Overview
Allen-Bradley 1746-NO4V is a four-point, non-isolated SLC 500 standard analog voltage output module. This module is used with SLC 500 fixed or modular style hardware, making it a direct replacement for legacy analog output applications requiring precise voltage control in industrial automation systems.
Key Features
- Four output channels that provide output voltage range of -10 to +10 VDC
- Four precise analog outputs that update at speeds of 512 microseconds
- 14-bit converter resolution using R-2R ladder for conversion
- Module does not support removal under power; never remove this module when power is applied as electrical arcs may cause damage to electronic circuitry
- External and backplane power offered at 5V DC or 24V DC
- Single-slot chassis mounting compatible with SLC 500 systems
Technical Specifications
The 1746-NO4V delivers stable analog voltage outputs with industry-standard resolution and update rates suitable for process control, valve positioning, and drive signal applications.
- Backplane current rating of 55 mA at 5V DC and 145 mA at 24V DC
- Output coding rating of +/-10V DC-1LSB with output resolution of -32768 to +32765 at ±10V DC
- Per LSB output resolution of 1.221 mV
- 14-bit digital-to-analog converter
- Non-isolated analog output channels
- Single chassis slot mounting
Typical Applications
The 1746-NO4V is widely used in SLC 500 automation systems for:
- Analog voltage signal outputs to proportional valves and solenoids
- Drive command signals for variable frequency drives (VFDs)
- Sensor signal conditioning and transducer outputs
- Process control loops requiring 4-20 mA or 0-10V signal adaptation
- Legacy system maintenance and expansion in industrial facilities
Compatibility & Replacements
Compatible With
- SLC 500 fixed-slot processors (1747-L531, 1747-L541, 1747-L543, and others)
- SLC 500 modular processors with 1746 chassis
- SLC 500 power supplies (1746-P1, 1746-P2, external 24V supplies)
- SLC 500 I/O chassis (1746-A4, 1746-A5, 1746-A7, 1746-A8, 1746-A10, 1746-A13)
- RSLogix 500 programming environment
Replaces / Drop-In Replacement For
- Existing 1746-NO4V modules in operational SLC 500 systems
- Failed or aging analog output cards in legacy SLC 500 installations
- Systems requiring exact form-factor compatibility with original 1746 I/O slot architecture
Works With
- RSLogix 500 programming software
- SLC 500 instruction set and ladder logic environment
- 1746-UM005 (SLC 500 4-Channel Analog I/O Modules User Manual)
- Standard SLC 500 backplane communication (local I/O addressing)
- External analog signal conditioning circuits and transducers
