DH+/RIO OPTICAL COMMUNICATION MODULES USERS MANUAL
Copyright © 2003 by Phoenix Digital Corporation, All Rights Reserved.
1-14
1.3.1.2 1746 PLUG-IN OLC AND 1756 PLUG-IN OCX J2 CONNECTOR
PIN DESIGNATIONS (CONNECTOR ON BOTTOM OF MODULE)
OLC/OCX J2 Connector
Pin Numbers
(1)
DH+/RIO Signal Name
1
(2, 3)
Serial 1/Clear (DH+), Serial 2/Clear (RIO)
2
Shield
3
(2, 3)
Serial 2/Blue (DH+), Serial 1/Blue (RIO)
(1) J2 Connector Orientation on the bottom of OLC and OCX modules is front to back, Pin #s 1 thru 3
respectively. See Figures 5 and 6 for J2 Connector Designations.
(2) Each end of each hardwired DH+ or RIO network stub (wire connection made to the OLC/OCX J2
connector) must be terminated with either an 82 ohm, 5%, 1/4 watt resistor (230 K baud and Remote I/O
“Extended Node” networks), or a 150 ohm, 5%, 1/4 watt resistor (57.6 K baud and 115.2 K baud networks,
excluding “Extended Node” RIO networks). (External 82 ohm and 150 ohm termination resistors are
provided with every OLC and OCX module.)
If the OLC or OCX is used as a fiber optic repeater and is not connected to any Rockwell devices, then it
should have the J2 Connector Local Interface disabled. See Interactive Diagnostics in Section 1.3.3 for
more information.
(4) All of the DH+ and RIO devices on each hardwired nework stub must be interconnected Serial 1 to Serial 1
and Serial 2 to Serial 2. Cross-connecting Serial 1 to Serial 2 will cause communication failures. Consult
Rockwell DH+ and RIO Network Installation Guidelines for more information on correct network
installation and wiring procedures.
OLC and OCX DH+/RIO DEVICE INTERFACE CONNECTOR PIN DEFINITIONS
TABLE 3
