ADM51C-2 Yokogawa Centum VP Datasheet & Technical Manual

Yokogawa ADM51C-2 Centum VP Digital Input Module

Yokogawa ADM51C-2 Centum VP Digital Input Module

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Yokogawa ADM51C-2 Field I/O Digital Input Module Configured for pulse count and dry contact signal processing in Yokogawa Centum CS...

SKU: ADM51C

Manufacturer: Yokogawa
Product No.: ADM51C
Product Type: Digital Input Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 100g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa ADM51C-2 Field I/O Digital Input Module

Configured for pulse count and dry contact signal processing in Yokogawa Centum CS and Centum VP platforms, the Yokogawa ADM51C-2, also cataloged as the ADM51C-2 Digital Input Module, provides direct physical/electrical execution. It operates within the Field I/O subsystem to acquire field device statuses from switches, relays, and sensors across high-density control topologies.

Hardware Specifications

Parameter	Specification
Model	ADM51C-2
Brand	Yokogawa
Origin	Japan
Weight	0.1 kg (0.22 lbs)
Dimensions	130 x 107.5 x 32.8 mm
Operating Temp	0 to 50 deg C
Power Consumption	0.3 A at 24 VDC nominal
Input Channels	32 channels
Input Signal Types	Dry contact, voltage pulse, current pulse (2-wire/3-wire)
Input Frequency Range	0 to 10 kHz
Data Update Period	10 ms
Minimum Pulse Width	40 us
Input Signal Level	3 to 24 VDC voltage pulse
Selectable Shunt Resistor	200 ohm, 510 ohm, 1000 ohm
Auxiliary Output	Open collector transistor contact (30 VDC, 30 mA)
Isolation Voltage	1500 V AC channel-to-system
Insulation Resistance	Minimum 100 M ohm at 500 V DC
Withstand Voltage	500 V AC
Relative Humidity	10 to 90% RH (non-condensing)

Channel Isolation and Processing Features

The module incorporates robust channel-to-system galvanic isolation rated for 1500 V AC, preventing ground loops and suppressing high-voltage common-mode transients. For pulse processing tasks, the onboard hardware supports high-speed signal evaluation up to 10 kHz with minimum pulse detection down to 40 us. Integrated shunt resistor networks allow configurable termination for current-to-voltage signal conversion, maintaining signal integrity without external signal conditioning equipment.

Frequently Asked Questions

Q: What are the field wiring limits for detecting dry contact state transitions?

A: The module identifies an ON state when field circuit resistance drops to 150 ohm or less, and recognizes an OFF state when resistance exceeds 200 k ohm across the input terminal interface.

Q: How does the auxiliary open-collector output behave during operation?

A: The auxiliary output functions as a secondary status driver rated for maximum limits of 30 VDC and 30 mA, allowing real-time hardware status reflection to external alarm circuits or local panel indicators.

Field Installation Guidelines

Ensure complete power removal from the target node chassis prior to inserting the module into the backplane connector. Verify proper seating of the front connector assembly to ensure reliable contact engagement across all 32 channels. Connect signal cable shields to the designated system functional ground point at a single termination end to avoid parallel ground paths. Maintain separation between high-voltage power lines and signal wiring runs within the cabinet ducting to minimize electromagnetic interference on pulse-counting circuits.

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