Description

The GE WES13-3(manufacturer part number 2508-21001)is a 3-channel solid-state relay(SSR)output module from GE Fanuc’s Series 90-30 I/O family,engineered for high-cycle,maintenance-sensitive industrial applications.Unlike traditional electromechanical relays,the WES13-3 uses optically isolated semiconductor switches to control AC or DC loads—delivering silent operation,millions of switching cycles,and immunity to contact arcing or bounce.

Application Scenarios

At a municipal water pumping station in Texas,frequent failures of electromechanical output modules caused unscheduled downtime during peak demand hours.The root cause?High-cycle solenoid valves for chemical dosing were wearing out mechanical relay contacts in under six months.Engineers replaced the legacy relay cards with the GE WES13-3,leveraging its solid-state design to handle over 100 valve actuations per hour without degradation.Each of the three channels on the WES13-3 now drives a 24 VDC solenoid with zero contact bounce,while built-in LED indicators confirm output status during routine checks.After 18 months of continuous operation,not a single SSR channel has failed—turning a chronic maintenance headache into a“fit-and-forget”solution.In this critical infrastructure setting,the WES13-3 proved that reliability isn’t just about uptime—it’s about predictability.

Parameter

Main Parameters Value/Description

Product Model WES13-3(Alternate:2508-21001)

Manufacturer GE Fanuc(now part of Emerson Automation Solutions)

Product Category 3-Channel Solid-State Relay(SSR)Output Module

Output Channels 3 independent SSR outputs

Load Voltage Range AC:24–250 VAC;DC:5–30 VDC

Maximum Load Current 2 A per channel(resistive load at 25°C)

Switching Type Zero-crossing(for AC);DC switching with fast turn-on

Electrical Isolation 3750 Vrms optical isolation between logic and field sides

Response Time<1/2 AC cycle(for AC);<100µs(for DC)

Diagnostic Indicators Per-channel green LED(ON=output energized)

Installation Method Plug-in module for Series 90-30 I/O racks or VersaMax base(with adapter)

Operating Temperature 0°C to+60°C

Technical Principles and Innovative Values

Innovation Point 1:True Solid-State Reliability with No Moving Parts

The WES13-3 replaces fragile mechanical contacts with TRIACs(for AC)and MOSFETs(for DC),enabling>100 million operations—ideal for high-frequency applications like PWM-controlled heaters or rapid solenoid sequencing.

Innovation Point 2:Built-In Zero-Crossing for EMI Reduction

On AC channels,the WES13-3 only triggers at voltage zero-crossings,minimizing inrush current and electromagnetic interference—critical in environments with sensitive instrumentation or radio communications.

Innovation Point 3:Seamless Drop-In Replacement for Electromechanical Modules

Designed as a direct upgrade for older GE relay modules(e.g.,RRM13),the WES13-3 uses the same backplane footprint and terminal wiring,allowing retrofit without panel rewiring or logic changes.

Innovation Point 4:Enhanced Diagnostics via Per-Channel LEDs

Unlike legacy relays that offer no visual feedback,each SSR on the WES13-3 features a front-panel LED—enabling instant verification of output state during troubleshooting or safety lockout procedures.

Application Cases and Industry Value

In a pharmaceutical cleanroom HVAC system,precise control of reheat coils and damper actuators was compromised by relay chatter from aging electromechanical outputs.The facility upgraded to the GE WES13-3 to drive 120 VAC reheat elements and 24 VDC damper motors.The zero-crossing switching eliminated harmonic distortion on shared power lines,while the silent operation met strict acoustic requirements.More importantly,during a regulatory audit,inspectors noted the absence of contact-welding risks—a known failure mode in safety-critical thermal loops.The plant reported zero HVAC-related deviations in the following year,attributing compliance success to the deterministic behavior of the WES13-3.

Related Product Combination Solutions

GE IC693MDL740:16-Point Relay Output Module–for applications requiring higher current(>2A)where SSRs are unsuitable.

GE IC693MDL654:32-Point TTL Output Module–pairs with WES13-3 for mixed low-voltage/high-voltage control.

GE IC693CPU374:Series 90-30 CPU–native support for WES13-3 in standard or redundant configurations.

GE IC660BBD104:16-Channel Digital Output Module(Genius I/O)–for distributed SSR-like control via remote I/O.

GE IC200MDL740:VersaMax Relay Output Module–alternative for compact standalone systems.

Emerson PACSystems RX3i:Modern PLC platform–can interface with WES13-3 via 90-30 expansion racks during brownfield upgrades.

GE WES13-1:Single-Channel SSR Module–for applications needing isolated,dedicated outputs.

GE IC693ACC303:Terminal Block Kit–ensures secure,labeled field wiring for WES13-3 installations.

Installation,Maintenance,and Full-Cycle Support

Installing the GE WES13-3 requires inserting it into a compatible Series 90-30 I/O slot or using a VersaMax-to-90-30 adapter base.Field wiring connects to removable screw-clamp terminal blocks,allowing pre-wired harnesses for rapid replacement.Because the module generates heat during operation,ensure adequate ventilation—especially when driving near-maximum loads continuously.Derating is recommended above 40°C ambient temperature.

Maintenance is virtually eliminated compared to mechanical relays,but periodic inspection of LED indicators and thermal imaging of terminals can catch rare issues like loose connections or overloaded circuits.In case of failure,the WES13-3’s modular design allows hot-swap(in non-redundant systems)with minimal downtime.We rigorously test every unit for switching integrity,isolation strength,and thermal performance—including accelerated life cycling under resistive and inductive loads.

As a trusted supplier of legacy GE automation components,we source WES13-3(2508-21001)units through authorized Emerson channels and verified decommissioned inventory.Each module undergoes full functional validation in a real 90-30 rack before shipment and includes a 12-month warranty.Our engineers provide cross-reference assistance,compatibility checks,and application guidance to ensure seamless integration—whether you’re maintaining a decades-old system or modernizing incrementally.

Contact us for a customized solution—because in industrial automation,the right output module doesn’t just switch a load;it safeguards your process,your people,and your productivity.