The Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX is a high-performance Distributed Control System (DCS) module designed for precise process control applications in industrial environments.

The WTS-B 4P is an automatic transfer switch from the Schneider Electric WTS (Transfer Switch) range . It is designed to ensure continuity of electrical supply by automatically transferring the load between a primary (normal) power source and a backup (emergency) power source, such as a generator

Key Features:

ATEX & IECEx Zone 1 Certified (Ex d IIC T4)

10mm explosion-proof probe with M16×1.5 threading

1.2-5.0mm extended range (4mV/µm sensitivity)

Triple-redundant sealing for gas ingress protection

IP69K-rated for washdown environments

Technical Specifications:

Frequency response: 0-6kHz (±3dB)

Power supply: -24VDC ±1% (intrinsically safe)

Output signal: -5 to -22VDC

Operating temperature: -60°C to +150°C

300 bar (4351 psi) pressure rating

Safety & Compliance:

Complies with API 670 (4th Ed.) and ISO 7919

ATEX II 2G Ex d IIC T4 Gb certified

IECEx IEC 60079-0/1 compliant

SIL 2 capable (SIL 3 option available)

Typical Applications:

Oil & gas refinery compressors

Petrochemical processing equipment

Grain handling facilities

Mining conveyor systems

Pharmaceutical solvent areas

Installation Notes:

Requires AISI 4140 steel targets (≥40 HRC)

EPRO ExSeal™ connector mandatory

Intrinsic safety barrier recommended

NIST-traceable calibration included