39SAMCAN – Siemens APACS+ / QUADLOG Standard Analog Module (ROM 3.05)

Overview

The Siemens 39SAMCAN (Moore) is a Standard Analog I/O Module (SAM) for legacy APACS+ and QUADLOG control systems, running ROM version 3.05. Supported part numbers include 16133-71, 16133-71R, and 16133-71/8, and the module handles 4-20 mA analog input/output signal processing for ongoing operational reliability on installed APACS+/QUADLOG racks.

Seven Star LLC supplies tested Siemens APACS+/QUADLOG analog modules, including the 39SAMCAN, to plants across Oman and the GCC keeping legacy process control systems running without a full platform migration.

Operating Principle

The 39SAMCAN processes 4-20 mA analog input and output signals for the modules and instrumentation connected to its rack position, converting field signals into the digital values the APACS+/QUADLOG processor uses for control and monitoring. Running on 24 VDC supply with current consumption up to 1.0 A, it plugs directly into the existing rack backplane without requiring rack modification.

Status LEDs on the module front face give an immediate visual indication of module health, and its ejector handles allow straightforward extraction and reinsertion during field service, reducing the time needed to swap a suspect module during troubleshooting.

Engineering Design of the 39SAMCAN

The module includes a built-in heat sink to manage thermal load during continuous operation, and is rated for Class I, Division 2, Groups A-D hazardous locations, making it suitable for installation in process areas with a defined hazardous classification rather than only in a clean control room. Its ROM 3.05 firmware is a later revision than the 3.0 version used on the related QLSAMBAN module, reflecting incremental firmware improvements made over the platform’s service life.

As legacy Siemens/Moore stock, the module is supplied as used/refurbished units with a supplier warranty (commonly 30 days from used stock, occasionally longer from sealed new units), since the underlying APACS+/QUADLOG platform is no longer in production and buyers rely on tested secondary-market inventory for exact-fit spares.

Key Features

• Standard Analog I/O Module for APACS+/QUADLOG racks
• ROM version 3.05 firmware
• 4-20 mA analog input/output signal processing
• 24 VDC supply, up to 1.0 A current consumption
• Built-in heat sink for thermal management
• Rated for Class I, Division 2, Groups A-D hazardous locations
• Status LEDs and ejector handles for field service
• Plug-and-play compatible with existing APACS+/QUADLOG racks

Industrial Applications

The 39SAMCAN is used as a direct-fit spare or replacement analog I/O module in legacy Siemens APACS+ and QUADLOG process control racks installed in oil and gas, petrochemical, power generation, and water and wastewater treatment systems. Its hazardous-location rating suits installations in classified process areas as well as general control room racks.

Across Oman, Muscat, Sohar, Salalah, and the GCC, Seven Star LLC supports plants running legacy APACS+/QUADLOG systems as a supplier of tested analog I/O spare modules, helping engineering teams maintain analog signal processing without a costly full-system replacement.

Technical Specifications

Compatibility and Sourcing

Because the underlying APACS+/QUADLOG platform has been out of production for years, engineering teams should confirm the exact ROM version and part-number suffix (16133-71 vs 16133-71R vs 16133-71/8) against their existing rack configuration before ordering — a mismatched ROM revision can behave differently in redundant or safety-related loops even though the physical module fits the same slot. Seven Star LLC tests each analog module before shipment to confirm it powers up correctly and reports healthy status on its LEDs.

Request a Quote for 39SAMCAN – Siemens APACS+ / QUADLOG Standard Analog Module (ROM 3.05)

Contact Seven Star LLC for quotations, availability, and technical support on the Siemens 39SAMCAN Standard Analog Module and other APACS+/QUADLOG legacy spare parts across Oman and the GCC.

How to Identify the Correct Analog Module

Before ordering a replacement Siemens 39SAMCAN, take the details from the module that is already in the rack rather than from drawings, which are often out of date on systems that have been modified over twenty or more years. The label on the module side and the front face normally carry the model designation, the 16133-71 family part number with its suffix, and the ROM revision.

• Record the full part number, including any R or /8 suffix, exactly as printed.
• Note the ROM version (this listing covers ROM 3.05) and compare it with the other analog modules in the same rack.
• Check the slot position and whether the module sits in a redundant or simplex arrangement in the system configuration.
• Photograph the label and send it with your enquiry so the spare can be matched before dispatch.

Installation and Commissioning

Follow your site’s permit and loop-isolation procedure before touching a live rack. Put the affected loops in manual or bypass, inform operations, and wear an ESD strap when handling the module. Use the ejector handles to withdraw the old card squarely, inspect the backplane connector for bent pins or debris, and seat the new module firmly until the handles lock.

Once the module is powered, confirm the status LEDs show a healthy state and that the processor recognises the module in its configuration. Then check each channel end to end with a calibrated loop calibrator: inject known 4-20 mA values on inputs and verify the reading in the operator display, and drive outputs to known values while measuring at the field terminals. Return loops to automatic only after the values agree.

Maintenance and Troubleshooting

• Single channel reading wrong: check field wiring, terminations and the transmitter before blaming the module.
• All channels bad: check the 24 VDC supply at the rack and the module seating, then swap with a known-good spare.
• Module not recognised: compare ROM revision and part-number suffix with the configured module type.
• Intermittent faults: look at cabinet temperature and ventilation; heat sinks need free airflow, which matters in Gulf summer conditions.

Keeping at least one tested spare per module type on site is the most practical protection for a platform that is no longer manufactured.

Sourcing from Seven Star LLC

Seven Star LLC supplies tested legacy APACS+/QUADLOG hardware to operators in Muscat, Sohar, Duqm, Salalah and across the GCC. Send us the part number, suffix and ROM revision from your installed card and we will confirm the match on the Siemens 39SAMCAN before shipment, along with condition, test status and delivery time to site.

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