General Information

Core Description

The 5501-1432 is a high-precision bi-polar actuator driver module featuring software-selectable integrating or proportional outputs up to +/- 245 mA, working seamlessly with Woodward MicroNet control systems to deliver deterministic execution and stable valve positioning for critical industrial turbines.

Specific Application

• Industrial Turbine Valve Actuation: Driving heavy-duty electro-hydraulic governors and proportional steam or gas valves requiring up to +/- 245 mA drive currents.
• High-Availability Machinery Control: Functioning inside specialized turbine control networks to regulate critical auxiliary fuel delivery and load-sharing systems.
• Dynamic Position Loop Tracking: Executing fast-response closed-loop positioning routines via software-configured integration parameters.

Ordering Information

System Compatibility

The 5501-1432 bi-polar actuator driver module is fully compatible with Woodward MicroNet Plus and MicroNet TMR chassis environments. It communicates natively over the system backplane with P1020 CPU or 5200CPU modules. The module interfaces with field wiring networks via the dedicated 5437-672 Field Termination Module using standard MicroNet Table K cable selections.

Alternative Model: 5501-1428 / 5501-1429 / 5501-1430 / 5501-1431

Within the same MicroNet hardware family, lower-current variants like the 5501-1431 (+/- 120 mA) or 5501-1430 (+/- 60 mA) serve as direct alternative models depending on target coil ratings.

Key Technical Differences

Maximum Current Output Thresholds
The 5501-1432 provides the highest current output threshold in its product range at +/- 245 mA, whereas alternatives such as the 5501-1431 are restricted to +/- 120 mA, and the 5501-1428 caps output at +/- 12.25 mA.

Actuator Coil Matching Specifications
The current 245 mA module is built specifically to drive large, low-resistance dual-coil or heavy-duty turbine actuators, while lower-current cards match high-impedance small servo valves.

Module Thermal Footprint
Due to managing higher current paths up to 245 mA per channel, the 5501-1432 generates a higher localized thermal dissipation profile compared to the ultra-low current 12.25 mA driver variants.

Field Component Sizing
While all these modules share the same 5437-672 Field Termination Module and Table K wiring layout, the external actuator selection must be strictly aligned with the module's 245 mA electrical limit to prevent component overloading.

Installation & Troubleshooting FAQ

Q1: How do I switch the 5501-1432 output between integrating and proportional driver modes?

A: The operational mode of the bi-polar channels is entirely software-selectable. Field technicians do not need to adjust physical jumpers on the module board. Instead, configuration flags must be defined within the Woodward Graphical Application Program software prior to compiling and downloading the control application to the CPU.

Q2: Which Field Termination Module and cable assembly must be used with this card?

A: The 5501-1432 requires the 5437-672 Field Termination Module to safely break out field instrument terminal connections. Connection between the main chassis slot and the FTM must be established using matching shielded cables designated under Woodward's system-wide Table K specification matrix.

Q3: What does a solid fault indicator or an unexpected zero-current output signify on a channel?

A: This condition typically indicates a field-side open circuit, an excessive loop resistance mismatch, or a shorted actuator coil. The module monitors output feedback continuously. If loop parameters drift outside safe boundaries, the internal circuit safeties trip the affected channel. Verify coil resistance at the 5437-672 FTM terminal strips.

Q4: Can the 5501-1432 module be used in both Simplex and TMR chassis?

A: Yes. The module is fully compatible with both MicroNet Plus and MicroNet TMR frameworks. When deployed in a TMR kit environment, specialized redundant cabling configuration paths must be routed to handle voted relay tracking configurations safely.

Q5: Why is my turbine valve sluggish when driven by a lower-tier alternative card instead of the 5501-1432?

A: Sluggishness indicates that the actuator coil requires higher power to overcome mechanical spring forces. If a +/- 120 mA card is mistakenly used where a +/- 245 mA module is specified, the actuator coil will be starved of necessary current, leading to degraded response times or complete failure to hit valve travel setpoints.