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B7A Interface Unit Section 3-7
3-7 B7A Interface Unit
3-7-1 Overview
The B7A is a 1:1 transmission path that does not require a master. A total of
16 signals are transmitted using a two-conductor or three-conductor VCTF
cable (maximum length: 500 m). The CJ1W-B7A@@ B7A Interface Unit is a
CJ-series Basic I/O Unit that exchanges up to 64 points of I/O data mainly
with B7A Link Terminals using a B7A transmission path.
The B7A Interface Unit and B7A Link Terminal can be used in the same way
as a standard Basic I/O Unit and I/O Terminal without any need to worry about
communications. This characteristic reduces the wiring when using more than
one relatively remote sensor or actuator.
3-7-2 System Configuration
3-7-3 Models
Note 1. A 10-point B7A Link Terminal cannot be connected to a B7A Interface Unit.
B7A Interface Units can be connected together.
2. Wireless transmissions are possible if B7AP Power Couplers are used on
a B7A transmission path, reducing the wiring required for moving objects
and rotating objects.
B7A Interface Unit Specifications I/O words allocated
to Unit
Connectable B7A Link Terminals
(See note 1.)
CJ1W-B7A14 64 inputs
(four B7A ports)
4 input words Inputs: Four 16-point Input Terminals, two 32-
point Input Terminals, or two 16-point Input
Terminals and one 32-point Input Terminal
CJ1W-B7A04 64 outputs
(four B7A ports)
4 output words Outputs: Four 16-point Output Terminals or
two 32-point Output Terminals
CJ1W-B7A22 32 inputs, 32 outputs
(four B7A ports)
2 input words and
2 output words
Inputs: Two 16-point Input Terminals or one
32-point Input Terminal
Outputs: Two 16-point Output Terminals or
one 32-point Output Terminal
or
Two Mixed I/O Terminals
(16 inputs/16 outputs)
CJ1W-B7A@@
B7A Interface Unit
Three-conductor VCTF
connecting cable × 4
Power
Supply
Unit
CJ-series
CPU Unit
12 to 24 V DC power supply
(when using a common power supply)
B7A Link Terminals
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