Purpose
Series affiliation: 9905 LinkNet I/O series, compatible with Woodward 2301A, EPG, DSLC, NetCon and other control systems.
Core function: 16 independent isolated dry contacts/switch inputs, collecting “on/off” status signals.
Typical applications: generator start stop, valve position, pump status, safety interlock, alarm contacts, operation status monitoring.

Parameter
Model 9905-971 (Rev J)
Number of channels: 16 independent isolated discrete inputs
Input type: Dry Contact/Passive Switch
Power supply 18-32 VDC (typical 24VDC), power consumption 14.2W
Isolation between channels/channel backplane high isolation (500V+)
Explosion proof Class I, Div 2, Groups A/B/C/D (applicable to hazardous areas)
Working temperature -40 ° C to+55 ° C (T4A)
Communication LinkNet (LON) distributed I/O bus
Weight approximately 0.65kg

Function
16 channel high-capacity switch acquisition: A single module supports 16 independent dry contacts, greatly improving system integration.
Dedicated for dry contacts: No external power supply required, directly connected to passive switches/relays, simple and reliable wiring.
High isolation and anti-interference: Electrical isolation between channels, suitable for industrial strong electromagnetic environments, ensuring signal stability.
Distributed I/O architecture: Remote deployment through LinkNet bus, reducing on-site wiring and improving system scalability.
Industrial grade reliability: wide temperature range, explosion-proof, anti vibration design, meeting harsh working conditions such as power plants, oil and gas, ships, etc.
Status indication: Each channel is equipped with LED, which intuitively displays the on/off status.

WOODWARD 9905-971｜ Discrete Input Module｜