DIGITAL FIELD SIGNAL LEDGER / LINKNET LEGACY I/O
16-channel 24 VDC discrete input node for compatible LON-based LINKnet systems
| 16 | DISCRETE INPUT CHANNELS On/off field states for the control application |
24 VDC | NOMINAL INPUT TYPE 13.1 mA per channel when on |
9905-971 is the Woodward LINKnet 16-channel discrete input module identified in Woodward product manuals and lifecycle notices. It is a first-generation LON-based LINKnet node intended for compatible installed systems; selection requires the exact model, controller architecture, node address and wiring to be verified.
| Ordering field | Quotation basis |
|---|---|
| Brand / part number | Woodward / 9905-971 |
| Product family | LON-based LINKnet distributed I/O |
| Condition | Brand-new, unused unit; exact label, revision and factory packaging status confirmed in the formal quotation |
| Availability / lead time | Subject to current stock and confirmed with quotation |
| Warranty | 12-month warranty from the date of delivery, subject to the written warranty terms in the formal quotation |
| Supply scope | One module unless terminals or accessories are specifically listed |
The following values describe the discrete-input LINKnet module type published by Woodward. Confirm the label, revision and installed system before ordering.
| Number of channels | 16 discrete inputs |
| Nominal input voltage | 24 VDC |
| Input current when on | 13.1 mA per channel at 24 V |
| Module power required | 6.5 W at 24 V input |
| Published temperature range | −40 to +55 °C |
| Hazardous-location listing | UL Listed Component, Class I, Division 2, Groups A, B, C and D when wired to the applicable NEC method |
| Shock / vibration reference | US Mil-Std-810, 30 G sine at 11 ms; US Mil-Std-167, 18–50 Hz |
| EMC reference | Emissions EN 55011 Class A Group 1; immunity EN 50082-2 |
Each channel brings a two-state field command into the Woodward control application. Typical logic assignments depend on the controller program and may include permissives, interlocks, status contacts or operator commands. In a Woodward manual example using a nine-node LINKnet arrangement, the 9905-971 discrete-input node is assigned network address 7; other compatible control applications may use different designated addresses.
Do not copy an address from a generic example. Record the installed node address and confirm it against the actual control application before replacement.
| Reference | Architecture | Function | Selection note |
|---|---|---|---|
| 9905-971 | LON-based LINKnet | 16 discrete inputs, 24 VDC | Legacy spare for compatible installed systems |
| 8200-1204 | CANopen-based LINKnet HT | 16 discrete inputs | Migration option requiring hardware and software review |
The two references use different network architectures. Do not treat 8200-1204 as a plug-in direct replacement for 9905-971. Woodward states that migration requires hardware and software changes.
Is 9905-971 an analog input module?
No. Woodward identifies 9905-971 as a sixteen-channel 24 VDC discrete input module.
Can 8200-1204 directly replace it?
No direct substitution should be assumed. The newer module uses the LINKnet HT architecture and requires an engineering review of hardware and software changes.
Are terminals and network accessories included?
Only items stated in the formal quotation are included. Request confirmation of terminal blocks, cables and other accessories.
How is the available unit described?
The quotation should state condition, testing status, serial or label details, supply scope, warranty, availability and lead time.
What should be supplied for model verification?
Provide the installed nameplate, controller model, node address, quantity, destination country and required delivery date.
LEGACY I/O PROCUREMENT RUNWAY
A six-stage service route built around technical clarity, documented terms and international shipment.
| 01 IDENTIFY |
02 VERIFY |
03 QUOTE |
04 PREPARE |
05 DISPATCH |
06 SUPPORT |
We review the full 9905-971 reference, label photo, revision, installed controller, node address, quantity and requested condition.
The review distinguishes the legacy LON-based LINKnet node from newer LINKnet HT hardware and records any compatibility questions before quotation.
The formal quotation states condition, testing basis, included items, availability, lead time, warranty, payment and shipment terms.
Part-number and label checks are completed against the order. Protective and ESD-aware packing is selected for the electronic module.
Shipment tracking and available export documents are provided. Carrier and Incoterms follow the accepted quotation.
Inspect the package and label promptly after delivery. Report discrepancies with the order reference, packaging photos, module label and a clear issue description. Written return authorization is required before any return shipment.
| Include in the inquiry | Why it matters |
|---|---|
| Module and nameplate photos | Supports exact reference and revision review |
| Controller and node address | Supports LINKnet architecture and application review |
| Quantity and destination | Supports availability, freight and lead-time planning |
| Required condition and date | Defines the commercial requirement |
WOODWARD ADVANTAGE MODEL INDEX
The first entries prioritize the 9905 LINKnet family, followed by other Woodward references from our advantage-product directory.
| Model reference | Model reference | Model reference | Model reference | Model reference |
|---|---|---|---|---|
| WOODWARD 9905-678 | WOODWARD 9905-760 | WOODWARD 9905-966 | WOODWARD 9905-967 | WOODWARD 9905-968 |
| WOODWARD 9905-969 | WOODWARD 9905-970 | WOODWARD 9905-971 | WOODWARD 9905-972 | WOODWARD 9905-973 |
| WOODWARD 8200-1200 | WOODWARD 8200-1201 | WOODWARD 8200-1202 | WOODWARD 8200-1203 | WOODWARD 8200-1204 |
| WOODWARD 8200-1205 | WOODWARD 9903-466 | WOODWARD 9905-211 | WOODWARD 9905-212 | WOODWARD 9905-213 |
| WOODWARD 9905-214 | WOODWARD 9905-215 | WOODWARD 9905-216 | WOODWARD 9905-457 | WOODWARD 9905-468 |
| WOODWARD 9905-494 | WOODWARD 9905-020 | WOODWARD 9905-021 | WOODWARD 9905-022 | WOODWARD 9905-023 |
| WOODWARD 9905-024 | WOODWARD 9905-025 | WOODWARD 9905-026 | WOODWARD 9905-027 | WOODWARD 9905-028 |
| WOODWARD 9905-029 | WOODWARD 9905-030 | WOODWARD 9905-031 | WOODWARD 9905-032 | WOODWARD 9905-033 |
| WOODWARD 9905-034 | WOODWARD 9905-035 | WOODWARD 9905-036 | WOODWARD 9905-037 | WOODWARD 9905-038 |
| WOODWARD 9905-039 | WOODWARD 9907-018 | WOODWARD 9907-019 | WOODWARD 9907-023 | WOODWARD 9907-024 |
