Omron H7EC Manual page 7

PNP/NPN Universal DC Voltage Input Model Without Backlight
1. Contact Input (Input by a Relay or Switch Contact)
Relay
Input
Reset
or Switch
2. Solid-state Input
Open collector of a
PNP transistor
Input
Reset
or Open collector of an
NPN transistor
Note: 1. Terminals 2 and 4 (input circuit and reset circuit) are
functionally isolated.
2. Select input transistors according to the following:
Dielectric strength of the collector ≥ 50 V
Leakage current < 100 µA
AC/DC Multi-voltage Input Model
Relay
Reset
Input
or Switch
Relay
or Switch
Open collector of a
PNP transistor
or Open collector of an
NPN transistor
Relay
or Switch
or Open collector of
an NPN transistor
Note: Select input transistors according to the following:
Dielectric strength of the collector ≥ 50 V
Leakage current < 1 µA
No-voltage Input Model
1. Contact Input (Input by a Relay or Switch Contact)
Relay
Input
Terminals 2 and 4 are
internally connected.
or Switch
Note: Use Relays and Switches that have high contact reli-
ability because the current flowing from terminals 1 or
3 is small. It is recommended that OMRON's G3TA-
IA/ID be used as the SSR.
2. Solid-state Input
(Open Collector Input of an NPN Transistor)
Open collector of an
NPN transistor
Input
Terminals 2 and 4 are
internally connected.
Note: 1. Residual voltage in the output section of Proximity
Sensors or Photoelectric Sensors becomes less than
0.5 V because the current flowing from terminals 1 or 3
is small thus allowing easy connection.
2. Select input transistors according to the following:
Dielectric strength of the collector ≥ 50 V
Leakage current < 1 µA
Self-powered Total Counter
Relay
Reset
or Switch
Open collector of an
NPN transistor
Reset
or Switch
H7EC
C-13