Omron H7E Manual page 14

Connections
■ Terminal Arrangement
Bottom view: View of the Time Counter rotated horizontally 180
Backlight Model
Backlight
24 VDC
Timer Reset
input input
■ Connections
H7ET Time Counter
PNP/NPN Universal DC Voltage Input Model With Backlight
1. Contact Input (Input by a Relay or Switch Contact)
Relay
Input
or Switch
C-20
Self-powered Time Counter
No-backlight Model
Timer Reset
input input
Relay
Backlight
24 VDC
Reset
or Switch
H7ET
2. Solid-state Input
Open collector of a
PNP transistor
Input
or Open collector of an
NPN transistor
Note: 1. Terminals 2 and 4 (input circuit and reset circuit) are func-
tionally isolated.
2. Select input transistors according to the following:
Dielectric strength of the collector
Leakage current < 1 A
Note: *Recommended power supply; eg. OMRON S8VS
Open collector of a
PNP transistor
Backlight
24 VDC*
Reset
or Open collector of an
NPN transistor
50 V