NWIO-01 64168533
Watchdog & I/O Module - Digital I/O Option Unit with Watchdog Logic
Lifecycle note: Use the unit nameplate and current ABB documentation as final references before approving a replacement.
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+86 15359408275Watchdog & I/O Module · ABB AC 800M / ACS 600 Special I/O
ABB NWIO-01 64168533 is a watchdog and digital I/O option unit used with compatible ABB AC 800M and ACS 600 special-I/O installations.
ABB NWIO-01 64168533 provides two digital inputs for 24 VDC or 115/230 VAC signals, two relay outputs and selectable input filtering, while DO2 can be assigned as the watchdog output.
Before replacing ABB NWIO-01 64168533, verify the complete unit label, installed input voltage, filter setting, X1 watchdog time constant, relay load, optical-ring configuration, CI858 context and control-program function blocks.
| Manufacturer | ABB |
|---|---|
| Model | NWIO-01 |
| Product ID | 64168533 |
| Product type | Watchdog and digital I/O option unit |
| Controller context | AC 800M with CI858 / ACS 600 special I/O |
| Digital inputs | 2 |
| Input voltage | 24 VDC or 115/230 VAC |
| Input filter time | 1 ms or 8 ms, selectable |
| Relay outputs | 2 |
| DO2 function | Normal digital output or watchdog output |
| DC switching rating | 8 A at 24 VDC resistive; 0.4 A at 120 VDC resistive |
| AC switching rating | 2000 VA at 250 VAC |
| Maximum continuous output current | 2 A |
| Watchdog time constant | 1 s default or 0.2 s selectable via X1 |
| Function blocks | NWIO1DI and NWIO1DO |
| Communication context | DDCS optical special I/O ring |
ABB NWIO-01 64168533 combines digital I/O with watchdog supervision for compatible AC 800M or ACS 600 special-I/O installations, so the controller, CI858 context and optical-ring role must match the installed configuration.
ABB NWIO-01 64168533 provides two digital inputs for either 24 VDC or 115/230 VAC signals and supports a selectable 1 ms or 8 ms input filter, so the field voltage and required response time must be confirmed before configuration.
ABB NWIO-01 64168533 provides two relay outputs rated for loads including 8 A at 24 VDC resistive, 0.4 A at 120 VDC resistive or 2000 VA at 250 VAC, with a 2 A maximum continuous output current that must be checked against the connected load.
ABB NWIO-01 64168533 uses DO2 as either a normal digital output or the watchdog output, with watchdog operation enabled by the unit switch, so the switch position and application logic must agree.
ABB NWIO-01 64168533 uses a 1 second watchdog time constant by default or 0.2 second when selected through jumper X1, and the setting must remain compatible with the application execution interval to avoid unwanted trips.
ABB NWIO-01 64168533 operates in a DDCS optical special-I/O ring and is represented by NWIO1DI and NWIO1DO function blocks, so the CI858 connection, node arrangement, program configuration and supported system release must be verified.
To source ABB NWIO-01 64168533, provide the complete nameplate and product ID, hardware revision, field-input voltage, filter and watchdog settings, relay-load data, wiring or optical-ring details, controller context, quantity, condition requirement and destination.
Send the complete NWIO-01 64168533 catalog number, revision, quantity, destination and nameplate photo. Identification details will be checked before quotation.
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