FHF mTAR Explosion Proof Telephone Connecting Relay Owner’s Manual
- June 3, 2024
- FHF
Table of Contents
Explosion-proof telephone connecting relay mTAR
mTAR
Order data
| Designation | Type | Article no. |
|---|---|---|
| Telephone connecting relay | mTAR | 118 831 21 |
Description
The telephone connecting relay type mTAR is used as a fixed device in areas
that may be at risk due to explosive gas or dust atmospheres and which require
devices of device groups II and III of the categories 2G and 2D.
The designated position of normal use is not mandatory.
The telephone connecting relay type mTAR is implemented in the following
ignition protection classes:
Ex e ib mb IIC T4 Gb
Ex tb IIIC T135°C Db IP66
Temperature range -40°C Ta +70°C
The telephone connecting relay type mTAR is intended for connection to
analogue telephone networks. It can be simply installed parallel to a
telephone.
The telephone connecting relay serves for call signalling through providing
potential-free switching contacts for the connection of signalling devices.
This means for example that up to two external devices (e.g. a horn and a
flash light) can be switched on via call signal. The call break bypass can be
individually adjusted for one of the connected devices.
The installation regulations in accordance with IEC/EN 60079-14 as well as the
respective national installation regulations must always be taken into
consideration.
Device structure
The telephone connecting relay type mTAR has an unpainted housing made of
electrostatically conductive compressed material.
The housing consists of a boxshaped lower part for receiving the electronics
module. The electronics module is firmly cast into the lower part of the
housing and cannot be exchanged.
The cover is pressed onto the lower part of the housing using four screws, with a circumferential seal positioned in between. This forms the non- intrinsically safe connection compartment.
Intrinsically safe DIP switches
An intrinsically safe 4-pole sliding switch extends out from the casting
within the device (see device overview) for pre-setting the desired mode of
operation.
Dimensions
Assembly and installation
Loosen the cover screws (2) and remove the cover (1) (see device overview). Insert the lower part into the opening (3) using four 4 mm screws with a head diameter of 6 mm to 7 mm and fasten to the wall or ceiling or onto a plate. If the head diameter of the screws is too small, suitable washers of 6 mm to 7 mm in diameter are to be used in addition. Lead the connection lines through the screwed cable glands (KLE) (4) and connect them to terminals in accordance with connection diagram. The tightening torque of the cover screws is 1.2 Nm.
Notes on cable glands
The cable glands may not be exchanged! The cable connection is only suitable
for permanently installed lines! In case of factory fitted cable glands the
attached operating instructions have to be considered.
NOTE: Excessive tightening compromises the protection class.
The following is to be considered when assembling the sealing plug:
- Only the sealing plug belonging to the cable gland (5) may be used.
- The head side of the sealing plug must be on the outside (5).
- The sealing plug (5) is to be pushed into the cable gland as far as it will go.
Maintenance
The telephone connecting relay type mTAR contains no parts that need maintaining.
Maintenance and servicing
The equipment contains no parts that need maintaining. The specifications of
EN 60079-17 regarding the regular inspection of explosion protection are to be
adhered to.
Start-up
After it has been connected to the telephone network, the device is ready for
electrical operation.
Requirements
none
CE symbol
We hereby declare this product is in compliance with the Essential Health and
Safety Requirements of ATEX Directive 2014/34/EU, EMC Directive 2014/30/EU,
Low Voltage Directive 2014/35/EU and RoHS Directive 2011/65/EU. The
appropriate standards, technical regulations und specifications you can take
from the attached conformity declaration and the conformity declarations on
our Website.
Electrical parameters
-
Telephone network (not intrinsically safe) Terminals No. 7 and 8 in accordance with 9 and 10
Un = AC 90 V / f = 25 Hz
Um_AC = AC 100 V / f = 20 … 68 Hz
Um_DC = DC 66 V
Um = 120 Veff
AC and DC voltage parts can be superimposed. Permissible conductor cross- sections are 0.2 to 4.0 mm² rigid or 0.2 to 2.5 mm² flexible.
Only 2 or 4-core lines may be used. -
Potential-free relay contacts (not intrinsically safe) Terminals No. 1/3 or No. 4/6
Umax = AC 250 V
Imax = 5 A
Pmax = 100 VA
In this case only lines with a core cross-section of 1.5 mm² to 4 mm² may be used.
Or
Umax = DC 230 V
Imax = 0.5 A
Pmax = 100 W
In this case only lines with a core cross-section of 0.75 mm² to 4 mm² may be used.
Or
Umax = DC 50 V
Imax = 1 A
In this case only lines with a core crosssection of 0.75 mm² to 4 mm² may be used.
Or
Umax = DC 30 V
Imax = 5 A
Pmax = 100 W
In this case only lines with a core crosssection of 1.5 mm² to 4 mm² may be used.
The terminals no. 2 and 5 according to the connection diagram may not be used. Only 2 or 4-core lines may be used. -
The telephone network is securely and galvanically isolated from the potential-free relay contacts.
-
The two potential-free relay contacts are securely and galvanically isolated from one another up to a voltage of 440 Veff.
The voltage may not exceed 250 Veff at an individual relay contact.
Connection diagram
Technical data
Housing
Material : Glass-fibre reinforced polyester Approx.
Height x width x depth : 75 mm x 190 mm x 75 mm
Weight : Approx. 1.1 kg Any
Environmental conditions
Protection class : IP 66 in accordance with EN60529
Operating temperature : -40°C Ta 70°C
Transport and storage temperature : -40°C to +70°C in accordance with IEC
60721
Further features
Power supply : Call AC voltage from the analogue telephone network. TNV-3
circuit. U = AC 30 V… 100 V
Call impedance : M 8 kΩ (@ 30 V… 100 V/20… 68 Hz)
Modes of operation :
Function of relay contact 1 (terminals 1 and 3) adjustable by means of sliding
switches:
Sliding switch 4 = OFF => contact follows the call signal
Sliding switch 4 = ON => contact closes for approx. 1.5 seconds
Function of relay contact 2 (terminals 4 and 6) adjustable by means of sliding
switches.
The contact always follows the call signal. After the call signal, i.e. in the
call break that follows, the contact remains closed for the duration according
to the following setting (call break bypass).
1 = ON => call break bypass approx. 1 second
2 = ON => call break bypass approx. 2 seconds
3 = ON => call break bypass approx. 3 seconds
1 to 3 = OFF => call break bypass approx. 9 seconds
Combinations are possible:
1
ON
OFF
OFF
OFF
ON
OFF| 12
OFF
ON
OFF
ON
ON
OFF| 3
OFF
OFF
ON
ON
ON
OFF| Call break bypass approx.
1 s
2 s
3 s
5 s
6 s
9 s
---|---|---|---
Note: The smooth functioning in the case of a “double call”, i.e. two short call signals one behind the other, cannot be guaranteed given the abundance of double call signals worldwide. It is the operator’s responsibility to test the function on his system in these cases.
Marking
The type plate of the telephone connecting relay type mTAR is marked as
follows:
FHF Funke Huster Fernsig GmbH
45478 Mülheim a. d. Ruhr
Type mTAR
BVS 13 ATEX E 066
CE 0158
II 2G Ex e ib mb
IIC T4 Gb II 2D Ex tb IIIC T135°C Db
-40°C Ta +70°C
Manufacturing No. xxxx
Article no. xxxx
Inspection: Month / year / inspector
Um = 120 V IP66 IK08
WARNING DO NOT OPEN WHEN LIVE
WARNING WAIT 5 MINUTES AFTER SWITCHING OFF BEFORE OPENING
Warnings and safety instructions
This device is an explosion-proof telephone connecting relay specially for operation in a hazardous industrial environment. The following warnings and safety instructions are to be considered:
- The device serves for call signalling at analogue telephone connections through providing potentialfree switching contacts for connecting signalling devices. It is not intended for use in safety-related applications.
- The device is constructed in protection class II and may only be connected and operated at the prescribed voltage. A correct connection is to be ensured. The connection line is to be installed in such a way that there is no risk of stumbling.
- The device may only be operated under the ambient conditions indicated (see chapter “description”). Adverse ambient conditions, such as too high or too low an ambient temperature, are not permissible since these encourage the failure of electronic components.
- It is to be ensured that the device, the connection cable etc. are not damaged. If damaged, operating the device is not permissible.
- When operating the device, the legal and commercial regulations, the accident prevention regulations and the electrical codes are to be taken into consideration.
- In the case of repairs, only original spare parts are permissible, which must be exchanged in a technically correct manner. Other replacement parts may lead to damage and to the warranty expiring.
- The device must be de-energised for it to be opened.
- After switching off, wait 5 minutes before opening.
- When open, no dust may get into the device.
- The cover seal necessary for the tightness of the housing as well as the collar at the lower part of the housing may not be damaged during assembly and disassembly.
- When reconditioning the equipment for use in dust, the reconditioned parts should undergo another routine check test.
- Changes to the product which serve for technical advancement may be made without being announced beforehand.
- If using a 4 core installation cable (NYM-J 4x 1,5 mm2) and the 5 A load each of both relays at an environmental temperature of +70 °C a temperature of +74 °C will be achieved at the cable inlet. It has to be made sure, that a suitable installation cable will be chosen.
- The manufacturer assumes no liability for the connection being correct! If the aforementioned points are not adhered to, the explosion protection of the device is no longer ensured and the device then puts the life of the operator in danger and can cause an explosive atmosphere to be ignited.
- The connection and the installation of the device have to be carried out by an instructed specialist in accordance with the prescribed installation regulations and taking the indicated ignition protection class into consideration.
Subject to alterations or errors
FHF Funke + Huster Fernsig GmbH
Gewerbeallee 15-19 · D-45478 Mülheim an der Ruhr · Web:
www.fhf.de
Phone +49 – 208 – 8268-0 · Fax +49 – 208 – 8268-286 · Mail:
info@fhf.de
Orders: fhf-orders@eaton.com · Requests: fhf-
sales@eaton.com
Support: fhf-support@eaton.com