Analog Module Selection Guide; Digital Output Module Selection Guide - Allen-Bradley 1719 Ex I/O User Manual

Chapter 2 Product Specifications
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Analog Module Selection Guide

• 1719-CF4H
The 1719-CF4H is a configurable input/output module. The module can
be configured as either analog input or analog output. As an analog input
device, it feeds 2-wire transmitters. As an analog output device, it can drive
proportional valves, I/P converters, or local indicators. Note that the
module is not configurable by channel. The 1719-CF4H offers 12-bit
resolution.
• 1719-IF4HB
The 1719-IF4HB is an analog input module that feeds 2- and 3-wire
transmitters. Active signals from separately powered field devices and 4-
wire transmitters can also be connected. The 1719-IF4HB offers 12-bit
resolution.
• 1719-IR4B
The 1719-IR4B is an RTD converter that accepts 2-, 3-, 4-wire RTD
signals and slide-wire sensors from the field. The 1719-IR4HB offers 12-
bit resolution.
• 1719-IT4B
The 1719-IT4B is a thermocouple converter that accepts thermocouple or
mV signals from the hazardous area and offers 12-bit resolution. The 1719-
IT4B I/O module is equipped with an internal cold junction. However, it
can be used with an external cold junction. Using the Add-on Profile, you
can set the cold junction compensation mode to either Local (internal) or
Remote (external).
For more information, see the Add-on Profile help topic for the 1719-
IT4B module.
A note on Analog Module Resolution:
When configuring the module with the Add-on Profile, the user can select the
sensor type and expected measuring range. Selecting the appropriate measuring
range configures the module to deliver the best resolution for the range selected.
For more information, see the Add-on Profile help topic for the 1719 analog
modules.

Digital Output Module Selection Guide

There are two digital output modules available to support different power
requirements of connected devices:1719-OB2 and 1719-OB2L.
The digital output modules can be configured to use the two channels separately
and independently or to combine the two outputs to one logical output with
more power. When the module is operating in the latter configuration, referred
to as "2 in 1 Mode, " the LED labeled "M" on the front of the 1719-OB2 or
1719-OB2L will be illuminated. In the Add-on Profile, the two modes are
referred to as "Low Current, Two Points, " and, "High Current, One Point."
Rockwell Automation Publication 1719-UM001C-EN-E - August 2018