Rockwell Automation 1734-IE4S POINT Guard I/O Safety Modules User Manual User Manual

Page 71

Rockwell Automation Publication 1734-UM013J-EN-P - July 2014

Install the Module

Chapter 4

In the following two examples, the negative terminal of the sensor power supply
and that of the 1734 terminal base COMMON must be at the same potential.
Use of an external power supply limits diagnostics and increases susceptibility to
noise.

Follow the

Guidelines for Wiring Safety Analog Inputs on page 65

Figure 41 - 4-wire Voltage or Tachometer Sensor (SIL 2) with External Power Supply

Figure 42 - 4-wire Current Sensor (SIL 2) with External Power Supply

IMPORTANT

You are responsible for making sure that the sensor is receiving appropriate
power. Safety sensors that are not properly powered may not deliver accurate
signals to the analog input module.

COM

Signal Return and Common are at the same potential.

1734-TB Terminal Bases

Signal (V)

+24V

Cable Shield

Signal Return

4-wire
Sensor

See

Figure 43

and

Figure 44 on page 72

for tachometer wiring detail.

COM