Technical Specifications for AB Analog IO Module 1746-NI8

Brand Allen-Bradley

Part Number/Catalog No. 1746-NI8

Series SLC 500

Module Type Analog I/O Module

Backplane Current (5 Volts) 200 milliamps

Inputs 1746-NI4

Backplane Current (24 Volts DC) 100 milliamps

Input signal Category -20 to +20 mA (or) -10 to +10V dc

Bandwidth 1-75 Hertz

Input Filter Frequencies 1 Hz, 2 Hz, 5 Hz, 10 Hz, 20 Hz, 50 Hz, 75 Hz

Update Time 6 milliseconds

Chassis location Any I/O module slot except slot 0

Resolution 16 bits

Backplane Current (5 Volts) 200 mA;(24 Volts DC) 100 mA

Step Response 0.75-730 milliseconds

Conversion type Successive approximation, switched capacitor

Applications Combination 120 Volts AC I/O

Input Types, Voltage 10V dc 1-5V dc 0-5V dc 0-10V dc

Backplane Power Consumption 14 Watts Maximum

Input Type, Current 0-20 mA 4-20 mA 20 mA 0-1 mA

Input Impedance 250 Ohms

Data Format Engineering Units Scaled for PID Proportional Counts (-32,768 to +32,767 range), Proportional Counts (User Defined Range, Class 3 only). 1746-NI4 Data Form

Cable 1492-ACABLE*C

LED Indicators 9 green status indicators one for each of 8 channels and one for module status

Thermal Dissipation 3.4 Watts

Wire Size 14 AWG

UPC 10662072678036

UNSPSC 32151705

About 1746-NI8

The Allen-Bradley 1746-NI8 is an analog single-slot I/O module for the SLC 500 system. It is a high-resolution analog input module that is configurable with RSLogix 500 programming software. It is suitable for time-sensitive applications that require fast analog signal conversion and high accuracy. The 1746-NI8 module has an 8-Channel input with an isolated backplane. Its backplane current consumption is 200mA and 100mA at 5 Volts DC and 24 Volts DC respectively. It has a maximum backplane power consumption of 1 Watt at 5 Volts DC and 2.4 Watts at 24 Volts DC. The 1746-NI8 can be installed in any I/O slot, except Slot 0 of the SLC 500 I/O chassis. Input signal data is converted to digital data via successive approximation conversion. The 1746-NI8 module uses programmable filter frequencies with a low-pass digital filter for input filtering. It performs continuous autocalibration and has an isolation voltage of 750 Volts DC and 530 Volts AC, tested for 60 seconds. It has a common-mode voltage ranging from -10 to 10 Volts with a maximum of 15 Volts between any two terminals.

The 1746-NI8 module comes with a removable terminal block of 18 positions. For wiring, the Belden 8761 or a similar cable must be used with one or two 14 AWG wires per terminal. The cable has a maximum loop impedance of 40 Ohms at the voltage source and 250 Ohms at the current source. For troubleshooting and diagnostics, it has 9 green LED status indicators. The 8 channels have one indicator each to display the input status and one each for displaying the module status. The 1746-NI8 has a Division 2 hazardous environment standard with an operating temperature of 0 to 60 degrees Celsius.

The 1746-NI8 features Eight (8) channel analog input module compatible for used with SLC 500 Fixed or modular hardware style controllers. This module from Allen-Bradley has individually selectable voltage or current input channels. Available selectable input signals include 10V dc, 1–5V dc, 0–5V dc, 0–10V dc for Voltage while 0–20 mA, 4–20 mA, +/-20 mA for Current.

Input signals may be represented as Engineering Units, Scaled-for-PID, Proportional Counts (–32,768 to +32,767 range), Proportional Counts with User Defined Range (Class 3 only) and 1746-NI4 Data.

This Eight (8) channel module is compatible for use with SLC 5/01, SLC 5/02, SLC 5/03, SLC 5/04 and SLC 5/05 processors. SLC 5/01 may only operate as class 1 while SLC 5/02, 5/03, 5/04 are configurable for Class 1 and Class 3 operation. The channels of each module may be wired in single-ended or differential input.