Instruction Manual

Chapter 2: Hardware Installation PPC-2000 User’s Guide

52 Watlow Anafaze Doc.# 30002-00 Rev 2.3

CAUTION!

Do not connect the COM terminals on the AITB to

earth ground. Connecting COM to earth ground limits

the input protection to ±10Vac and could result in

damage to the input circuit.

Connecting Sensors with Linear Voltage Signals

For sensors with single output connections, connect the

negative input (B terminal) to the sensor common terminal.

Differential voltage transducers or sensors, such as bridges,

should be connected with the positive signal lead on the A

terminal and the negative signal lead to the B terminal for the

selected input. See Figure 2.35.

Check sensor power supply connections and ground

connections to avoid exceeding the common mode range of the

Analog Input module or creating ground loops.

Figure 2.35 Connecting Linear Voltage Signals to

Differential Inputs 1 and 2

Single-ended voltage sources should have the positive lead on

the positive terminal of the desired input. The negative lead

should be connected to the COM terminal. See Figure 2.36 on

page 53.

Transducer

1A (input 1+)

1B (input 1-)

with linear

voltage

output

Transducer

with linear

voltage

output

2A (input 2+)

2B (input 2-)

COM

AITB