User`s manual

Input/output module specifications Specifications
MELSEC System Q, Hardware 12 – 23
12.3.13 Digital input module QX72

The response times OFF –> ON and ON –> OFF can’t be set to different values.
Item QX72
Number of input points 64
Isolation method Photocoupler
Rated input voltage 5 V and 12 V DC (+20/–15 %, ripple ratio within 5 %)
Rated input current at 5 V DC: approx. 1.2 mA
at 12 V DC: approx. 3.3 mA
Max. simultaneously ON All inputs can be switched on simultaneously.
Inrush current —
ON voltage/ON current
≥ 3.5 V DC / ≥ 3 mA
OFF voltage/OFF current
≤ 1 V DC / ≤ 0.1 mA
Input impedance approx. 3.3 k
Ω
Response time
OFF
→ ON 1, 5, 10, 20, 70 ms
(Response time setting by parameters, initial setting: 10 ms)

ON → OFF 1, 5, 10, 20, 70 ms
(Response time setting by parameters, initial setting: 10 ms)

Groups of input 2; 32 points/common
(common terminal: 1B01/1B02 and 2B01/2B02)
Input status display One LED per input of a group, Groups are switchable
Dielectric withstand voltage 560 V AC rms/3 cycles (altitude 2000 m)
External connections Two 40-pin connectors
Applicable wire size
0.3 mm
2
Accessories External wiring connector
Internal current consumption
(5 V DC)
85 mA (all input points ON)
Weight 0.13 kg
External connections
Tab. 12-22: Input module QX72
Internal circuit
LED
1B20
For open collector (positive
common) connection
For sensor (negative
common) connections
For TTL, LS-TTL, CMOS buffer
(positive common) connections
1B02
1B20
1B02
1B01
1B02
1B20
5/12 V DC
Indication selector switch
Used to switch the LED
indications:
F: Inputs X00 to X1F
L: Inputs X20 to X3F
F
L
Input module
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