MTL5511-interface
MTL Galvanic isolating interface unit MTL5511
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MTL Galvanic isolating interface unit MTL5511
Home > MTL > MTL5500 > MTL5511 Need MTL MTL5511? Galvanic isolating interface unit for Intrinsically safe hazardous-area switch / NAMUR proximity dete…
Specifications
| Brand | MTL |
|---|---|
| Model Number | MTL5511 |
| Official Product Name | MTL5500 series switch / proximity detector isolator, 1 channel, with line fault detection |
| Applicable System | Intrinsically safe hazardous-area switch / NAMUR proximity detector circuits |
| Product Type | Galvanic isolating interface unit (safety barrier) |
| Equivalent Standard | MTL4511 (MTL4500 series equivalent) |
| Product Status | In Stock |
| Input type | NAMUR switch / proximity detector (BS EN 60947-5-6) |
| Sensor voltage | 7 to 9 Vdc from 1 kohm +/-10% |
| Supply voltage | 20 ... 35 Vdc |
| Current consumption | 25 mA at 24 V typical |
| Power dissipation | 0.6 W at 24 V |
| Response time | 10 ms maximum |
| Output | Single-pole changeover relay; 250 V ac / 2 A or 40 Vdc / 2 A resistive |
| Galvanic isolation | 250 V rms, tested at 2200 V rms minimum |
| LED indication | Green = power, Yellow = status, Red = LFD |
| Hazardous area rating | Zone 0, IIC, T6 (switch); Div. 1 Group A |
| Safety integrity | SIL2 and SIL3 according to IEC 61508 |
| Mounting | T-section 35 mm DIN rail / MTL5500 backplanes |
| Terminals | Up to 2.5 mm2 stranded or single-core |
| Dimensions | Approx. 109.8 x 118.8 x 15.8 mm |
| Weight | Approx. 150 g |
| Ambient temperature | -20 ... +60 degC operating |
| Number of channels | 1 |
Product Description
It lets a safe-area load be controlled by a switch or NAMUR proximity detector installed in a hazardous area, while isolating the hazardous side from the safe area. User-selectable line fault detection (LFD) reports open- or short-circuit field wiring via the module LED and de-energises the output relay on a fault. Phase reversal is set by a side switch, and the output is a single-pole changeover relay. The unit is commonly used on process plants to bring proximity and dry-contact inputs safely into a control system. The MTL5511 is a single-channel switch/proximity detector interface from the MTL5500 series of intrinsic-safety isolating interface units.
Basic Product Information
- NAMUR / BS EN 60947-5-6 input with 7-9 Vdc sensor supply from 1 kohm
- User-selectable line fault detection (LFD) with LED indication for open- and short-circuit field wiring
- Single-pole changeover relay output for flexible NO/NC wiring
- Galvanic isolation 250 V rms between safe-area circuits and power supply; SIL2/SIL3 capable
- Single-channel interface lets a safe-area load be controlled from a hazardous-area switch or proximity detector
Technical Specifications
Version & Model Difference
The MTL5511 is the MTL5500-series single-channel switch/proximity detector interface with changeover relay output. The MTL4511 is the corresponding MTL4500-series equivalent with reduced contact ratings on the safe-area side. Both share the same NAMUR input, LFD and isolation concept, but the safe-area relay contact rating differs, so verify which series matches your existing backplane before ordering.
Application Scenarios
- Hazardous-area proximity and dry-contact input to a DCS or PLC
- Process plant valve and position switch monitoring
- Tank farm and pipeline limit-switch interfacing
- Intrinsically safe alarm and status circuits
- MTL MTL4544 Signal Isolator
- MTL MTL4549Y Isolating Driver
Frequently Asked Questions
What does the MTL5511 do?
It is a single-channel isolating interface that lets a safe-area load be controlled by a switch or NAMUR proximity detector located in a hazardous area, with line fault detection.
What output does it provide?
A single-pole changeover relay output, rated 250 V ac / 2 A or 40 Vdc / 2 A for resistive loads.
Does it detect field wiring faults?
Yes. Line fault detection is user-selectable via side switches and reports open or short circuits through the red LFD LED, de-energising the output relay on a fault.
What supply voltage does it need?
A 20 ... 35 Vdc supply, drawing about 25 mA at 24 V and dissipating about 0.6 W.
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