems has its own wiring requirements.
Maple Systems offers pre-constructed OIT-to-PLC communication cables for
most PLCs. Most cables are available for same day shipment from Maple Systems.
They are built and tested for high reliability and are strongly recommended. Maple
Systems also builds custom cables—contact the factory for information.
Components and instructions necessary to construct your own OIT-to-PLC
communication cables are also available. Refer to Maple Systems’ Price List or
web site (www.maple-systems.com).
NOTE:
Refer to the ASCII Slave Protocol Guide or the STEP1 Protocol Operation
Manual for information on constructing OIT-to-ASCII host communication cables.
STEPS
1. Connect the DE9P plug end of the communication cable to Port 1 on the
OIT, which is the port nearest the power connector.
2. Tighten the cable screws to ensure that the cable remains attached to the OIT.
3. Route the communication cable to the PLC/host. Refer to the “OIT Cable
Routing” section for more information.
4. Connect the other end of the cable to the PLC/host and tighten the cable screws.
12
OIT3200/3250
1010-0081A, REV 04
Case GND
-
POWER SUPPLY
+
Communication Cable
Specific for the PLC/host
PLC/HOST
Port 1
DE9P
Output
Tighten
Control Panel
Tighten
Cover
OIT
Port 2
OIT
Figure 8 OIT3200/3250 PLC Connection
PIN#
FUNCTION
1
RXD-
2
RXD
3
TXD
4
RXD+
5
RETURN
6
TXD-
7
RTS
8
CTS
9
TXD+
Figure 9 Port 1 Pin Outs
