Overview
The TECO SG2-10HR-A is a compact programmable logic relay (PLR) that bridges the gap between traditional smart relays and full-featured PLCs. The SG2 series from TECO delivers the affordability of a programmable relay with the control capabilities of a small PLC, making it an efficient choice for small-to-medium automation applications.
Key Features
- 6 AC inputs and 4 relay outputs with expandable I/O capacity up to 34 total points
- 4×16 character LCD backlit display with 8 programming keys for local control and feedback
- AC 100–240V operation (85–264V range) supports global deployment
- Relay output contacts rated for 8A resistive load at 265VAC or 30VDC
- Built-in real-time clock (RTC) with up to 240 hours battery-backed retention
- 2K program step capacity for ladder logic and function block programming
- Free SG2 Client software runs on Windows; ladder logic and function block programming support
- Retentive flash memory preserves program logic during power loss
- Multi-language support and password protection (16-bit levels A & B)
- UL/cUL/CE certifications
Technical Specifications
The SG2-10HR-A is designed for straightforward, compact discrete control. Input current at 110VAC is 0.66 mA; at 220VAC, 1.3 mA. The device weighs 0.6 lbs and is manufactured in Taiwan. Built-in Modbus RTU support enables remote I/O and network integration; high-speed pulse outputs (1 kHz PLSY) and 2 PWM channels provide flexible signal conditioning.
Typical Applications
- Discrete Process Control: Pump/motor sequencing, light stacks, conveyor logic, alarm management.
- Machine Automation: Small assembly, packaging, and labeling equipment control.
- Energy Management: HVAC interlocks, fan/compressor motor control, thermal monitoring via RTC scheduling.
- Facility Systems: Lighting control, gate/door automation, batch sequencing.
- Retrofit & Upgrades: Drop-in replacement for legacy smart relays in industrial controls.
Compatibility & Replacements
Compatible With
- SG2 Client programming software (Windows-based, free download)
- Ladder Logic and Function Block programming languages
- Modbus RTU (RS-485) serial communication protocol
- 8-channel I/O link expansion modules
- Remote I/O devices via built-in expansion ports
- Standard 24VDC auxiliary power supplies for expansion I/O
Replaces / Drop-In Replacement For
- TECO SG2-10KR-A (keypad variant with KR designation)
- TECO SG2-10CR-A (compact version)
- Legacy TECO smart relay models in SG2 series (verify part number before ordering)
Works With
- SG2 Client: Native Windows programming IDE for ladder logic and function block development
- Modbus RTU: Serial communication for remote I/O and SCADA integration
- Memory Cartridge: Optional external program backup storage (part TEC-200 programming cable required)
- Expansion I/O: Up to 34 total I/O via plug-in expansion modules
