Overview
The Square D 8005-RT-108 /A1 is a relay output module designed for integration with Square D Sy/Max Class 8005 programmable logic controllers. This eight-output relay module provides direct relay switching capability for legacy automation systems requiring proven, industrial-grade I/O. The unit operates across 120-240VAC at 50/60Hz with an internal draw of 150mA, making it suitable for retrofit applications and equipment requiring relay-based control logic.
Key Features
- Eight relay outputs: Industry-standard miniature relay configuration for flexible load switching
- Dual voltage support: 120-240VAC 50/60Hz operation accommodates global power standards
- High reliability: Each relay rated at 4.5A @ 120VAC and 2A @ 240VAC for resistive loads
- LED status indicators: Red LED bank on module top displays real-time relay activity for diagnostics
- Compact form factor: Lightweight rectangular enclosure (0.66 lbs) with terminal strip connections (leads labeled 0–7)
- Upgrade flexibility: Relays can be replaced with SSR outputs (STM-10) or transistor outputs (TTM-10) for application-specific needs
Technical Specifications
- Part Number: 8005-RT-108 /A1
- Series/Revision: Sy/Max Class 8005, Series A1
- Output Type: Relay (8 miniature relays)
- Output Rating (Resistive): 4.5A @ 120VAC, 2A @ 240VAC
- Input Voltage: 120-240VAC
- Frequency: 50/60Hz
- Current Draw: 150mA
- Weight: 0.66 lbs (approximately 620g)
- Mounting: DIN rail or chassis mounting via terminal strip
- Terminal Configuration: 8-point terminal strip (outputs labeled 0–7)
- Status Indication: LED indicator bank
- Condition: Used, fully functional
Typical Applications
The 8005-RT-108 /A1 is ideal for:
- Legacy system upgrades and maintenance for existing Sy/Max Class 8005 installations
- Replacing failed or worn relay output modules without controller retrofit
- Machine tool and industrial equipment control requiring relay switching
- HVAC and building automation systems using Sy/Max control platforms
- Temporary or mobile automation installations where proven technology is preferred
Compatibility & Replacements
Compatible With
- Square D Sy/Max Class 8005 Model 50 programmable logic controllers
- Square D Sy/Max Class 8005 system backplanes and chassis
- 24VDC or 120/240VAC power supplies rated for 150mA draw
- Devices rated for 4.5A @ 120VAC or 2A @ 240VAC resistive loads
Replaces / Drop-In Replacement For
- Square D 8005-RT-108 (standard revision, without /A1 designation)
- Schneider Electric 8005-RT-108 (OEM equivalent after Schneider acquisition)
- Legacy relay output modules in Sy/Max Class 8005 systems
Works With
- Square D programming software and environments supporting Class 8005 platforms
- STM-10 solid-state relay upgrade modules (direct replacement option)
- TTM-10 transistor output modules (alternative upgrade path)
- Standard industrial relay contactors and solenoid loads up to rated capacity
