Omron H7EC Manual page 22

Connections
I Terminal Arrangement
Bottom view: View of the Tachometer rotated horizontally 180°
Backlight Model
Backlight
24 VDC
Pulse
input
I Connections
H7ER Tachometer
Note: Select input transistors according to the following:
Dielectric strength of the collector ≥ 50 V
Leakage current < 100 µA (1 µA for no-voltage input model)
PNP/NPN Universal DC Voltage Input Models With Backlight
Transistor Input
Open collector of Open collector of
or
an NPN transistor an PNP transistor
PNP/NPN Universal DC Voltage Input Models Without Backlight
Transistor Input
Open collector of Open collector of
or
an NPN transistor an PNP transistor
C-28
Self-powered Tachometer
No-backlight Model
Pulse
input
Backlight
24 VDC
Input
Input
H7ER
No-voltage Input Model
Transistor Input (Open Collector of an NPN Transistor)
Open collector of
an NPN transistor
Input