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SKU:9905-971
Woodward 9905-971 Discrete Input Module | 24 Channels
Manufacturer: Woodward
Product No.: 9905-971
Product Type: Discrete Input Module
Product Origin: USA
Payment:T/T, Western Union
Weight: 450g
Shipping port: Xiamen
Warranty: 12 months
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Tavsif
Woodward 9905-971 Technical Overview
The Woodward 9905-971 is an industrial-grade Discrete Input Module designed by Woodward for critical control systems. Featuring a lightweight construction of approximately 0.45 kg (1.0 lbs), it accepts up to 24 contact inputs operating at 24 VDC wetting voltage with a fast 5 ms update time and 1 ms time-stamping resolution. Built with latent fault detection across its relay outputs, this module disengages safely via front-panel ejector handles and secures directly into the control chassis motherboard.
Part Number Breakdown
- 9905: Woodward Control Hardware & I/O Module Series
- -971: Specific Model Designator — 24-Channel 24 VDC Discrete Input Transducer Board
Technical Specifications Table
| Parameter | Specification |
|---|---|
| Manufacturer / Brand | Woodward |
| Full Part Number | 9905-971 |
| Product Type | Discrete Input Module |
| Number of Channels | 24 Channels (4 Modules / 6 Contact Inputs per Module) |
| Discrete Input Voltage | 24 VDC Nominal Contact Wetting Voltage |
| External Power Options | 18–32 VDC or 100–150 VDC External Source |
| Performance Resolution | 5 ms Update Time / 1 ms Time Stamping Resolution |
| Fault Detection System | Latent Fault Detection (Series-Parallel Relay Readback) |
| Physical Weight | Approx. 0.45 kg (1.0 lbs) Standard Module Weight |
| Mounting & Hardware | Chassis Card Guides / Motherboard Connectors with Top & Bottom Retaining Screws |
| Country of Manufacture | United States (USA) |
Key Features & Hardware Configurations
Features 24 isolated inputs, 24VDC wetting, latent fault relay detection, 0.45 kg weight, 5ms update time, and USA origin.
Frequently Asked Questions (FAQs)
Q1: What are the main specs of the Woodward 9905-971 module?
A1: 24 discrete channels, 24 VDC input voltage, 5 ms update time, 1 ms time-stamping, and 0.45 kg weight.
Q2: How does latent fault detection work on this module?
A2: It uses a series-parallel relay configuration with readback circuitry to test relays without altering output state.
Q3: How is contact wetting power provided to the discrete inputs?
A3: Power can be sourced internally (via terminal jumpers 33–35) or externally via 18–32 VDC / 100–150 VDC.
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