Mitsubishi Electric A173UHCPU User Manual page 45

1. SPECIFICATIONS OF MOTION SYSTEM COMPONENTS
(3) Selection of base units and extension cables
(a) Selection of main base unit
Choose the main base unit according to the number of pulse
generator/synchronous encoder interface modules (A172SENC) and limit output
modules (A1SY42) fitted to the main base (number of motion slots) and the
number of sequencer I/O slots (number of sequence slots).
Main Base Model
A172B
A175B
A178B
A178B-S1
A178B-S2
A178B-S3
(b) Selection of sequence extension base unit and extension cable
Choose the sequence extension base according to the number of MELSEC-A
series I/O modules fitted to the sequence extension base unit.
Selection of sequence Extension Base Unit
Extension Base Unit
Model
A1S65B
A1S68B
A168B
Choose the extension cable according to the distance between the main base
unit and sequence extension base unit and the type of the sequence extension
base unit. Note that the overall distance should be within 3m (9.84ft.).
Extension Cable
Model
55 mm (2.17 inch), flat cable for horizontal
A1SC01B
extension
A1SC03B 330 mm (13 inch)
A1SC07B 700 mm (27.58 inch)
A1SC12B 1200 mm (47.28 inch)
A1SC30B 3000 mm (118.2 inch)
A1SC60B 6000 mm (236.4 inch)
A1SC05NB 450 mm (17.73 inch)
A1SC07NB 700 mm (27.58 inch)
A1SC30NB 3000 mm (118.2 inch)
A1SC50NB 5000 mm (196.9 inch)
POINT
Choose the motion modules and MELSEC-A series I/O modules so that the
sum of 5VDC consumed currents of the CPU module, motion modules,
MELSEC-A series I/O modules, synchronous encoders and manual pulse
generators connected to the main base unit is within 5 (A) for the
A173UHCPU/A172SHCPUN or 3 (A) for the A171SHCPUN.
Selection of Main Base
No. of Motion Slots
(No. of A172SENCs and A1SY42s)
1
1
1
2
4
8
MELSEC-A Series I/O Modules
For extension power supply + 5 slots, applicable to system with up
to one extension base.
For extension power supply + 8 slots, applicable to system with up
to one extension base.
For extension power supply + 8 slots, applicable to system where
up to one extension base and GOT are bus-connected.
Selection of Extension Cable
Length mm (inch)
1 − 33
No. of Sequence Slots
1
4
7
6
4
0
Type of Sequence
Extension Base Unit
For A1S6 B/A168B
For A6 B