User manual

890 USE 145 00
512/612 Modicon Micro PLCs
29
User-selectable High-speed Counter/interrupt Inputs
Electrical Characteristics
ON level 15 ... 30 VDC
OFF level 0 ... 5 VDC
Minimum ON state input 6 mA @ 24 VDC
Maximum OFF current 0.7 mA @ 5 V
Input impedance 15.8 kW when OFF
1.95 kW when ON @ 24 VDC
Current draw 12.3 mA @ 24 VDC
Typical impedance curve
+5 V
10 V
15 V
20 V
25 V
0 mA 2 mA 4 mA 6 mA 8 mA 10 mA 12 mA 14 mA
INPUT VOLTAGE
Note We recommend the use of three-wire proximity switches on these inputs.