The 1794-OE4 module delivers reliable analog output for industrial systems. This Flex I/O module provides four single-ended channels with configurable signal ranges for process control. Engineers use it with variable frequency drives and modulating valves.
Product Procurement & Buyer Guide
The 1794-OE4 module solves critical application needs with precision analog outputs. You get four channels supporting 0-20mA, 4-20mA, ±10VDC, and 0-10VDC signals. This flexibility allows one module to control diverse final control elements.
The module uses pulse width modulation for its output conversion method. It processes all channels at a rapid 1.024 milliseconds maximum conversion rate. This speed ensures responsive control for modulating valves and VFDs.
Accuracy remains tight with a voltage input accuracy of 0.133% full scale at 25°C. The current input accuracy reaches 0.425% full scale at the same temperature. Drift remains minimal at 0.0045% per degree Celsius for voltage signals.
The 1794-OE4 operates within a 0 to 55°C temperature range. It handles vibration up to 5g at 10 to 500 Hz. These specs make it suitable for rugged factory floor environments.
Power dissipation reaches a maximum of 4.5W at 31.2 Volts DC. Thermal dissipation hits 15.3 BTU per hour under the same conditions. The Flexbus current rating sits at 20 mA for reliable communication.
Expert Technical Evaluation
This module delivers 12-bit plus sign resolution for smooth analog signals. Voltage resolution is 2.56mV per count and current resolution is 5.13µA per count. The data format uses left-justified 16-bit 2s complement.
The output step response time is 24 milliseconds reaching 63% of full scale. This rapid response suits applications needing quick adjustments. The voltage output supports a maximum current load of 3 mA.
Current output channels handle resistive loads from 15 to 750 Ω. The module provides continuous isolation of 50 Volts between I/O and system. No individual channel isolation exists, so plan your wiring accordingly.
The 1794-OE4 works with terminal bases like 1794-TB2 and 1794-TBN. It mounts easily on a DIN rail for streamlined installation. The required keyswitch position is 4 for proper configuration.
A single green or red power status indicator monitors module operation. The module does not require calibration, reducing maintenance overhead. It needs an external DC supply from 10.0 to 31.2 Volts DC.
