MTL 7700 Intrinsically Safe Barrier

Fits DIN-rail intrinsically safe loop protection where you need a shunt-diode barrier module (1-, 2-, or 3-channel by model) with removable terminals and optional bussed power.

Key advantages

Shunt-diode IS barriers — DIN-rail MTL7700 range for intrinsically safe loops.
1 / 2 / 3 channels — Module count matched to each IS loop and signal type.
Removable terminals — Angled-entry terminals for serviceable wiring.
Optional bussed power — MTL7798 feed module when a power bus is required.

Typical applications

DIN-rail IS loop protection on process panels.
Multi-channel analogue or discrete IS loops needing shunt-diode barriers.
Cabinets standardized on MTL7700 with T-section DIN-rail IS earth.

Selection guide

Function — DIN-rail shunt-diode intrinsically safe barrier range (MTL7700).
Channels — 1-, 2-, or 3-channel modules by model. Match channel count and signal type to each IS loop.
Mounting — T-section DIN rail with IS earth connection.
Terminals — Removable angled-entry terminals.
Power bus — Optional bussed power via MTL7798 feed module.
Approvals — ATEX; IECEx; FM; CSA; Baseefa (by module). Confirm the exact module certificate before naming the protection method.

Common mistakes

Ordering channel count without locking the exact MTL7700 module code for the signal type (AI/AO/DI/DO) — this SKU is a range page.
Mounting without a proper IS earth on the T-section DIN rail — earth connection is part of the barrier function.
Assuming bussed power is included — optional via MTL7798; state if you need it.
Claiming ATEX/IECEx/FM/CSA/Baseefa on a drawing without the specific module certificate and entity parameters.
Treating shunt-diode barriers as galvanic isolators — grounding and return path rules differ; confirm topology with your IS designer.

When to RFQ / what to tell us

Signal type per channel (e.g. analogue in/out, discrete) and number of IS loops.
Preferred channel count (1 / 2 / 3) and any known MTL7700 module codes.
DIN-rail / IS earth arrangement and whether MTL7798 bussed power is required.
Required approvals (ATEX, IECEx, FM, CSA, Baseefa) and entity parameters to match field devices.
Quantity and ship-to country.

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Specs

Spec	Value
SKU	42867
Brand	MTL Instruments
Model	MTL7700
Product type	barrier
Function	DIN-rail shunt-diode intrinsically safe barrier range (MTL7700)
Channels	1-, 2- or 3-channel modules by model
Mounting	T-section DIN rail with IS earth connection
Terminals	Removable angled-entry terminals
Power bus	Optional bussed power via MTL7798 feed module
Approvals	ATEX; IECEx; FM; CSA; Baseefa (by module)

Documents

FAQ

Q: Is this a specific barrier module or the whole range? A: This SKU covers the MTL7700 shunt-diode IS barrier range. Channel count (1/2/3) and signal type are selected by module — send loop list and preferred codes.

Q: Do I need the MTL7798? A: Only if you want optional bussed power feed. Otherwise modules mount on T-section DIN rail with IS earth as specified.

Q: Which approvals apply? A: ATEX, IECEx, FM, CSA, and Baseefa by module. Only the ordered module’s certificate and entity parameters apply.

Q: What should I send for a quote? A: Loop list (signal types), channel needs, power-bus yes/no, required marks, quantity. Compatible with systems using MTL 7700 if you need a drop-in check — we do not claim authorized-dealer status.