The Yokogawa NFDV551-P60, also cataloged as the NFDV551 Digital Output Module, operates as a dedicated hardware component for driving solid-state field loads within STARDOM and CENTUM VP industrial automation networks.
| Parameter | Specification |
|---|---|
| Model | NFDV551-P60/D5S10 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 200 g |
| Dimensions | 90 x 60 x 30 mm |
| Operating Temp | -40 to 80 deg C |
| Power Consumption | 3 W |
| Output Channels | 32 |
| Rated Applied Voltage | 24 VDC |
| Load Voltage Range | 20.4 - 26.4 VDC |
| Output Type | Current-sink transistor output |
| Maximum Load Current | 100 mA per channel @ 26.4 VDC |
| Leak Current (OFF) | 0.1 mA or less |
| Output Response Time | 3 ms or less |
| Isolation Voltage | 2000 VAC for 1 minute (Output to system) |
The module utilizes optocouplers to establish rigid galvanic separation between the internal backplane logic and external field wiring. This loop topology integrates channel-to-channel group isolation rated at 500 VAC between individual 16-channel common paths. The integrated /D5S10 terminal configuration provides transient surge absorption directly across the 24 VDC line loops to prevent back-EMF spikes from inductive actuators from degrading the switching transistors. Furthermore, the unit features configurable fallback safety states, allowing the output logic to execute explicit HOLD or FORCE OFF operations when backplane communication faults are detected.
Q: What physical limitations govern the hot-swap capability of this module?
A: Hot-swapping must be executed only when the backplane is in a stable state and the specific field-side common terminal block is isolated from active 24 VDC power lines to prevent terminal arcing.
Q: How does the module handle inductive load configurations without damaging the internal circuits?
A: The module relies on the integrated /D5S10 surge absorber terminal matrix to suppress voltage spikes. If driving high-current external relays, external flywheel diodes must be wired in parallel across the load.
Q: What is the maximum allowable backplane current draw for the logic circuitry?
A: The module draws a maximum of 700 mA from the 5 VDC system backplane logic power supply rail.
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