Allen-Bradley 1734-OB8S

78 Rockwell Automation Publication 1734-UM013N-EN-P - September 2017
Chapter 4 Install the Module
Figure 47 - Safety Analog Input Wiring for Sinking Tachometer Sensor
Figure 48 - Safety Analog Input Wiring for Sourcing Tachometer Sensor
Follow the Guidelines for Wiring Safety Analog Inputs on page 71.
V0 V1 V2 V3
I0 I1 I2 I3
COM COM COM COM
COM COM COM COM
S0 S1 S2 S3
S0 S1 S2 S3
Sinking Sensor
(NPN-type)
1734-TOP3 Terminal Bases
Metal Oxide or
Carbon
Composition
1k
2W
25
20
15
10
5
0
Edge-to-edge Time
Measured Here
1734-IE4S with Trigger = Falling Edge
Transistor Pull-down
Resistor Pull-up
Electronics
V0 V1 V2 V3
I0 I1 I2 I3
COM COM COM COM
COM COM COM COM
S0 S1 S2 S3
S0 S1 S2 S3
1734-TOP3 Terminal Bases
Sourcing Sensor
(PNP-type)
Metal Oxide or
Carbon
Composition
1k
2W
25
20
15
10
5
0
Edge-to-edge Time
Measured Here
1734-IE4S with Trigger = Rising Edge
Resistor Pull-
down
Transistor
Pull-up
Electronics