Woodward 9905-971 Discrete Input Module - 16 Channel 24 VDC Inputs with 1 ms Scan Rate for Industrial Control Systems

Price Negotiable

Price: $10-3000

MOQ: 1 piece

Delivery Time: 3-5 work days

Brand: Woodward

Product Description

Product Overview

The Woodward 9905-971 is a factory-built, rack-mounted discrete input module designed for MicroNet Plus and Atlas control systems. This 16-channel module delivers reliable 24 VDC input monitoring with fast scanning, line-fault detection, and hot-swap capability for critical industrial applications.

Key Features & Benefits

16 opto-isolated 24 VDC inputs supporting sink or source configurations
Fast 1 ms configurable scan rate with sequence of events time-stamping under 1 ms
Individual channel LED diagnostics showing ON, OFF, and fault status
Hot-swappable installation in MicroNet Plus or Atlas racks without system restart
Wide operating temperature range from -40 °C to +70 °C with conformal-coated PCB
Dual redundant 24 VDC power feeds for maximum system availability
Comprehensive certifications including CE, UL Listed, ABS, ATEX, and IECEx Zone 2
100% OEM Woodward product with serialization and anti-static packaging

Technical Specifications

Parameter	Specification
Part Number	9905-971
Series	Woodward MicroNet Plus / Atlas
Function	Discrete Input (DI)
Channels	16
Input Voltage	24 VDC nominal (18-32 VDC range)
Input Current	2.3 mA @ 24 VDC
Isolation	500 VAC channel-to-bus
Filter Time	0-65 ms (1 ms default)
Scan Rate	1 ms per channel
Power Requirements	24 VDC ±10%, 5 W maximum
Operating Temperature	-40 °C to +70 °C
Humidity Range	5% to 95% RH non-condensing
Mounting	8-slot or 16-slot MicroNet rack
Certifications	CE, UL Listed, ABS, ATEX Zone 2, IECEx

Typical Applications

Gas and steam turbine control panels
Industrial engine generator set packages
Compressor and pump skid interlocks
Marine propulsion and auxiliary systems
Plant emergency shutdown (ESD) status monitoring

Package Contents

1 x 9905-971 discrete input module
1 x Removable 40-pin spring-clamp terminal block
Factory calibration certificate and traceability label
Quick-install guide and ESD wrist strap

Installation & Setup

Insert module into any available MicroNet Plus or Atlas rack slot
Connect 24 VDC field power and discrete signals to removable terminal block
Power up rack - green READY LED illuminates within 5 seconds
Launch Woodward GAP or Control Assistant software for auto-detection and tag assignment
Perform I/O loop testing and verify line-fault diagnostics