R. STAHL 9160/13-11-11s Transmitter Supply Unit

Overview

R. STAHL 9160/13-11-11s is a DIN-rail-mounted Ex i isolating amplifier from the Series 9160 transmitter supply unit family, engineered to power and interface intrinsically safe 2-wire and 3-wire field transmitters located in Zone 0, 1, 20, or 21 hazardous areas. The unit accepts a 0/4–20 mA HART-compatible input from the field transmitter, supplies its intrinsically safe loop power, and delivers a fully isolated 0/4–20 mA output signal to the control system, making it a core building block of any Ex i measurement loop feeding a DCS, PLC, or SCADA platform.

As the official trusted supplier and regional supplier for R. STAHL, Seven Star LLC proudly supplies the 9160/13-11-11s and the wider ISpac isolator range to end users, EPC contractors, and system integrators throughout the Sultanate of Oman and the GCC. Every unit is supplied with manufacturer ATEX/IECEx documentation and local technical support, giving instrumentation teams in Muscat, Sohar, and Salalah a dependable source for certified Ex i isolators, with lead time confirmed at quotation.

Operating Principle

Internally, the 9160/13-11-11s limits the voltage and current it can deliver into the field-side loop to values below the ignition energy of the specified gas group, so the transmitter connection itself is intrinsically safe regardless of what happens on the safe-area side of the unit. Three-way galvanic isolation separates the field circuit, the output signal circuit, and the 24 V DC auxiliary supply, so a fault on any one side—including a short circuit or an accidental application of mains voltage—cannot propagate into the hazardous-area wiring or damage connected control-system inputs.

Because the R. STAHL 9160/13-11-11s is fully transparent to HART communication in both directions, a handheld communicator or asset-management system in the control room can poll, configure, and diagnose the field transmitter exactly as if it were wired directly, without any loss of digital data across the barrier. The practical consequence is a measurement loop that combines certified intrinsic safety with full HART diagnostics, so plant engineers get explosion protection without giving up the predictive-maintenance data modern transmitters are designed to provide.

Engineering Design of the R. STAHL 9160/13-11-11s

The 9160/13-11-11s is housed in a slim 17.6 mm wide plastic module designed for direct snap-mounting onto standard NS35/7.5 or NS35/15 DIN rail inside a marshalling cabinet or junction panel, allowing dense packing of isolator channels in racks with limited panel width. Removable screw terminals on both the field-side and system-side connections allow the module to be swapped without disturbing adjacent wiring, which shortens maintenance windows during a shutdown or module replacement.

On the R. STAHL 9160/13-11-11s, front-panel LED indication shows power and channel status at a glance, and the unit accepts a 24 V DC nominal auxiliary supply across an 18–31.2 V DC range, matching the standard control-cabinet power bus used across most GCC process facilities. Its rated ambient operating range of -20°C to +70°C for single-unit mounting covers the great majority of indoor marshalling-cabinet environments found in regional oil, gas, and petrochemical plants, even where cabinet cooling is marginal during peak summer conditions.

Key Features

The R. STAHL 9160/13-11-11s combines robust intrinsic safety with practical panel-building convenience. The R. STAHL 9160/13-11-11s’s key features include:

• Ex i field circuit rated for Zones 0, 1, 2, 20, 21, and 22 under ATEX and IECEx approval.
• Transparent bidirectional HART signal transmission for full field-transmitter diagnostics and configuration.
• Three-way galvanic isolation between field circuit, output signal, and auxiliary power.
• SIL 2 rated per IEC 61508 for use in safety instrumented functions.
• Compact 17.6 mm DIN-rail housing for high-density marshalling cabinet layouts.
• 24 V DC nominal auxiliary supply across an 18–31.2 V DC operating range.
• Output load capability up to 600 Ω on standard terminals for long control-room cable runs.
• Wide ambient operating range of -20°C to +70°C suited to regional cabinet conditions.

Industrial Applications

The R. STAHL 9160/13-11-11s is specified wherever a 4–20 mA transmitter—pressure, level, flow, or temperature—is installed in a classified hazardous area and must report back to a control system located in a safe area. Typical applications include tank farm level and pressure transmitters, wellhead and pipeline pressure monitoring, compressor and pump process instrumentation, and any Ex i loop feeding a safety instrumented system where SIL 2 documentation is required by the plant’s functional safety case. The R. STAHL 9160/13-11-11s’s transparent HART pass-through also makes it the preferred choice on projects where predictive-maintenance software needs live access to transmitter diagnostics from the control room.

In Oman and the GCC, Seven Star LLC distributes the 9160/13-11-11s to upstream and downstream oil and gas operators, refineries, and petrochemical complexes across Oman and the wider GCC, including projects in the Sohar and Salalah free zones and Duqm’s expanding industrial base. Instrumentation teams standardizing marshalling-cabinet designs around certified Ex i isolators, or replacing obsolete isolator models during a control-system migration, rely on our documentation support and confirmed lead times to keep commissioning schedules on track.

Technical Specifications

The table below summarizes the principal ratings for the R. STAHL 9160/13-11-11s Ex i transmitter supply unit.

Request a Quote for R. STAHL 9160/13-11-11s

For the R. STAHL 9160/13-11-11s, instrumentation and EPC teams across Oman and the GCC can request a formal quotation for the R. STAHL 9160/13-11-11s Ex i transmitter supply unit directly from Seven Star LLC’s instrumentation division. In Oman and the GCC, we supply on request with lead time confirmed at quotation, provide the full ATEX/IECEx technical datasheet on request, and support marshalling-cabinet specification, replacement, and SIL documentation for both new-build and brownfield hazardous-area projects. Contact our team today to confirm lead time, pricing, and certification paperwork for your next shutdown or turnaround.

Browse the full R. STAHL range or see more Isolator & Barrier products supplied by Seven Star LLC in Oman and the GCC.