Yokogawa ADM55R-S2 Relay Output Module | Replacement, Equivalent & Selection Guide
The Yokogawa ADM55R-S2 is a relay output module designed for use in Yokogawa’s CENTUM VP and CS 3000 Distributed Control Systems (DCS). It provides reliable discrete output control for industrial automation processes requiring relay-driven field devices. As an authorized sourcing partner, Konmask.com supplies both original and verified equivalent modules to support your control system maintenance and upgrade needs.
Technical Specifications
| Model | ADM55R-S2 |
| Manufacturer | Yokogawa Electric Corporation |
| Module Type | Relay Output Module |
| Compatible System | CENTUM VP, CENTUM CS 3000 |
| Output Type | Relay (dry contact) |
| Number of Channels | 16 channels (typical for ADM55R series) |
| Contact Rating | 250 VAC / 30 VDC, 2A (resistive load) |
| Isolation | Channel-to-channel and channel-to-bus isolation |
| Power Supply | Supplied via DCS backplane |
| Weight | 1,250 g |
| Suffix -S2 | Standard specification variant |
Compatible Replacement & Equivalent Models
When the original ADM55R-S2 is unavailable or end-of-life, the following models may serve as functional replacements depending on your system configuration. Always verify compatibility with your system integrator before substitution.
| Model | Manufacturer | Notes |
|---|---|---|
| ADM55R-S1 | Yokogawa | Earlier suffix variant; verify firmware compatibility |
| ADM55R-S3 | Yokogawa | Newer suffix; may offer enhanced diagnostics |
| ADM55D-S2 | Yokogawa | Digital output variant; transistor output instead of relay |
| AAM55R | Yokogawa | Analog/relay mixed module; check channel mapping |
| Third-party relay output modules | Various | Must match backplane pinout and DCS protocol; consult Konmask |
Why Choose the Original ADM55R-S2
- Native DCS Integration: Plug-and-play compatibility with CENTUM VP and CS 3000 without additional configuration.
- Proven Reliability: Yokogawa’s relay modules are field-proven in petrochemical, power, and process industries worldwide.
- Full Diagnostics Support: Original modules support Yokogawa’s built-in self-diagnostics and HART pass-through where applicable.
- Warranty & Traceability: Genuine parts come with manufacturer traceability and are eligible for Yokogawa service contracts.
- Long Service Life: Designed for 24/7 continuous operation in harsh industrial environments.
Typical Applications
- On/off valve control in oil & gas and petrochemical plants
- Motor starter and pump control in water treatment facilities
- Alarm and interlock output in power generation systems
- Discrete output control in pharmaceutical manufacturing
- Relay-driven actuator control in pulp & paper processes
System Compatibility
- Yokogawa CENTUM VP (all revisions)
- Yokogawa CENTUM CS 3000 (R3.x and above)
- Compatible with standard Yokogawa I/O nest and field control station (FCS) configurations
- Supports hot-swap replacement in redundant configurations (verify with system documentation)
Selection Guide
Use the following criteria to confirm the ADM55R-S2 is the correct module for your application:
- Output type required: Relay (dry contact) — if transistor output is needed, consider ADM55D series.
- Channel count: Confirm 16-channel capacity meets your I/O point requirements.
- Voltage/current rating: Verify field device load does not exceed 250 VAC / 2A per channel.
- Suffix version: Match the -S2 suffix to your existing system BOM to ensure firmware and hardware revision alignment.
- Slot compatibility: Confirm the target I/O nest slot type accepts the ADM55R series.
- Redundancy requirement: If redundant output is required, verify pairing with appropriate redundancy module.
Quality Assurance & Sourcing
- All modules sourced through Konmask.com undergo visual inspection and functional verification prior to shipment.
- Original Yokogawa modules are supplied with full manufacturer documentation and traceability records.
- Refurbished and surplus units are clearly labeled and priced accordingly — no misrepresentation.
- We maintain stock of both current-production and legacy Yokogawa DCS modules to support long-term plant maintenance.
- Export compliance and customs documentation provided for international orders.
How to Order
- Step 1: Confirm your system model (CENTUM VP or CS 3000) and I/O nest slot number.
- Step 2: Verify the required suffix version (-S1, -S2, -S3) from your existing module label or system BOM.
- Step 3: Contact Konmask.com via the product page, email, or phone with your quantity and delivery requirements.
- Step 4: Receive a formal quotation with lead time, pricing, and shipping options within 24 hours.
- Step 5: Confirm order and receive tracking information upon dispatch.
📧 support@konmask.com | 📞 +0086 19859288691
Replacement & Compatibility FAQ
Q: Can I replace ADM55R-S2 with ADM55R-S1 directly?
A: In most cases yes, but suffix differences may indicate hardware or firmware revisions. Always verify with your Yokogawa system documentation or contact Konmask for guidance.
Q: Is the ADM55R-S2 still in production?
A: Yokogawa periodically updates module revisions. Contact Konmask.com to confirm current production status and available stock.
Q: Can this module be used in a non-Yokogawa DCS?
A: No. The ADM55R-S2 is designed exclusively for Yokogawa CENTUM backplane architecture and is not compatible with third-party DCS platforms.
Q: Do you supply modules with test reports?
A: Yes. Functional test reports are available upon request for refurbished units. New original modules include Yokogawa factory documentation.
Q: What is the typical lead time?
A: In-stock items ship within 1–3 business days. Out-of-stock items typically have a 2–6 week lead time depending on sourcing channel.
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Contact: support@konmask.com | +0086 19859288691
