Instruction Manual

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

64 Watlow Anafaze Doc.# 30002-00 Rev 2.3

Connecting Digital Inputs

The PPC-2040 module can accept digital inputs. When the

resistance of an input device is 27 kOhm or greater, the input

is considered off by the PPC-2000. When the resistance is 1

kOhm or less, the input is considered on.

To install a switch as a digital input, connect one lead to the DC

Common input return on the TB50. Connect the other lead to

the desired digital input on the TB50. Refer to Table 2.21 on

page 63 for screw terminal numbering.

Use the Digital I/O parameters to configure digital inputs.

Refer to Digital I/O on page 132.

Figure 2.48 Wiring Digital Inputs

Connecting Counter or Frequency Inputs

A PPC-2040 module accepts single-phase or quadrature pulse

signals from devices such as encoders. Counts and frequencies

of the inputs may be scaled with user selectable parameters.

See Setting up User Selectable Linear Inputs on page 98 for

more information.

The PPC-2040 module can accommodate encoder signals up to

24Vdc. The following figures illustrate connecting encoders:

Figure 2.49 Single Phase Connections: Input 1

and 2 Shown

Digital

Input

Device

TB50

Digital In

Com

1 (input 1 phase 1+)

3 (input 2 phase 1+)

37 (COM)

TB50