Eaton Durant 57601-402 Ambassador Totalizer & Counter

Eaton Durant 57601-402 Ambassador Series Totalizer / Count Control

The Eaton Durant 57601-402 is a multi-function electronic counter/control engineered for demanding marine automation, plant floor batching, and high-integrity process measurement. Operating on a 115 VAC (50/60 Hz) primary supply, the unit integrates three distinct counting registers: an 8-digit cumulative totalizer, a 6-digit single-preset main counter, and a 6-digit single-preset batch counter, accompanied by an independent event-time ratemeter.

Built within a compact 68 x 68 mm DIN housing sealed to NEMA 4 / IP65 on the front bezel, the 57601-402 delivers deterministic accuracy in harsh, electrically noisy environments. Featuring an integrated RS-485 half-duplex multi-drop communications interface, depluggable screw-clamp terminal blocks, scalable count/rate mathematics, and versatile transistor/relay outputs, this instrument excels in fuel consumption tracking, shaft RPM monitoring, cut-to-length machinery, and cargo transfer systems.

Model Details

• Manufacturer: Eaton Corporation
• Product Line: Ambassador Series Count Control
• Model Number: 57601-402
• Part Number / MPN: 57601402
• Configuration: 8-Digit Totalizer / 6-Digit Single Preset Counter / 6-Digit Batch Counter / Ratemeter
• Display Type: 2-line x 16-character backlit alphanumeric LCD
• Serial Interface: RS-485 Half-Duplex (Addressable 01–99)

Technical Specifications

Features

1. Tri-Register Architecture: Integrates an 8-digit cumulative totalizer with dual 6-digit registers (Main Count and Batch Count) to support simultaneous batch control, piece counting, and master volume accounting.
2. Industrial Output Matrix: Furnishes one heavy-duty SPDT form-C mechanical relay and two high-speed NPN open-collector transistor outputs configurable for latched, pulsed (0.01 to 99.99 s), or reverse logic.
3. Network Integration via RS-485: Embedded multi-drop serial communications bus allows remote setup, real-time register extraction, and automated SCADA/PLC handshaking over long transmission lines.
4. Rugged Front Panel Sealing: NEMA 4 / IP65 front face with an 8-key tactile membrane prevents washdown moisture, lubricating oils, and saline ingress into electrical compartments.

Compatibility

• Rotary Pulse Generators & Incremental Encoders: Compatible with BEI Sensors, Dynapar, Dynapar Series 60, EPC (Encoder Products Company), Heidenhain, and Omron 5V to 24V differential/push-pull/open-collector quadrature encoders.
• Proximity Switches & Photoelectric Transducers: Directly compatible with all 2-wire and 3-wire DC NPN or PNP proximity sensors (Turck, Pepperl+Fuchs, Balluff, Sick, IFM Efector).
• Marine Flowmeters & Positive Displacement Meters: Pairs directly with positive displacement flowmeters (e.g., Oval, Emerson Micro Motion pulse transmitters, Badger Meter, Liquid Controls) for fuel oil bunker measurement and ballast flow monitoring.
• Legacy Drop-In Replacements: Fits legacy cutout cutouts for older Durant Ambassador, Durant President Series (e.g., 5881-series, 5882-series), and Kessler-Ellis Products (KEP) multi-function units.

Frequently Asked Questions

What is the primary difference between Eaton Durant 57601-402 and 57601-400?

The Durant 57601-400 is strictly a totalizer and rate indicator with basic transistor outputs. The 57601-402 includes the 8-digit totalizer and ratemeter, but adds a 6-digit single-preset main counter, a 6-digit batch counter, and a 5A SPDT output relay, allowing for active machine batching and process cutoff operations.

Does the Eaton Durant 57601-402 require a battery backup to retain counts during a blackout?

No. The 57601-402 incorporates internal non-volatile EEPROM memory. In the event of an engine room blackout or mains supply disconnection, all accumulated totalizer values, batch counts, preset levels, and configuration parameters are preserved indefinitely.

How do I configure the totalizer scale factor for custom engineering units?

Using the front-panel membrane keypad, navigate to the PROGRAM: SCALERS menu. The count scale factor can be programmed between 0.00001 and 9.99999, and the floating decimal point can be positioned anywhere across the display. This converts incoming pulses directly into standard engineering readouts such as Liters, Gallons, Cubic Meters, Millimeters, or Feet.

What is the panel cutout dimension required for mounting?

The Eaton Durant Ambassador series adheres to the standard 68 x 68 mm DIN bezel specification. The physical panel cutout required is 65 mm x 65 mm (2.56 x 2.56 inches), with a clear depth behind the mounting surface of at least 125 mm (4.92 inches) to accommodate depluggable field wiring plugs.