Mitsubishi Electric Melsec A Series - Page 9

1. INTRODUCTION
--------------------
MELSEC·A
Remote I/O
module:
•
1.
INTRODUCTION
This manual gives the system, specifications and handling of the A2CCPU,
A2CCPUP21 and A2CCPUR21 General-purpose Programmable Controller
(referred to as A2C in this manual).
The A2C is a building block type CPU module which can construct a system
including remote I/O modules (I/O modules) and remote terminal modules
(special-function modules)
(*')
without using a base unit.
The A2C uses the MELSECNET/MINI-S3 data link system
(*2)
(referred to as
MINI-53 in this manual) in place of a base unit for data communication with
the
remote I/O module and the remote terminal module
through
s-core flat
cables or twtsted-pair cables.
Using s-core flat cables,
the
system modules can be arranged close to each
other just as the building block type CPU is used.
Using twisted-pair cables, the system modules can be separated up to 100
meters (328.1
It)
away from each other
(*1.
This feature makes it possible
to install
the
remote I/O module and the remote terminal module to conform
with the arrangement of equipment to be controlled.
IREMARKsl
(1)
.1...
"Remote I/O module" and "remote terminal module" are general terms for the
mcdulee
mentioned below.
Input/output modules connectable to the A2C. Mitsubishl
general-purpose
inverter
FR~Z200
series,
MELSEC-F
series programmable controllers
Remote terminal
module:
Special function modules connectable to the A2C, RS-
232C
interface
modules
See Section
2.3
for names and types of the remote I/O modules and the remote
terminal modules.
(2)
*2
.,.
The MELSECNET/MINI-S3 data link system has been designed to reduce the amount
of wiring between the PC and equipment to be controlled. Since the PC, the remote
I/O module and the remote terminal module are connected with twisted-pair cables
or optical fiber cables, it is possible to install the remote I/O module and the remote
terminal module to suit with the arrangement of equipment to be controlled.
(3)
*3...
Distance allowed when twisted-pair cables of
0.5
mm
2
(20 AWG) or thicker are used.
The maximum allowable distance is 50 meters (164.1
tt)
when twisted-pair cables of
0.3
mm
2
(22 AWG) or thinner are used.
1
-1