Description
| Product model | SW1-31 GE |
| Manufacturer | GE Intelligent Platforms (now part of Emerson Automation Solutions) |
| Product category | Industrial PLC I/O Terminal Block / Wiring Assembly |
| Core function | 31-pin terminal block for connecting field wiring to GE PLC systems |
| Compatible systems | GE Fanuc RX3i, Series 90-30, PACSystems RX3i, VersaMax (via adapter) |
| Mounting type | Snap-on to PLC base or I/O module backplane |
| Connector type | 31-pin Eurostyle screw terminal block |
| Pin pitch | 5.08 mm (0.200 inches) |
| Current rating | 5 A per terminal (maximum) |
| Voltage rating | 250 V AC / 300 V DC (maximum) |
| Wire size range | 22–12 AWG (0.5–2.5 mm²) |
| Terminal type | Cage clamp or screw clamp (depending on revision) |
| Insulation material | Flame-retardant thermoplastic (UL 94 V-0) |
| Operating temperature | -25°C to +85°C (-13°F to 185°F) |
| Certifications | CE, UL, CSA, RoHS compliant |
Product introduction
The SW1-31 GE is a 31-pin terminal block assembly designed by GE Intelligent Platforms for use in GE Fanuc PLC systems, particularly the RX3i, Series 90-30, and PACSystems families. It serves as the critical interface between the programmable logic controller (PLC) and external field devices such as sensors, actuators, relays, motors, and HMI panels. This terminal block is typically used with CPU bases, power supplies, or I/O modules that require external wiring connections.
The SW1-31 GE features a robust 31-pin Eurostyle connector with a 5.08 mm pitch, allowing for secure and reliable termination of field wiring. It snaps directly onto the PLC base unit or expansion module, ensuring a stable mechanical and electrical connection. The terminals are rated for 5A and 250V AC, making them suitable for both digital and analog signal routing in industrial environments.
Widely used in manufacturing, energy, water treatment, and transportation sectors, the SW1-31 GE plays a vital role in system reliability by providing a clean, organized, and serviceable point for field wiring. Its flame-retardant housing and wide operating temperature range make it ideal for harsh industrial conditions.
SW1-31 GE
Core advantages and technical highlights
Direct compatibility with GE PLC systems:
The SW1-31 GE is engineered specifically for GE Fanuc RX3i and Series 90-30 PLCs, ensuring perfect fit and electrical compatibility. It integrates seamlessly with CPU310, CPU315, and other RX3i processors, as well as expansion bases.
High-density 31-pin configuration:
With 31 circuits in a compact form factor, this terminal block maximizes I/O density while minimizing panel space. The standardized 5.08 mm pitch aligns with common industrial connectors and simplifies wiring.
Durable and reliable construction:
Constructed from UL 94 V-0 flame-retardant material, the SW1-31 GE resists heat, chemicals, and mechanical stress. The screw or cage clamp terminals ensure secure wire retention, preventing loosening due to vibration.
Easy installation and maintenance:
The snap-on design allows for quick installation and removal without tools. Field technicians can easily access terminals for troubleshooting, re-wiring, or system upgrades, reducing downtime during maintenance.
Industrial-grade performance:
Rated for operation from -25°C to +85°C, the SW1-31 GE performs reliably in extreme environments, including high-heat control cabinets and cold outdoor enclosures. Its robust design ensures long service life in continuous operation.
Typical application scenarios
In a wastewater treatment plant, the SW1-31 GE is used on an RX3i PLC to connect level sensors, pump starters, and valve actuators. The terminal block provides a centralized, labeled point for all field wiring, simplifying commissioning and enabling quick isolation of faults.
In an automotive assembly line, multiple SW1-31 GE blocks are installed on Series 90-30 PLC bases to interface with photoelectric sensors, solenoid valves, and conveyor motor controls. The high current rating supports direct switching of small loads without additional relays.
In a power generation facility, the SW1-31 GE connects protective relays, temperature transmitters, and alarm systems to a GE PACSystem controller. Its flame-retardant housing and electrical isolation enhance safety in high-voltage environments.
For system integrators upgrading legacy GE systems, the SW1-31 GE is a critical spare part, ensuring continuity of operations when replacing damaged or obsolete terminal blocks.
Related model recommendations
SW1-20 GE – 20-pin terminal block for smaller I/O modules or power supplies.
SW1-40 GE – 40-pin terminal block for high-density I/O or CPU modules.
IC695ACC311 – RX3i CPU base with integrated SW1-31 terminal block.
IC695CPU310 – GE RX3i CPU module that uses SW1-31 for field wiring.
IC693ACC311 – Series 90-30 CPU base with SW1-31 compatibility.
GE IC695ALG390 – Analog input module that may use similar terminal assemblies.
Phoenix Contact 3046631 – Alternative 31-pin terminal block (generic Eurostyle).
Turck IFC211-GE – Field connector module for industrial networks.
SW1-31 GE
Installation, commissioning and maintenance instructions
Installation preparation:
Power down the PLC system and disconnect all field wiring before installation. Align the SW1-31 GE with the backplane connector on the CPU base or I/O module and press firmly until it clicks into place. Verify that the locking tab is engaged. Strip field wires to the correct length (6–8 mm) and insert them into the appropriate terminals. Tighten screws to the recommended torque (typically 0.5–0.6 Nm) to ensure good contact without damaging the wire. Label each terminal for easy identification.
Maintenance suggestions:
Periodically inspect terminals for signs of overheating, corrosion, or loose wires. Retighten screws during scheduled maintenance. Clean the housing with a dry cloth; avoid solvents that may degrade the plastic. If a terminal block is damaged, replace it immediately to prevent signal loss or short circuits. Store spare SW1-31 GE blocks in anti-static packaging in a dry, temperature-controlled environment.
