SR-508-00 YOKOGAWA Safety Relay Module

SR-508-00 YOKOGAWA ProSafe Safety Relay Module

SR-508-00 YOKOGAWA ProSafe Safety Relay Module

Availability: 10 left in stock

YOKOGAWA SR-508-00 Safety Relay Module Configured for emergency shutdown and safety interlock execution in process automation control loops, the YOKOGAWA...

SKU: SR-508-00

Manufacturer: Yokogawa
Product No.: SR-508-00
Product Type: Safety Relay Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 50g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

YOKOGAWA SR-508-00 Safety Relay Module

Configured for emergency shutdown and safety interlock execution in process automation control loops, the YOKOGAWA SR-508-00 (SR-508 Safety Relay Module) provides direct physical/electrical execution. The hardware establishes galvano-optical and mechanical isolation between control logic actuation signals and field-side final control elements.

Suffix Breakdown & Model Matrix

Base Model	Suffix / Sub-part	Configuration Description
SR-508	-00	Standard hardware revision, DIN rail mountable safety relay module
SR-508	510508000	Associated manufacturing internal reference / catalog sequence number

Hardware Specifications

Parameter	Specification
Model	SR-508-00
Brand	Yokogawa
Origin	China
Weight	0.11 lbs (0.05 kg)
Dimensions	80 mm x 20 mm x 70.5 mm
Operating Temp	-20 to +70 deg C
Power Consumption	1.5 W
Input Voltage	24 VDC (-15% to +20%)
Input Current	35 to 40 mA
Isolation	4 kVrms (1 min), 6 kV surge (1.2/50 us)
Protection Rating	IP20
Contact Type	Normally Open (NO), gold-plated silver alloy
Max Output Load	250 VAC, 2 A / 30 VDC, 2 A
Switching Time	On-delay: 3 to 10 ms; Off-delay: 5 to 7 ms

Channel Isolation & Loop Interfacing

The module processes discrete actuation signals through gold-plated silver alloy contacts, isolating high-voltage transients up to Overvoltage Class III (300 V) standards. Optical-to-mechanical isolation boundaries prevent ground potential displacement across the control infrastructure, maintaining system loop integrity during field-side surge occurrences. Built-in fast-acting 2.5 A glass fuses suppress overcurrent events, shielding upstream DCS outputs from field short-circuits.

Frequently Asked Questions

Q: What is the physical clearance requirement for DIN rail snap-mounting?

A: The chassis occupies a 20 mm width profile on standard TS-35 DIN rails. Allow adequate vertical spacing above and below the module for passive convection cooling across the -20 to +70 deg C operating envelope.

Q: How does the unit process inductive load switching on the relay contacts?

A: Switching AC inductive loads requires external arc suppression circuits across the load contacts when power factor cos phi falls below 0.5 to prevent contact degradation beyond the rated 250,000 electrical operations.

Q: Is the internal overcurrent fuse user-replaceable?

A: Yes, the module uses an integrated 2.5 A fast-acting 5 x 20 mm glass fuse accessible on the housing to protect internal relay traces from load circuit shorts.

Field Installation Guidelines

Mount the module on a standard 35 mm DIN rail inside an IP54 or better grounded metallic enclosure to protect the unit from environmental contaminants. Snap the base latch onto the rail, confirming a tight mechanical bond to secure physical grounding path continuity.

Route input power and contact lines separately from heavy motor drive cables and high-voltage AC conductors, maintaining a minimum spacing of 300 mm. Strip field wire leads to specified length and insert them into terminal clamps, torqueing to standard terminal screw tolerances. Ensure the 24 VDC input power source conforms to -15% / +20% voltage limits to guarantee coil pull-in without thermal overload.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.