Mitsubishi Electric MELSEC-A/QnA Series User Manual

7 POSITIONING MODULE REPLACEMENT
7 - 40
7.5.5 Interface specifications comparison with external devices
For the external interface specifications, the following shows the differences between AD75M and
QD75M.
(1) Comparison of electrical specifications
: Compatible, : Partial change required
* The column of interface specifications differences is described as the form, [Specifications of AD75M]  [Specifications of
QD75M].
(2) Comparison of connector signal sequence
When using with QD75M, change the connector and wiring.
*1 The following shows comparisons about manual pulse generator A phase/B phase.
*2 With the QD75M, the "external start signal" and "speed-position switching signal" are combined into the "external
command signal/switching signal".
Item Differences as Interface specifications*
compati-
bility
Precautions for replacement
Input
Upper/lower limit signal
OFF current: 1.5mA1.0mA
Input resistance: 4.7k6.8k
Check whether the OFF current value met
satisfied values
Stop signal
OFF current: 1.5mA1.0mA
Input resistance: 4.7k6.8k
Check whether the OFF current value met
satisfied values
Near-point dog signal
OFF current: 1.5mA1.0mA
Input resistance: 4.7k6.8k
Response time: 4ms1ms
Check whether the OFF current value met
satisfied values
Speed-position switching signal
OFF current: 1.5mA1.0mA
Input resistance: 4.7k6.8k
Response time: 4ms1ms
Check whether the OFF current value met
satisfied values
Manual pulse generator
ON current: 3.5mA1.0mA
Input resistance: 1.5k1.2k
Name
AD75M QD75M
Logic
(Initial setting)
Logic switching by
parameter
Logic
(Initial setting)
Logic switching by
parameter
Manual pulse generator A phase
Manual pulse generator B phase
*1
Negative logic
(multiple of 4)
Not allowed
Negative logic
(multiple of 4)
Allowed
Near-Point signal Negative logic Not allowed Negative logic Allowed
Stop signal Negative logic Not allowed Negative logic Allowed
Upper limit Negative logic Not allowed Negative logic Allowed
Lower limit Negative logic Not allowed Negative logic Allowed
External start
*2
Negative logic Not allowed
Negative logic Allowed
Speed-position switching signal
*2
Negative logic Not allowed
AD75M QD75M
No. of connection 1 generator/axis 1 generator/module
Mode change (Parameter) Not allowed
Allowed
1 x mode, 2 x mode,
4 x mode, PLS/SIGN mode

Mitsubishi Electric MELSEC-A/QnA Series Specifications

General

Brand	Mitsubishi Electric
Model	MELSEC-A/QnA Series
Category	Controller
Language	English