Allen-Bradley 1794-IE4XOE2 Analog Combo Module Overview

The Allen-Bradley 1794-IE4XOE2 is a Flex IO combination analog I/O module. Specifically, it belongs to the 1794 series from Rockwell Automation. Therefore, this module provides both analog inputs and outputs in one unit. Consequently, users select the 1794-IE4XOE2 for space-constrained applications. Moreover, the module features 4 input channels and 2 output channels. Finally, it mounts on a DIN rail and requires a compatible terminal base.

Input Specifications of 1794-IE4XOE2

The Allen-Bradley 1794-IE4XOE2 has 4 single-ended non-isolated inputs. Specifically, current input signals accept 0-20 mA or 4-20 mA. Voltage input signals accept ±10V DC or 0-10V DC ranges. Resolution is 12 bits for unipolar signals. For bipolar signals, resolution is 11 bits plus sign. Data format is left-justified 16-bit 2's complement.

Conversion type uses successive approximation method. Conversion rate is 256 microseconds per channel. Step response to 63% is 9.4 ms for voltage inputs. For current inputs, step response is 18.2 ms. Absolute accuracy is 0.20% of full scale at 25°C. Input impedance for voltage terminals is 100 kiloohms. For current terminals, input impedance is 238 ohms.

Normal mode rejection ratio for voltage is -3 dB at 17 Hz. At 50 Hz, the rejection is -10 dB for voltage inputs. For current inputs, rejection is -3 dB at 9 Hz. At 50 Hz, current input rejection is -15.3 dB. Therefore, the module filters AC noise effectively.

Output Specifications of 1794-IE4XOE2

The Allen-Bradley 1794-IE4XOE2 has 2 single-ended non-isolated outputs. Output current signals accept 0-20 mA or 4-20 mA ranges. Output voltage signals accept ±10V DC or 0-10V DC ranges. Conversion type uses Pulse Width Modulation (PWM) method. Accuracy is 0.133% of full scale at 25°C. Maximum current load on voltage output is 3 mA.

Terminal Base Compatibility

The Allen-Bradley 1794-IE4XOE2 requires a terminal base unit for wiring. Compatible bases include 1794-TB2, 1794-TB3, and 1794-TB3S. Also compatible with 1794-TB3T and 1794-TB3TS. Therefore, choose the base that suits your wiring needs. Wire size is determined by the installed terminal base. The terminal base provides connection points and backplane interface pins.

Power and Environmental Specifications

The Allen-Bradley 1794-IE4XOE2 requires external 24V DC power. Power supply range is 19.2 to 31.2 Volts DC. Current draw is 70 mA at 24 Volts DC. FlexBus current is 20 mA from the backplane. Maximum power dissipation is 4 Watts at 31.2V DC. Thermal dissipation reaches 10.2 BTU per hour at 31.2V DC maximum. At maximum load, thermal dissipation is 13.6 BTU per hour.

Operating temperature ranges from 0°C to 55°C (32°F to 131°F). Storage temperature ranges from -40°C to 85°C (-40°F to 185°F). Vibration withstands 5g at 10 to 500 Hz. Operating shock tolerance is 30g for reliable performance. The module dimensions are approximately 1.8 x 3.7 x 2.1 inches. Weight is not specified but typical for Flex I/O modules.

Installation Guidelines for Allen-Bradley 1794-IE4XOE2

First, mount the 1794-IE4XOE2 on a standard DIN rail. Then, snap the module onto the rail until it locks. After that, attach the module to a compatible terminal base. Next, connect the terminal base to the Flex IO adapter. Subsequently, connect analog field wiring to the terminal base. Finally, apply 24V DC power to the module.

First, shut off all power before wiring the module. Then, use shielded cable for all analog signal wiring. Connect the shield drain wire to ground at one end only. For current inputs, connect the signal positive and negative correctly. For voltage inputs, use twisted pair wires for noise reduction. Do not exceed the specified input voltage or current ranges. Finally, configure the input and output ranges in your control software.

Package Contents of 1794-IE4XOE2

Your shipment includes these items:

One Allen-Bradley 1794-IE4XOE2 analog combo module

One product installation instructions manual

Six channel identification labels

However, the package does not include the terminal base unit. Therefore, order a compatible base like 1794-TB3 separately. Also, no mounting hardware is provided with this module. Finally, communication adapters are not included in the shipment.

Frequently Asked Questions about 1794-IE4XOE2

1. What input signal types does the 1794-IE4XOE2 accept?

The Allen-Bradley 1794-IE4XOE2 accepts 0-20 mA and 4-20 mA current signals. Specifically, it also accepts ±10V DC and 0-10V DC voltage signals. Therefore, this module suits many analog sensor types. Configure each channel independently for your signal type.

2. What output signal types does the 1794-IE4XOE2 provide?

The 1794-IE4XOE2 provides 0-20 mA and 4-20 mA current outputs. Specifically, it also provides ±10V DC and 0-10V DC voltage outputs. Therefore, this module drives most analog actuators and valves. Configure each output channel for your application needs.

3. Are the inputs and outputs on the 1794-IE4XOE2 isolated?

No, the Allen-Bradley 1794-IE4XOE2 has non-isolated single-ended channels. Specifically, all inputs and outputs share a common reference. Therefore, use external isolators if needed for your application. Group signals with the same reference for best results.

4. What terminal bases work with the 1794-IE4XOE2?

The 1794-IE4XOE2 works with five terminal base models. Specifically, compatible bases are 1794-TB2, 1794-TB3, and 1794-TB3S. Also compatible with 1794-TB3T and 1794-TB3TS. Therefore, choose the base that suits your wiring density. Wire size depends on the selected terminal base.

5. What is the resolution of the 1794-IE4XOE2?

The Allen-Bradley 1794-IE4XOE2 has 12 bit resolution for unipolar signals. Specifically, bipolar signals use 11 bits plus sign. Therefore, the module provides good precision for most industrial applications. Data is stored in left-justified 16-bit 2's complement format.

Compatibility and Application Notes

The Allen-Bradley 1794-IE4XOE2 works with any Flex IO communication adapter. Specifically, it mounts on a DIN rail with a terminal base. Use this module for mixed analog I/O requirements in distributed systems. The combination design saves space in control cabinets. UPC number is 10612598137807. The module uses successive approximation for inputs and PWM for outputs. HS code for customs is 85389000. Finally, store the module in a static-free environment before installation. Allen-Bradley and Rockwell Automation manufacture this product in the USA.