WhatsApp: +86 16626708626
Email: 
Phone: +86 16626708626Description
2. Product Core Brief
- Model: ABB 1MRK000508-BD
- Brand: ABB (formerly ASEA Brown Boveri)
- Series: 1MRK BIM Binary Input Modules
- Core Function: Binary input acquisition for PLC/DCS/IED systems
- Product Type: Binary Input Module
- Key Specs: 16 DC input channels; RL110; 110–125 VDC; 50 mA per
- Condition: New Original / New Surplus
3. Key Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 1MRK000508-BD |
| Manufacturer | ABB (ASEA Brown Boveri heritage) |
| Module Type | Binary Input Module |
| Channel Count | 16 inputs |
| Input Type | DC binary (RL110 load) |
| Rated Input Voltage | 110–125 VDC |
| Input Current | 50 mA per channel |
| Environmental Rating | IP20 (typical industrial module) |
| Operating Temp. | –25 °C to +60 °C (industry standard) |
| Weight | ~0.41 kg |
| Mounting/Form Factor | PLC/automation rack slide-in module |
| Legacy OEM Status | Discontinued (secondary market) |
| Typical Use | Binary signal capture for protection/control racks |
Functionally, this module accepts high-level DC control signals and presents them to a PLC/DCS or IED rack for logic decision making and control tasks.
4. Product Introduction
The ABB 1MRK000508-BD is a 16-point binary input module designed for industrial control environments requiring discrete signal acquisition from field devices. Each channel accepts 110–125 VDC input signals and is rated at 50 mA per channel, making it suitable for higher-level DC logic interfaces typical in legacy protection racks, PLC, or bay control panels.
Originally manufactured by ABB/ASEA Brown Boveri, this module is part of the BIM (Binary Input Module) family. The “-BD” suffix denotes the 110–125 VDC input range variant. It is widely used in automation and protection systems where reliable discrete signal capture feeds logic controllers and interlocks. Verified OEM or surplus stock is essential for legacy system support and reduced downtime.
- 1MRK000508-BD
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance | Quick Check | Recommendation |
|---|---|---|---|---|
| No status change on expected input channel | No DC supply or miswiring | ✅ High | Measure 110–125 VDC at input terminals | Verify field wiring & supply source |
| All channels reading OFF | Faulty module logic or blown internal fuse | ⚠️ Medium | Check backplane rack power & slot alignment | Test in known good slot; replace if needed |
| Intermittent ON/OFF flicker | Noise/ground loop on inputs | ⚠️ Medium | Check shield continuity & ground reference | Improve shielding & ground ties |
| Channel stuck ON | Shorted input or stuck field contact | ⚠️ Medium | Use multimeter to check input line continuity | Eliminate stuck device at field input |
| Module not recognized by controller | Backplane/rack bus fault | ❌ Low | Inspect rack bus connectors & backplane | Repair rack issues first |
Tip: Discrete modules rarely “die” electrically; most binary input issues originate from wiring faults, loose connectors, or DC supply errors.
6. Frequently Asked Questions (FAQ)
Q1: What does the “-BD” suffix mean?
A: The “-BD” on 1MRK000508-BD indicates the 110–125 VDC input range for this binary input module. This differs from other variants (e.g., -CD for 220–250 VDC).
Q2: Where is this module used?
A: It’s typically used in industrial automation racks (PLCs, IEDs, or protection panels) to capture discrete high-level DC signals like alarms, statuses, or interlocks and forward them into logic/relay processing.
Q3: Is this part still made by ABB?
A: No — this variant is discontinued by the manufacturer. Current supply is from secondary markets (new surplus/refurbished).
Q4: What compatibility issues should I watch for?
A: Ensure your controller or rack backplane supports 110–125 VDC discrete inputs and that wiring polarity and loads match spec before installation. Confirm input load and logic behavior in your controller program.
Q5: Why is this cheaper than factory list price?
A: Since this part is discontinued, pricing is based on surplus stock and secondary inventory, not current OEM production.
Q6: How many inputs does it handle?
A: This module supports up to 16 binary input channels at the specified DC voltage range.
