Mitsubishi Electric AnyWire DB A20, Handbook

Page: 43 / 80

6
REPLACING THE I/O MODULES
6
- 10
(5) Comparisons between AJ55TB3-16D and A20SB-16UD
: Compatible, : Partially changed, ×: Not compatible
*1 For the negative common type, use A20SB-16USD.
*2 Check the specifications of the sensors or switches to be connected to the A20SB-16UD.
Specifications AJ55TB3-16D A20SB-16UD
Compat-
ibility
Precautions for
replacement
Number of input points 16 points 16 points
Insulation method
External input
↔
Internal circuit:
Photocoupler
Internal circuit ↔ Transmission circuit:
Not insulated
External input
↔
Internal circuit: Not insulated
Internal circuit ↔ Transmission circuit:
Photocoupler
The insulated locations are
different.
Input type Positive/negative common shared type Positive common type
A negative common type
cannot be used.
*1
Rated input voltage 24VDC 24VDC
Rated input current Approx. 7mA Approx. 7mA
Operating voltage range
19.2 to 26.4VDC
(ripple ratio within 5%)
21.6 to 27.6VDC
(ripple voltage 0.5Vp-p or less)
Operating voltage range is
different.
Maximum simultaneous on
input point
100% 100%
ON voltage/ON current 14VDC or higher/3.5mA or higher 16VDC or higher/5.5mA or higher
ON voltage and ON current
are increased.
*2
OFF voltage/OFF current 6VDC or lower/1.7mA or lower 8VDC or lower/2mA or lower
OFF voltage and OFF current
are increased.
*2
Input resistance Approx. 3.3k

Approx. 3.3k

Response
time
OFF

ON 10ms or less 1ms or less
ON

OFF 10ms or less 1ms or less
Common terminal
arrangement 8 points per common
(3-wire type terminal block)
16 points per common
(3-wire type terminal block)
The A20SB-16UD changes
from 2 commons to 1
common.
Operation indicator ON indication (LED) ON indication (LED)
External wiring method
40-point terminal block (M3 screw)
Transmission circuit included
40-point terminal block (M3 screw)
Transmission circuit included
Wiring must be changed.
Existing wires can be used but
applicable crimping terminals
are different.
For details, refer to Section
6.3.
Applicable wire size
0.75 to 2mm
2
0.3 to 1.25mm
2
(when the following applicable crimping
terminals are used: 0.75 to 2mm
2
)
Applicable crimping
terminal
1.25-3, 1.25-YS3A,
2-S3, 2-YS3A
V1.25-3, V1.25-YS3A,
V2-S3, V2-YS3A
For wire sizes 0.75 to 2mm
2
R2-3SL, RAV2-3SL, RAP2-3SL,
VD2-3S, VD2-3.5SS, VD2-3.5S,
VDAV2-3.5SS, VDAV2-3.5S
I/O module
power
supply
Voltage 15.6 to 27.6VDC
21.6 to 27.6VDC
(ripple voltage 0.5Vp-p or less)
Operating voltage range is
different.
Current 60mA 233mA
Because the current
consumption has increased,
the current capacity must be
reviewed.
External dimensions 50(H) × 177(W) × 66(D) mm 40(H) × 190(W) × 60(D) mm The shape is different.
Installation method
Screw mounted Screw mounted ×
Because mounting hole size is
different, reworking is
required.
Mounted to DIN rail Mounted to DIN rail
The A20SB-16UD can be
mounted to the existing DIN
rail.
Weight 0.4kg 0.24kg