3 Configuration Units
3-26
NJ-series CPU Unit Hardware User’s Manual (W500)
3-5 B7A Interface Ports
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.
* A 10-point B7A Link Terminal cannot be connected to a B7A Interface Unit. B7A Interface Units can be connected together.
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.
3-5-1 Overview
3-5-2 System Configuration
3-5-3 Models
B7A Interface
Unit
Specifications
I/O words allo-
cated to Unit
Connectable B7A Link Terminals
*
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
NJ-series
CPU Unit
12 to 24 V DC power supply
(when using a common power supply)
B7A Link Terminals
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