R. STAHL ISpac 9001 Series 1-Channel Isolating Barrier / Repeater Power Supply, 0/4-20 mA, SIL 2, ATEX/IECEx/UL, DIN Rail, Model 158351

In a chemical processing plant, a technician needs to safely transfer a 4-20 mA signal from a transmitter located in a hazardous area to the control system in the safe area. The R. STAHL 158351 isolating barrier, part of the ISpac 9001 series, provides intrinsic safety isolation and signal conditioning for one channel, ensuring reliable data transmission while protecting the system from potential explosions.

Key specifications

• Function: Repeater power supply / isolating barrier
• Number of channels: 1
• Input signal: 0/4-20 mA (from hazardous area)
• Output signal: 0/4-20 mA (to safe area)
• Supply voltage: 20 - 35 V DC
• Explosion protection type: Intrinsic Safety (Ex i)
• Safety Integrity Level (SIL): SIL 2 (IEC 61508)
• Galvanic isolation: Yes (input / output / auxiliary power)
• Mounting type: DIN rail (35 mm)
• Operating temperature: -20 °C to +70 °C
• Degree of protection: IP20
• Connection type: Pluggable screw terminals
• Power consumption: Max. 1.5 W
• Response time: < 10 ms
• Accuracy: < 0.1% of full scale
• Housing material: Polyamide
• Certifications: ATEX, IECEx, UL
• Application: For operating 2-wire transmitters in hazardous areas

Why choose it

This isolating barrier provides galvanic isolation between hazardous and safe areas, preventing ground loops and ensuring signal integrity. With SIL 2 certification, it is suitable for safety-related applications, and its compact DIN rail mounting simplifies installation in control cabinets.

Ideal use cases

• Process automation in chemical, pharmaceutical, and oil & gas industries
• Connecting 2-wire transmitters in hazardous areas to PLC/DCS systems
• Signal conditioning and isolation for 0/4-20 mA loops

Good to know

The device operates from a 20-35 V DC supply and has a low power consumption of 1.5 W. Its pluggable screw terminals allow quick wiring and maintenance. The polyamide housing provides durability in industrial environments.