Product Description 

Woodward 5437-672 Engine Control Module (Economy-type Engine Electronic Control Speed Controller, 5437 Series Basic Model)

I. Product Overview

This is the 5437 series economy-type single-machine dedicated ECM controller from the United States. 5437-672 is the simplified I/O basic version, focusing on single-machine constant-speed control and basic safety for the unit. It features an aluminum shell panel installation and is used for diesel/gasoline engines and small turbine single-machine control. It does not emphasize the distribution of loads among multiple units in parallel. It is the low-end economy version of 5437-687.

Key Technical Parameters Table

Parameter Item Specification Parameters

Power Supply Voltage DC 18～32VDC (nominal 24V, compatible with battery voltage ｄｒｏｐ of 12~36V wide-range input)

Speed Measurement 1 channel magnetic-electric speed sensor, input 4~20000Hz, amplitude 1~30VAC

Analog Input 3 channels 4-20mA/0~5VDC programmable input (oil pressure, water temperature, exhaust gas temperature)

Digital DIO 6 channels multiplexed switch quantity channels (DI contact / transistor DO, no relay without-pull-up output)

Actuation Drive 2 channels ±120mA servo output, direct drive fuel electro-hydraulic actuator

Control Accuracy Steady-state speed control ±0.25% of rated speed

Communication Interface One-way CAN J1939 + RS485 Modbus-RTU (no Ethernet, simplified communication)

Protection Grade IP66 (NEMA4X) cast aluminum housing, dustproof and oil-proof

Operating Temperature -40℃～+85℃ industrial wide-temperature environment

Anti-Vibration 5g (10~2000Hz) mine / marine anti-vibration standard

Dimensions 165×125×55mm, net weight approximately 1.05kg

Safety Certification CE, UL basic certification, basic overspeed two-level protection

Product Performance

Simple and efficient control logic: only supports constant speed / variable speed two control modes, no grid-connected load-sharing algorithm, suitable for single unit independent operation;

Adaptive simple PID: built-in automatic tuning, adaptive adjustment for small load fluctuations, no need for complex on-site parameter setting;

Basic fault diagnosis: probe break, power under-voltage, actuator failure alarm, two-level overspeed shutdown protection (warning + emergency trip);

Parameter power-off saving: non-volatile storage, no configuration loss during power-off;

High environmental tolerance: PCB fully three-proof coating, resistant to engine room oil pollution, salt fog, and electromagnetic interference, suitable for outdoor open-air units.

Application Fields

Standby power generation units: hospital, supermarket, computer room single-unit emergency diesel / gas standby units speed regulation;

Small power equipment: agricultural gas engines, mobile small diesel power generation skid;

Oil and gas small units: oil well head small drive engines, small gas booster pump units;

Industrial small turbines: residual heat micro steam turbines, small air compressor matching prime mover control;

Inland small ships auxiliary machinery: fishing boat, inland small boat single-unit auxiliary motor speed regulation.

Comparison of Complete Models of the 5437 Series Table

Model Product Positioning Configuration Differences

5437-672 Economic Basic Model With fewer I/Os, no Ethernet, does not support multi-machine parallel connection (this model)

5437-682 Enhanced Communication Model With Ethernet interface, supports remote SCADA networking, medium-level I/O configuration

5437-687 Full Function High-End Model Completely equipped I/O, multiple drivers, CAN parallel load distribution (main grid connection model)

5437-691 Heavy-duty Drive Model High-power execution output, suitable for heavy-duty gas turbines, large displacement engines