Description
Yokogawa ADV151-P50/D5A00 Digital Input Module
The Yokogawa ADV151-P50/D5A00, also cataloged as the ADV151 Digital Input Module, serves as a 32-channel 24 VDC discrete signal acquisition interface for ON/OFF field contacts within Yokogawa distributed control system I/O architectures. Configured for isolated input scanning with pressure clamp and KS cable interface options, the Yokogawa ADV151-P50/D5A00 (ADV151 Digital Input Module) provides direct electrical state sampling and conversion into system-level digital process image data.
Suffix Breakdown & Model Matrix
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P: Pushbutton input function enabled
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5: No status display, no explosion protection configuration
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0: Basic type variant
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/D5A00: KS cable interface adapter for 32-channel digital input (ATD5A-00)
Hardware Specifications
| Parameter |
Specification |
| ModelBrand |
Yokogawa ADV151-P50/D5A00 |
| Origin |
Japan |
| Weight |
0.3 kg |
| Dimensions |
Not specified |
| OperatingTemp |
Not specified |
| PowerConsumption |
5 VDC backplane, max 500 mA |
| Input Channels |
32 channels (isolated) |
| Rated Input Voltage |
24 VDC (sink/source) |
| Input ON Voltage |
18 to 26.4 VDC |
| Input OFF Voltage |
5 VDC or less |
| Input Current |
4.1 mA +/-20 percent per channel |
| Max Input Voltage |
30 VDC |
| Withstanding Voltage |
2 kV AC (input-system, 1 min); 500 VAC (common, 1 min per 16 channels) |
| Response Time |
8 ms or less |
| External Connection |
Pressure clamp terminal, AKB331, MIL connector cable |
Channel Isolation and 24 VDC Discrete Input Conditioning (DCS Architecture)
The ADV151 input architecture implements per-channel electrical isolation for 24 VDC discrete signal acquisition. Each input channel is routed through isolated sensing circuitry prior to backplane digitization, reducing electrical interaction between adjacent channels under dense wiring configurations.
From a process control perspective, the module performs binary state conversion from field contact inputs into scan-cycle synchronized logic signals within the DCS input image table. The 18 to 26.4 VDC ON threshold window and 5 VDC OFF threshold define the electrical discrimination band for stable contact state detection under varying loop resistance conditions.
The KS cable interface option (ATD5A-00) allows structured 32-channel aggregation, while maintaining independent channel electrical paths and preserving isolation characteristics.
Frequently Asked Questions
Q: Can the module be hot-swapped while field wiring is energized?
A: Backplane insertion capability depends on rack design. Field inputs should be de-energized to avoid transient coupling into input sensing circuits.
Q: Does each channel operate independently?
A: Each channel is individually isolated at the input sensing stage; however, common grouping exists every 16 channels for withstand voltage structure.
Q: Does response time vary with input wiring method?
A: Response time (8 ms or less) is defined by internal filtering and scan-cycle synchronization and is not affected by external termination type.
Field Installation Guidelines
Install the module into a compatible Yokogawa ADV151 series I/O rack ensuring full backplane connector engagement. Maintain correct polarity for 24 VDC field wiring to prevent reverse bias stress on input detection circuits.
Use twisted pair wiring for long distance digital input runs and ensure shield continuity is terminated at a single-point cabinet ground. Separate input wiring from power and relay output cabling to reduce inductive coupling.
Pressure clamp and cable interface connections (AKB331 / MIL / KS adapter) must be mechanically secured to maintain stable contact resistance under vibration conditions.
