MTL 8751-CA-NS Zener Barrier Carrier Module | Replacement, Equivalent & Selection Guide
The MTL 8751-CA-NS is a non-isolated Zener barrier carrier module designed for use within the MTL8000 Series intrinsic safety system. It provides a robust, DIN-rail-mountable platform for housing MTL Zener barrier modules in hazardous-area installations across oil & gas, chemical processing, and industrial automation environments. Procurement engineers rely on this carrier for its proven compatibility, passive architecture, and long-term field reliability.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | 8751-CA-NS |
| Manufacturer | MTL Instruments (Eaton MTL) |
| Series | MTL8000 / MTL8700 Carrier System |
| Function | Non-isolated Zener barrier carrier module |
| Mounting | DIN rail (TS-35) |
| Module Slots | Single-module carrier |
| Isolation Type | Non-isolated (NS) |
| Certification | ATEX / IECEx intrinsic safety compatible |
| Housing Material | Flame-retardant thermoplastic |
| Operating Temperature | -20°C to +60°C |
| Connection Type | Screw terminal (field & system side) |
| Weight | Approx. 60 g |
| Country of Origin | United Kingdom |
Compatible Replacement & Equivalent Models
When the MTL 8751-CA-NS is unavailable or end-of-life, the following models are commonly evaluated as functional equivalents or drop-in replacements. Always verify electrical and mechanical compatibility before substitution:
| Model | Brand | Type | Notes |
|---|---|---|---|
| 8751-CA-IS | MTL | Isolated carrier variant | Same form factor; isolated version — verify loop requirements |
| MTL8751 | MTL | Standard barrier module | Plug-in module for this carrier; not a carrier replacement |
| Z728 | Pepperl+Fuchs | Zener barrier | Functional equivalent barrier; requires compatible P+F carrier |
| MTL7700 Series | MTL | Older generation carrier | Legacy platform; not directly interchangeable |
| KFD2-STC4-Ex1 | Pepperl+Fuchs | Isolated barrier (alternative) | Isolated galvanic; different architecture — consult engineer |
⚠ Konmask engineers are available to verify cross-reference compatibility before purchase. Contact us at support@konmask.com.
Why Choose the Original MTL 8751-CA-NS
- Proven field reliability — Deployed in thousands of hazardous-area installations globally since the MTL8000 platform launch
- Passive architecture — No active components in the carrier; inherently lower failure risk and simplified maintenance
- System integrity — Designed exclusively for MTL8000-series barrier modules; ensures certified IS loop compliance
- Regulatory traceability — Original part maintains full ATEX/IECEx documentation chain for audits and SIL assessments
- Long service life — Thermoplastic housing rated for harsh industrial environments; minimal degradation over time
Typical Applications
- Oil & gas upstream/downstream field instrumentation (Zone 1 / Zone 2)
- Chemical and petrochemical plant DCS/PLC I/O marshalling panels
- Pharmaceutical manufacturing — intrinsically safe sensor loops
- Power generation — turbine and boiler instrumentation
- Water treatment — hazardous-area transmitter signal conditioning
- Offshore platform control room barrier assemblies
System Compatibility
The 8751-CA-NS carrier is compatible with the following MTL barrier modules (plug-in):
- MTL8706+, MTL8707+, MTL8708+ — analog input barriers
- MTL8712, MTL8714 — discrete input barriers
- MTL8723+, MTL8724+ — analog output barriers
- MTL8740, MTL8741 — solenoid driver barriers
- MTL8750 series — HART-compatible barriers
Compatible DIN rail systems: TS-35 (EN 60715). Integrates with MTL8500 and MTL8700 series bus systems.
Selection Guide
Use the following criteria to confirm the 8751-CA-NS is the correct carrier for your application:
| Requirement | 8751-CA-NS | 8751-CA-IS (Isolated) |
|---|---|---|
| Isolation required | ❌ No | ✅ Yes |
| Common earth/ground reference | ✅ Yes | ❌ Not required |
| ATEX Zone 1/2 compliance | ✅ Yes | ✅ Yes |
| MTL8000 module compatibility | ✅ Yes | ✅ Yes |
| Cost sensitivity | ✅ Lower cost | Higher cost |
Rule of thumb: Select NS (non-isolated) when all field instruments share a common earth. Select IS (isolated) when ground loops or floating references are present.
Quality Assurance & Sourcing
- Authentic parts only — Konmask sources MTL 8751-CA-NS exclusively from authorized distributors and verified OEM channels
- Inspection protocol — Each unit undergoes visual, dimensional, and marking verification against MTL factory standards
- Documentation package — Certificate of conformity, test report, and traceability records available on request
- Anti-counterfeit measures — Holographic labels and batch traceability codes verified before dispatch
- Warranty — 12-month warranty against manufacturing defects; return & replacement policy available
How to Order
- Confirm part number: MTL 8751-CA-NS
- Specify quantity and required delivery timeline
- Request a formal quotation via support@konmask.com or WhatsApp +0086 19859288691
- Receive pro-forma invoice with lead time confirmation
- Payment via T/T, PayPal, or trade finance — arrange shipment via DHL / FedEx / sea freight
- Receive shipment with full documentation package
Replacement & Compatibility FAQ
Q: Can I use the 8751-CA-NS with MTL7700 series barriers?
A: No. The MTL8000 and MTL7700 series use different mechanical and electrical interfaces. They are not interchangeable.
Q: Is the 8751-CA-NS the same as the 8751-CA-IS?
A: No. The NS suffix denotes non-isolated; the IS suffix denotes isolated. They differ in earth reference architecture. Verify your loop design before substituting.
Q: Can Pepperl+Fuchs Zener barriers be used in this carrier?
A: No. The 8751-CA-NS is mechanically and electrically specific to MTL8000-series plug-in modules. P+F barriers require their own carrier systems.
Q: Is this part still in production?
A: MTL (Eaton) periodically updates its product portfolio. Konmask maintains stock of both current and legacy MTL parts. Contact us to confirm current availability.
Q: Do you provide ATEX certificates with the part?
A: Yes. Full ATEX/IECEx documentation is available upon request for all MTL parts supplied by Konmask.
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Contact: support@konmask.com | +0086 19859288691
