Digital And Virtual Inputs - Allen-Bradley 857 Quick Start Manual

Digital and Virtual Inputs

There are up to 20 digital inputs available for control purposes (varies by
model). The polarity – normal open (NO) / normal closed (NC) – and an
operational delay can be configured according to the application. These input
signals are available for use within the output matrix, block matrix,
programmable logic, and so on. 120V or 220V AC is used to activate digital
input 7...20. Use the SetPointPS software to select the AC Coupling Mode.
The contacts that are connected to digital inputs DI1...DI6 must be dry. These
inputs use the common internal 48-Vdc wetting-voltage from terminal X3:1,
only.
Label and description texts can be edited with SetPointPS according to the
application. Labels are the short parameter names that are used on the local
panel and descriptions are the longer names that are used within SetPointPS
software.
Table 12 - Summary of Digital Inputs
An additional input card is available as an option. The additional option card is
located in the X8 location and has the same ratings as the card in X7.
DI Terminal Operating Voltage
- X3:1 48V DC supply for DI1...6
1 X3:2 Internal 48V DC
2 X3:3
3 X3:4
4 X3:5
5 X3:6
6 X3:7
7 X7:1 External 18...265V DC
50...250 V AC
8 X7:2
9 X7:3
10 X7:4
11 X7:5
12 X7:6
- X7:7 Common for DI7...12
13 X7:8 External 18...265V DC
50...250 V AC
14 X7:9
15 X7:10
16 X7:11
17 X7:12
18 X7:13
- X7:14 Common for DI13...17
19 X6:1...2 External 18...265V DC
50...250V AC
20 X6:3...4
Rockwell Automation Publication 857-QS001B-EN-P - April 2017
Local Panel User Interface Chapter 3
Availability
Always available
ARC card with 2 DIs
25