Connections
■ Terminal Arrangement
Bottom view: View of the Time Counter rotated horizontally 180°
Backlight Model
No-backlight Model
New H7ET
Backlight
24 VDC
Timer
input
Reset
input
■ Connections
Timer
input
Reset
input
H7ET Time Counter
PNP/NPN Universal DC Voltage Input Model With Backlight
1. Contact Input (Input by a Relay or Switch Contact)
2. Solid-state Input
Relay
Input
Backlight
24 VDC
Reset
Relay
Open collector of a
PNP transistor
Input
Open collector of a
Backlight PNP transistor
24 VDC
Reset
or Switch
or Switch
or Open collector of an
NPN transistor
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 ≥ 50 V
Leakage current < 1 µA
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