Rockwell Automation 1336T PLC Comm. Adapter, Series B, FRN 2.xx-3.xx - Manual (Page 24)

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Publication 1336 FORCE–5.13 –– September, 1998
The PLC Communications Adapter Board provides two channels (A
and B) for connecting to Allen–Bradley’s RIO or DH+ networks.
Each channel allows the 1336 FORCE to communicate directly with
or without a PLC and is independently programmable. With RIO
scanner, you do not necessarily need to communicate with the PLC.
To connect channel A or B of the PLC Communications Adapter
Board to the RIO and DH+ communications systems, you need to
use twinaxial cable. The connections are shown on the following
pages. The following table provides the information about the
twinaxial cable.
Cable: Description:
Type
Belden 9463. Consult Allen–Bradley if you use a
cable other than a Belden 9463.
Length
You need to use a minimum of 3.05 meters (10
feet) for all connections. Shorter lengths may
cause signal reflections.
Connections
You should connect all three conductors (Blue,
Shield, and Clear) at each wiring point. You
should not make any additional ground
connections to the shield.
Important: Do not use star type connections. You
may only connect two cables at any
wiring point on a series connected
application.
Terminations
Two 1770–XT or 150 Ohm (82 Ohm for 230K
baud) resistors are used for cable termination. Use
one at each end of the cable.
You can use the DIP switches that are on the PLC Communications
Adapter Board to configure one or both channels for DH+ or RIO
communications. Use switches U2 and U3 to configure channel A,
and switches U4 and U5 to configure channel B.
Chapter 2, Starting Up, provides information for setting the DIP
switches.
RIO Configuration for Both RIO Adapter and RIO Scanner
When you configure a communications channel for RIO connection,
the PLC Communications Adapter Board looks like a remote I/O
rack to an Allen–Bradley PLC or a PLC Communications Adapter
Board functioning as an RIO scanner.
Chapter 3, Using Remote I/O Communications, provides further
information about RIO adapter and RIO scanner modes.
Determining Your
Communications
Configuration
CHANNEL A
SHIELD
CHANNEL B
2
1
SHIELD
2
1
"
"