Yokogawa 415 Steam and Gas - Manual (Page 40)

Connection of Output Pulse is as follows:
Driving an External Relay or Impulse Counter
Driving a Logic Input such as a PLC or Electronic Counter
38 Operation
11 DC Supply
Out (8-24V)
Model 415
5.6 ohms
33V
Zener
2
External Load
Resistor 10K
Logic Input
10
Model 415
5.6 ohms
33V
Zener
12
DC Supply
Relay or
Impulse Counter
10