External Plc Ii (Melsec Bus Connection); Names And Functions Of Each Section; Connection With Melsec - Mitsubishi Electric MELDAS 60 Series Maintenance Manual

12.2 External PLC II (MELSEC bus connection)

The Mitsubishi sequencer (MELSEC A Series) and MELDAS60/60S Series can be connected with a bus.
Up to four NC control units can be connected to one sequencer.
One NC unit occupies one stage (0 slot) of the sequencer extension unit. Refer to the sequencer and NC
system specifications for the number of stages that can be extended. This function is an option.

12.2.1 Names and Functions of Each Section

No.
(1)
(2)
(3)
(4)
Accessories
No cables, etc., are enclosed.
This card is mounted in the control unit's extension slot.

12.2.2 Connection with MELSEC

The MELDAS60/60S Series are handled as special extension units (32-point units) for the sequencer.
The following connection example is for when there is one extension stage. Refer to the connection
methods in the respective sequencer manual and connect with the NC control unit.
FCUA-R500/501
CAUTION
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12.2 External PLC II (MELSEC bus connection)
(3)
(1)
Connector name
CF51A MELSEC A bus connection connector (Basic base side)
CF51B MELSEC A bus connection connector (Extension base side)
CS Extension unit No. setting rotary switch (Setting stages: 1 to 7)
RTBUS NC dedicated bus connection connector
cable
(Open)
CF51B
CF51A
Incorrect connections could damage the device, so always connect the cable to the
designated connector.
Do not connect or disconnect the connection cables between each unit while the power is
ON.
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12. OPTION CARD
HR513 card
Function explanation
Ex.FCA64-B
CPU compatible with MELSEC bus connection
CS
A1S type
1
Max. No. of extension stages: One stage
Max. cable length
A A，A N，A U type
Max. No. of extension stages: Four stages
Note that the number of extension stages is
limited by the No. of CPU input/output points
and the power supply on the extension unit side.
Max. cable length
I-161
(2)
(4)
MELSEC base unit
MELSEC (Main base section)
MELSEC (Extension base section) MELSEC extension unit
(first extension stage)
(first extension stage)
: 6m
: 6m