Digital I/O Module | Yokogawa ADV851-P50 CENTUM VP
Manufacturer: Yokogawa
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Part Number: ADV851-P50
Condition：New with Original Package
Product Type: Digital Input Output Modules
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Country of Origin: Japan
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Yokogawa ADV851-P50 FIO Digital Input/Output Module
The Yokogawa ADV851-P50, also cataloged as the ADV851 Digital Input/Output Module, operates as a dedicated hardware component for simultaneous discrete signal monitoring and field actuation within Yokogawa CENTUM VP and ProSafe-RS control networks. Integrating 32 isolated digital channels arranged as 16 digital inputs and 16 transistor digital outputs, this unit executes high-speed signal processing with Sequence of Events (SOE) timestamping capabilities. Operating on a 24 VDC system potential, it establishes a galvanically isolated interface between process equipment and distributed control logic.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ADV851-P50 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.30 kg |
| Dimensions | 130 mm x 127.2 mm x 32.8 mm |
| Operating Temp | -20 to +60 deg C |
| Power Consumption | 500 mA at 5 VDC (Approx. 6 W) |
| Channel Configuration | 32 total isolated channels (16 digital inputs / 16 digital outputs) |
| Rated Voltage | 24 VDC (Operating range: 19 to 30 VDC) |
| Input Specifications | 20 to 26.4 VDC ON state, <= 5.0 VDC OFF state, 2.5 to 6 mA current draw |
| Output Specifications | Source-type transistor output, 0.5 A per channel max load |
| Isolation | Optical isolation; 2 kV AC for 1 minute (signal to system), 500 V AC between commons |
| Response Time | <= 5 ms (input scan and output refresh cycle) |
Channel-to-Channel Isolation and Loop Diagnostics
The Yokogawa ADV851-P50 features robust channel-to-channel optical isolation with distinct common references every 16 channels, preventing field noise coupling and potential ground loops across CENTUM VP backplane nodes. Integrated diagnostic routines continuously scan internal field supply conditions while onboard transistor output protection circuits safeguard individual channels against external short-circuit and thermal overload conditions. The module also supports configurable digital input filtering (1 to 10 ms debounce) and 1 ms time-resolution SOE event capturing, ensuring accurate fault sequence reconstruction across high-density digital field networks.
Frequently Asked Questions
Q: Does the ADV851-P50 support hot-swapping during active DCS operation?
A: Yes, the module supports online insertion and removal (hot-swap) on active FIO baseplates, provided field wiring terminal blocks are detached or field loop supply power is isolated to prevent transient inductive spikes.
Q: How does the module handle overcurrent conditions on its transistor output channels?
A: Each output channel incorporates built-in short-circuit and thermal overload shutdown circuitry that automatically limits output current and opens the channel drive circuit upon fault detection.
Q: What is the maximum timing resolution achievable for event logging on the input channels?
A: The module supports Sequence of Events (SOE) timestamping with a 1 ms time resolution, allowing precise chronological tracking of field contact state transitions.
Field Installation Guidelines
Mount the ADV851-P50 directly onto the designated FIO node baseplate, pressing firmly until both top and bottom locking levers snap securely into place. Wire field instruments using pressure clamp terminal blocks or dedicated AKB331 pre-assembled cable sets, maintaining strict separation between discrete signal lines and high-voltage AC cables. Connect all cable shields to the dedicated cabinet grounding rail at a single point, ensuring drain wires remain fully insulated across intermediate junction points. Verify that all terminal screws achieve a minimum engagement of 5 full threads to prevent signal disruption in high-vibration control enclosures.