Siemens 353A4F1NNNNNNA4 Moore Process Controller

Siemens 353A4F1NNNNNNA4 Moore Process Automation Controller

The Siemens Moore 353A4F1NNNNNNA4 is a digital process automation controller engineered for mission-critical marine, offshore, and heavy industrial plant control loops. Built on the Moore Design Level “A” architecture, this standalone single/multi-loop controller executes advanced continuous PID regulatory control, cascade configurations, ratio calculations, batch sequencing, and discrete interlock logic within a compact DIN-panel instrument case.

The controller features an integrated operator interface with a vacuum fluorescent digital display, dual bar graphs for PV (Process Variable) and SP (Setpoint), and dedicated pushbuttons/rotary pulser knob for bumpless Manual/Auto transfer. Fitted with an internal universal wide-range AC power supply (85–264 VAC) and the extended 52-terminal connection housing with an integrated local I/O expander board, the 353A4F1NNNNNNA4 delivers comprehensive analog and discrete field instrumentation connectivity.

Model Details

• Model/MPN: 353A4F1NNNNNNA4
• 353A: Model 353 Process Automation Controller, Design Level “A
• 4: Enclosure / Rear Case Execution – 52-terminal rear connector block configuration with direct-entry screw terminal headers and rear RJ45 Ethernet port cut-out
• F: Operator Display Assembly – Standard full-feature operator faceplate with digital alphanumeric display, dual bargraphs, pushbuttons, and tactile optical pulser knob
• 1: Expansion Board Option – Fitted with Local I/O Expander Board (adds expanded discrete, universal analog, and electromechanical relay channels)
• NNNNNN: Communications & Firmware Options – Standard factory execution (no supplemental fieldbus daughterboards fitted; standard MPU firmware)
• A: Power Supply – 120/240 VAC nominal (85 to 264 VAC, 47–63 Hz)
• 4: Modification / Agency Approval Level – Standard industrial & hazardous location approvals (Class I, Div 2 / Marine classification compliant)

Technical Details

Features

1. Integrated Multi-Loop Regulatory & Logic Execution: Pre-configured function blocks support single-loop, cascade, feedforward, ratio, override control, and user-programmable sequence logic executed at deterministic update cycles down to 20 ms.
2. High-Density Rear Terminal Architecture (52 Terminals): Built with direct screw-terminal plug-in connectors providing comprehensive wiring termination for analog current/voltage loops, RTDs, thermocouples, and digital pulse contacts.
3. Factory-Fitted Local I/O Expander Card: Augments the base MPU board with isolated universal analog inputs, high-speed frequency/digital inputs, SPDT mechanical relay dry contacts, and analog outputs.
4. Industrial-Grade Marine-Ready Hardware: Conformal coated printed circuit boards provide resistance against high humidity, condensation, saline mist, and engine room vibration profiles.
5. Built-in 25 VDC Field Transmitter Loop Power: Integrated isolated 25 VDC (120 mA) auxiliary power rail drives up to three 2-wire 4–20 mA field transmitters directly without external bulk power supplies.

Compatibility

• Moore 352 / 352P Single-Loop Controllers: Direct functional drop-in replacement (panel adapters and terminal mapping kits allow direct migration from legacy 352 series).
• Moore 351 Triple-Loop Controllers: Direct loop and logic replacement using multi-loop function blocks.
• Siemens Moore Procidia System: Interoperable with iConfig engineering work tools and Moore Enterprise Console DCS over Modbus/Ethernet protocols.

Part Number Cross-References

• Direct Interchange Numbers: 353A4F1NNNNNNA4, 353A4F1NNNNNNAW, TGX:353A4F1NNNNNNA4
• Field Conversion / Service Kits:
  • I/O Expander Board Field Kit: PN 16353-52
  • Range Resistor & CJC Kit (250Ω shunts): PN 16353-49
  • Display Assembly Replacement Kit: PN 16353-40 (Design Level A)
  • Configuration Cable (MMJ to DB9): PN 16353-61

Frequently Asked Questions

What does the model code 353A4F1NNNNNNA4 indicate?

It defines a Siemens Moore 353 Design Level “A” controller with a 52-terminal case, full-function operator front panel with pulser knob, internal 120/240 VAC power supply, and a factory-fitted I/O expander board providing additional universal analog, discrete, and relay outputs.

Can the Siemens 353A4F1NNNNNNA4 directly power 4–20 mA field transmitters?

Yes. The controller provides an internal +25 VDC (±3 V) regulated auxiliary power rail on Terminal 7 capable of delivering up to 120 mA. This powers multiple standard 2-wire loop transmitters without requiring external 24 VDC power supply bricks.

How do I configure 4–20 mA current loops on the standard analog inputs?

The primary analog inputs (AIN1–AIN4) read 1–5 VDC. To accept a standard 4–20 mA process input signal, bridge a 250-ohm, 0.1% tolerance resistor across the (+) and (-) input terminals of that channel, which converts the 4–20 mA current loop into the 1–5 VDC drop required by the analog-to-digital converter.

Is this unit compatible with older Moore 352 or 352P controllers?

Yes. The Model 353 serves as the direct evolutionary upgrade for obsolete Moore 352 and 352P loop controllers. It uses comparable algorithm function block logic, fits into similar DIN panel cutouts using adapter bezels, and supports matching loop control schemes.

Can the configuration program be transferred without connecting a laptop?

If your controller contains the optional Real-Time Clock / Configuration Board (RTC/CB), the entire operating firmware database and parameter setup are preserved on the card. You can swap the card out of the damaged unit into the replacement 353A chassis to resume operation without reprogramming. Alternatively, you can configure the unit directly via the front keypad and pulser knob.