Product Overview
The Allen-Bradley 1746SC-NO8I is an isolated analog output module designed for use with SLC 500 control systems.
It provides multiple current output channels for interfacing SLC controllers with analog field devices such as control valves, actuators, and instrumentation requiring stable current signals.
This module is commonly used in process control and legacy automation systems where signal isolation is required to reduce electrical noise, prevent ground loops, and protect the controller from field-side disturbances. The 1746SC-NO8I is typically supplied as a replacement or spare part for existing SLC installations.
Contact Information
| Contact Type | Details |
|---|---|
| sales3@mooreplc.com | |
| WhatsApp / Phone | +86 180 2071 4662 |
Technical Specifications
| Parameter | Value |
|---|---|
| Number of Output Channels | 8 isolated outputs |
| Output Signal Range | 0–20 mA / 4–20 mA |
| Channel Isolation | Channel-to-channel and channel-to-backplane isolation |
| Resolution | 12-bit |
| Update Method | Via SLC 500 controller |
| Compatible Controllers | SLC 500 processors |
| Power Supply | Provided by SLC 500 chassis |
| Mounting Type | 1746 SLC I/O slot |
| Operating Environment | Industrial control cabinet |
| Lifecycle Status | Discontinued – Installed base support |
Why the 1746SC-NO8I Is Used
Unlike standard analog output modules, the 1746SC-NO8I incorporates signal isolation, making it suitable for applications where electrical noise or differing ground potentials are present.
This design helps protect both the controller and connected field devices while maintaining stable current output performance in demanding industrial environments.
Frequently Asked Questions
Q: What type of signals does the 1746SC-NO8I output?
A: It provides isolated current outputs, typically configured for 0–20 mA or 4–20 mA.
Q: Is this module compatible with all SLC 500 controllers?
A: It is designed for use within SLC 500 systems and should be verified against the specific processor and chassis.
Q: Why is isolation important for analog outputs?
A: Isolation helps prevent electrical noise and ground loops from affecting signal accuracy and controller stability.
Q: Is the 1746SC-NO8I still in production?
A: It is mainly supplied for installed base and legacy SLC 500 system support.
About PLC EXPORT
PLC EXPORT supplies industrial automation spare parts and legacy control system components worldwide.
We specialize in SLC 500 modules, ControlLogix hardware, drive system boards, I/O modules, and discontinued automation products, helping customers maintain system continuity and reduce downtime.
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