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Pepperl+Fuchs WE77/EX‑2 | Intrinsic-Safety Switch Amplifier | 2‑Channel Relay Output
Overview
The WE77/EX-2 is a dual-channel intrinsic-safety-certified switch amplifier (EEx ia IIC) from Pepperl+Fuchs. Designed for hazardous-area applications, it interfaces NAMUR sensors and mechanical contacts, converting signals into isolated relay outputs—ideal for Zone 0/1 control systems
Key Features
-
Input: NAMUR digital or mechanical signals
-
Channels: 2 independently isolated channels
-
Power Supply: 115 V AC or 230 V AC variants
-
Outputs: SPDT relay contacts (250 V AC / 2 A) per channel
-
Lead‑Break Monitoring: Detects sensor cable faults
-
DIN‑Rail Housing: Compact W2 form, IP20 rated
-
Status LEDs: Visual power and channel activity
Specifications
Parameter | Value |
---|---|
Input Supply | 103–126 V AC or 198–253 V AC, 45–65 Hz |
Input Type | NAMUR sensors, per EN 60947-5-6 |
Output Load | 250 V AC @ 2 A / 500 VA, 40 V DC @ 2 A |
Delay (On/Off) | ~10 ms / ~20 ms |
Switch Rate | < 10 Hz |
Certifications | ATEX/IECEx, NAMUR EEx ia IIC, Zone 0/1/2 |
Isolation Voltage | ≥ 300 V (field-control, field-supply) |
Ambient Temp. | –25 °C to +60 °C |
Ingress Protection | IP20 |
Housing | DIN-rail W2: 60×110×100 mm |
Applications
-
Hazardous-area NAMUR sensor signal isolation
-
Interface for limit/nid-style sensors to PLCs
-
Functional safety systems in oil & gas, chemical, and petrochemical plants
-
Use in Zone 0/1 environments requiring ATEX/IECEx compliance
Why Choose WE77/EX‑2
-
Dual-channel isolation with separate relay outputs
-
Robust intrinsic safety design for volatile environments
-
Lead-break monitoring enhances safety diagnostics
-
Compact DIN-rail housing simplifies installation
-
Global certifications (ATEX, IECEx, cULus) ensure compliance
Order Now
The Pepperl+Fuchs WE77/EX‑2 switch amplifier is available in both 115 V and 230 V versions—worldwide shipping available.
Description
Pepperl+Fuchs WE77/EX‑2 | Intrinsic-Safety Switch Amplifier | 2‑Channel Relay Output
Overview
The WE77/EX-2 is a dual-channel intrinsic-safety-certified switch amplifier (EEx ia IIC) from Pepperl+Fuchs. Designed for hazardous-area applications, it interfaces NAMUR sensors and mechanical contacts, converting signals into isolated relay outputs—ideal for Zone 0/1 control systems
Key Features
-
Input: NAMUR digital or mechanical signals
-
Channels: 2 independently isolated channels
-
Power Supply: 115 V AC or 230 V AC variants
-
Outputs: SPDT relay contacts (250 V AC / 2 A) per channel
-
Lead‑Break Monitoring: Detects sensor cable faults
-
DIN‑Rail Housing: Compact W2 form, IP20 rated
-
Status LEDs: Visual power and channel activity
Specifications
Parameter | Value |
---|---|
Input Supply | 103–126 V AC or 198–253 V AC, 45–65 Hz |
Input Type | NAMUR sensors, per EN 60947-5-6 |
Output Load | 250 V AC @ 2 A / 500 VA, 40 V DC @ 2 A |
Delay (On/Off) | ~10 ms / ~20 ms |
Switch Rate | < 10 Hz |
Certifications | ATEX/IECEx, NAMUR EEx ia IIC, Zone 0/1/2 |
Isolation Voltage | ≥ 300 V (field-control, field-supply) |
Ambient Temp. | –25 °C to +60 °C |
Ingress Protection | IP20 |
Housing | DIN-rail W2: 60×110×100 mm |
Applications
-
Hazardous-area NAMUR sensor signal isolation
-
Interface for limit/nid-style sensors to PLCs
-
Functional safety systems in oil & gas, chemical, and petrochemical plants
-
Use in Zone 0/1 environments requiring ATEX/IECEx compliance
Why Choose WE77/EX‑2
-
Dual-channel isolation with separate relay outputs
-
Robust intrinsic safety design for volatile environments
-
Lead-break monitoring enhances safety diagnostics
-
Compact DIN-rail housing simplifies installation
-
Global certifications (ATEX, IECEx, cULus) ensure compliance
Order Now
The Pepperl+Fuchs WE77/EX‑2 switch amplifier is available in both 115 V and 230 V versions—worldwide shipping available.