Configured for Specific Technical Task in CENTUM VP / CS 3000 Field Control Stations, the YOKOGAWA ADM11-S1 (ADM11 Contact Input Module) provides direct physical/electrical execution.
| Parameter | Specification |
|---|---|
| Model | ADM11-S1 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 3.0 kg (Shipping Weight) / 0.8 kg (Net Weight) |
| Dimensions | 260 x 180 x 60 mm |
| Operating Temp | -10 deg C to +60 deg C |
| Power Consumption | 24 VDC nominal |
| Channels | 16 |
| Signal Types | 4-20 mA DC, 0-10 V DC |
| Resolution | 16-bit A/D conversion |
| Accuracy | +/-0.1% of full scale |
| Input Impedance | 250 Ohm (current input), high impedance (voltage input) |
| Isolation | Galvanic isolation per channel |
| Diagnostics | Open-circuit and short-circuit detection |
| Mounting | Rack-mounted |
To prevent electrical interference and ground loops in high-density process environments, the module utilizes individual channel-to-channel galvanic isolation. Optocouplers physically decouple the field-side analog signals from the internal system backplane logic. This architecture suppresses common-mode noise and protects the central processor from high-voltage surges originating on field loops. The integrated 4-20 mA HART loop protocol support permits digital signal modulation over the analog current loop, facilitating diagnostics without interrupting the primary analog variable transmission.
Q: Does the module support hot-swapping during active station operation?
A: Yes. The module is designed for online maintenance within the CENTUM rack, allowing replacement without interrupting power or signal transmission to adjacent modules in the field control station.
Q: How does the module react to a loop open-circuit condition on a 4-20 mA channel?
A: The internal diagnostics detect a drop below 3.6 mA. The module immediately registers a channel fault state, drives the corresponding register status to "bad," and triggers an alarm on the host system console.
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