Mitsubishi FX2N-10GM Hardware / Programming Manual page 59

FX Series Positioning Controllers
Selecting DC input device
Example: Following products manufactured by OMRON
Micro switch:
Operation switch: A3P
Imperfect contact may occur when a switch for large current is used.
Input device with diodes connected in series
Make sure that the voltage drop of the diodes connected in series is approximately 4 V or less.
Accordingly, in the case of a lead switch with LEDs connected in series, two or less LEDs can
be connected in series.
Input device with resistors connected in parallel or two-wired proximity switches.
Make sure that the parallel resistance Rp is 15 kΩ or more.
When Rp is less than 15 kΩ, connect a bleeder resistor Rb satisfying the following formula
between the [24+] and [IN] terminals.
Make sure that the leak current I is 1.5 mA or less when the two-wired proximity switch is
turned OFF.
When I exceeds 1.5 mA, connect a bleeder resistor Rb satisfying the following formula in the
same way.
Z, V, D2RV Proximity switch:
Photoelectric switch:E3S, E3N
Rb ≤
15-Rp
Rb ≤
I - 1.5
TL, E2M
4Rp
(kΩ)
6
(kΩ)
Wiring 3
3-7