EU - TYPE EXAMINATION CERTIFICATE
Certificate Number: Baseefa19ATEX0022X – Issue 4
Issued: 15 March 2021
Product Information
Product: MTL SUM5 Universal Isolator
Manufacturer: Eaton Electric Limited
Address: Great Marlings, Butterfield, Luton, Bedfordshire, LU2 8DL
This certificate extends EU Type Examination Certificate No. Baseefa19ATEX0022X to apply to product designed and constructed in accordance with the specification set out in the Schedule of the said certificate, including any variations specified in the attached schedule.
Compliance and Safety
SGS Fimko Oy, Notified Body number 0598, certifies that the product complies with the Essential Health and Safety Requirements relating to the design and construction of products intended for use in potentially explosive atmospheres, as per Directive 2014/34/EU.
Compliance has been assured by adherence to:
- EN IEC 60079-0: 2018
- EN 60079-11: 2012
Specific Conditions of Use may apply, indicated by an "X" after the certificate number.
This certificate covers the design and construction of the specified product. Further requirements of the Directive apply to the manufacturing process and supply of this product.
Product Marking
The product marking shall include:
- II (1)GD [Ex ia Ga] IIC (-40°C ≤ Ta ≤ +70°C)
- II (1)GD [Ex ia Da] IIIC (-40°C ≤ Ta ≤ +70°C)
- I (M1) [Ex ia Ma] I (-40°C ≤ Ta ≤ +70°C)
Description of Product
The MTL SUM5 Universal Isolator is designed to provide a digital or analogue interface for equipment in hazardous areas, repeating signals in non-hazardous areas while restricting energy transfer. It comprises an Interface Module (MTL4-ADIO Universal Analogue / Digital Interface Module) and a Base Module (standard MTL4-BSIS IS Module Base or relay output MTL4-BSISR IS Module Relay Base).
The Interface Module uses an isolating transformer, opto-isolator circuits, and zener diode/resistor arrangements for galvanic isolation and voltage/current limitation. The Base Module provides external hazardous area connections and non-hazardous area connections via a polarized plug. It also includes additional zener diode and current limiting resistor arrangements. Variants include the standard Base Module and the Relay Base, which offers galvanically isolated SPDT relay contacts rated for up to 30V and 1A.
The isolator can be fitted with an optional Plug-In Surge Module (MTL4-SD or MTL4-SDR) for surge protection on hazardous area connections.
The configuration (analogue/digital input/output) depends on the Interface module, IS Power Jumper Link position on the Base Module, and software configuration.
Input & Output Parameters
MTL4-BSIS IS Module Base & MTL4-ADIO Interface Module
Non-Hazardous Area Connector CON1, Pins 1 to 6 & 9 to 12
Um = 30V
These connections are designed for d.c. supply voltages up to 30V from safety extra-low-voltage (SELV) or protective extra-low-voltage (PELV) circuits, complying with standards like IEC 60950 or IEC 61010-1.
MTL4-BSISR IS Module Relay Base & MTL4-ADIO Interface Module
Non-Hazardous Area Connector CON1, Pins 1 to 6 & 9 to 12
Um = 30V
Similar to the above, these connections operate from SELV or PELV circuits.
Relay Contact Connections - Hazardous Area Terminals 1 (NO), 2 (NC) & 3 (COM)
- Ui = 30V
- Ci = 0
- Li = 0
- Uo = 0
- Io = 0
The relay contacts are rated to a maximum of 30V and 1A.
Load Parameters
The capacitance and inductance (or L/R ratio) of the hazardous area load connected must not exceed the values specified in the following tables:
| GROUP | CAPACITANCE (μF) | INDUCTANCE (mH) | OR L/R RATIO (μH/ohm) |
|---|---|---|---|
| Hazardous Area Terminals 4 w.r.t. 3 (IS Power Jumper Link not Fitted) | |||
| IIC | 0.095 | 2.00 | 58 |
| IIB* | 0.73 | 17.1 | 235 |
| IIA | 2.45 | 34.3 | 471 |
| I | 4.3 | 56.3 | 774 |
| Hazardous Area Terminals 4 w.r.t. 3 (IS Power Jumper Link Fitted) | |||
| IIC | 0.095 | 2.00 | 39 |
| IIB* | 0.73 | 8.40 | 157 |
| IIA | 2.45 | 16.4 | 315 |
| I | 4.3 | 56.3 | 517 |
| Hazardous Area Terminals 4 w.r.t. 2 (IS Power Jumper Link not Fitted) | |||
| IIC | 0.094 | 4.29 | 58 |
| IIB* | 0.72 | 17.1 | 235 |
| IIA | 2.44 | 34.3 | 471 |
| I | 4.29 | 56.3 | 774 |
| Hazardous Area Terminals 4 w.r.t. 2 (IS Power Jumper Link Fitted) | |||
| IIC | 0.094 | 2.00 | 39 |
| IIB* | 0.72 | 8.40 | 157 |
| IIA | 2.44 | 16.4 | 315 |
| I | 4.29 | 56.3 | 517 |
| Hazardous Area Terminals 2 w.r.t. 3 | |||
| IIC | 3.0 | 1,000 | 109,401 |
| IIB* | 20.0 | 1,000 | 437,606 |
| IIA | 100 | 1,000 | 875,213 |
| I | 180 | 1,000 | 1,435,897 |
* Group IIB parameters also applicable for associated apparatus [Ex ia Da] IIIC
Notes:
- Load parameters apply based on one of two conditions: total external inductance (L₁) being < 1% of L₀, or total external capacitance (C₁) being < 1% of C₀.
- Parameters are reduced by 50% if both conditions are met: total external L₁ ≥ 1% of L₀ and total external C₁ ≥ 1% of C₀.
- Reduced external capacitance (including cable) must not exceed 1µF for Groups IIB, IIA & I, and 600nF for Group IIC.
- The values of L₀ and C₀ must not be exceeded by the sum of all Lᵢ plus cable inductances and Cᵢ plus cable capacitances.
Specific Conditions of Use
- Connections for non-hazardous areas must be supplied from SELV or PELV circuits compliant with IEC 60950 or IEC 61010-1.
- When fitted with optional surge modules, the equipment is not capable of withstanding the 500V dielectric strength test required by clause 6.3.13 of EN 60079-11: 2012.
- MTL4-BSISR IS Module Relay Base only: Circuits connected are limited to overvoltage category I/II/III as defined in IEC 60664-1.
Essential Health and Safety Requirements
In addition to standards listed in item 9, the following EHSRs are considered relevant:
- Clause 1.2.7: Protection against other hazards (LVD type requirements, etc.)
- Clause 1.2.8: Overloading of equipment (protection relays, etc.)
- Clause 1.4.1: External effects
- Clause 1.4.2: Aggressive substances, etc.
Drawings and Documents
Details of new and current drawings associated with this certificate are listed, including general assembly, circuit diagrams, parts lists, and certification markings for the MTL SUM5 Universal Isolator and associated surge modules.
Certificate History
The certificate has undergone several issues, with each issue detailing minor changes to components, circuits, or documentation, and the addition of new product variants like the MTL4-BSISR IS Module Relay Base and MTL4-SDR Relay Surge Module.
