Klaxon TCC-0001 Intrinsically Safe Sounder User Manual

Klaxon TCC-0001 Intrinsically Safe Sounder

Product Information

The Klaxon Intrinsically Safe Sounder is an audible signalling device designed for use in hazardous environments. It is certified to the following approvals and conformities:

• Ex ia IIC T6 Ga
• Ex ia IIIC T85C Da
• Ex ia I Ma

These certifications allow the sounder to be installed in locations with specific conditions, as outlined below:

only exist for a short time.
Zone 20| Explosive dust air mixture is continuously present.
Zone 21| Explosive dust air mixture likely to occur in normal operation.
Zone 22| Explosive dust air mixture not likely to occur, and if it does, it will only exist for a short time.

The sounder is suitable for use with the following gas groupings:

• IIA Propane Group
• IIB Ethylene Group
• IIC Hydrogen and Acetylene
• M1 Methane, Carbon Dust

Product Usage Instructions

Please follow the instructions below for proper usage of the Klaxon Intrinsically Safe Sounder:

1. Ensure that the sounder is connected to an approved system.
2. Identify the appropriate zone classification for your installation location.
3. Verify that the gas groupings and temperature classifications of the sounder align with the conditions of the installation location.
4. Mount the sounder securely in the desired location, following any additional installation guidelines provided in the user manual.
5. Connect the sounder to a power source according to the electrical specifications outlined in the user manual.
6. Test the functionality of the sounder to ensure proper operation.
7. Refer to the user manual for any troubleshooting or maintenance instructions.

If you have any further questions or need assistance, please contact Klaxon Signals at sales@klaxonsignals.com.

Introduction

The Klaxon Intrinsically Safe Sounder product (TCC-0001) is ATEX and IECEx certified. The Sounder is approved to be installed in Groups I (Mining) and Group II (above ground), Zones 0, 1 or 2 with gas groups IIA, IIB, IIC and Zones 20, 21 and 22 for dust groups IIIC and carries a temperature classification of T6. The Sounder comprises of a 2 stage alarm and has a total of 32 selectable alarm tones via a DIP switch which is set upon installation. When powered via a suitable Galvanic Isolator or Zener Barrier the Sounder will draw a constant 33mA. The Sounder has diode reverse polarity protection and is also End of Line resistor compatible.

Intrinsically Safe Labelling

The product will have an individual serial number printed onto the head base plate. An example of the Sounder label is shown below.

These products have been tested by notified body Element Materials Technology who are UKAS accredited to BS EN ISO/IEC 17025:2005 and ISO/IEC 17065:2012. It is also a Notified Body for the ATEX Directive, UKEX/UKCA, an IECEx Certification Body and an IECEx Testing Laboratory. The suffix X at the end of the certificate numbers indicate that there are special clauses added for safe use of these units.

Types of Approval and Standards Applied
The Klaxon IS Sounder product has been approved to the following standards:

• IEC 60079-0:2011 / EN 60079-0:2018
• IEC 60079-11:2011 / EN 60079-11:2012
• EN 54-3 (Approval with BRE Global)

Zones, Gas Groups and Temperature Classification

The Klaxon Intrinsically Safe Sounder is certified to the following: Ex ia IIC T6 Ga, Ex ia IIIC T85C Da, Ex ia I Ma. This means that the units can be installed in locations with the following conditions when connected to an approved system:

Zones

• Zone 0 Explosive gas air mixture continuously present.
• Zone 1 Explosive gas air mixture likely to occur in normal operation.
• Zone 2 Explosive gas air mixture not likely to occur, and if it does, it will only exist for a short time.
• Zone 20 Explosive dust air mixture is continuously present.
• Zone 21 Explosive dust air mixture likely to occur in normal operation.
• Zone 22 Explosive dust air mixture not likely to occur, and if it does, it will only exist for a short time.

Gas Groupings
IIA Propane Group, IIB Ethylene Group and IIC Hydrogen and Acetylene M1 Methane, Carbon Dust

Equipment Category
1GD & M1 Temperature Range: -40°C < Ta <55°C

Dust
IIIA Fibres and Flying, IIIB Flour and Grain, IIIC Coal Dust and Metal Dust. The maximum surface temperature of the product during operation will not exceed 85°C. A Declaration of Conformity and also the Sounder Range ATEX and IECEX Certificates are available on request or alternately visit www.klaxonsignals.com.

Installation

The TimeSaver base enables quick and easy installation of these units with no extra cabling to be made to the head of the unit. Connections are made to the base during the initial wiring phase which results in a faster and more reliable installation. The sounder head ‘twists and clicks’ into the base on commissioning, thus avoiding any wiring or connection problems associated with traditional installations.

If required, the mechanism for locking the sounder to the base can be activated by removing the thin section of plastic shown in Fig. 1 with side cutters or a similar tool. To open a locked head, remove the small rubber bung from the hole on the side of the sounder insert a tool into the hole, and depress the clip whilst twisting the head. An alternative locking method is shown in Fig. 1b. Drive the hexagonal locking screw forward by turning a 1.5mm hexagonal key clockwise until the head is locked. The O-ring and bung must be re-fitted to maintain weatherproofing.

General Requirement
The Sounder must be installed in accordance with the latest EN60079-0 specification or equivalent IEC specification, with consideration for any local installation requirements, and should only be carried out by appropriately competent and qualified personnel.

• The location of the Sounder should be chosen with due regard to the area over which the signalling device must be audible.
• These units are suitable for wall or ceiling mount only.
• Environmental exposure conditions during installation should be dry. Moist or wet conditions should be avoided.
• Avoid mounting the Sounder where it may be subjected to excessive vibration.

To mount the unit

• Remove the head from the base by rotating anticlockwise until it comes free.
• Remove the appropriate fixing hole and conduit knockouts from the back box.
• The back box provides IP66* protection. For this to be maintained, suitably rated (minimum IP66) M20 cable glands must also be used for cable entry/exit.
• Insert cable glands and attach to surface.
• Select required wiring option for required operation (see wiring sec-tion 6.0).
• Select tone by configuring the DIP switches in the head unit. The tone table can be found on of this booklet (Pre-set to tone 18).
• Relocate head onto mounted base unit & rotate clockwise until locked in place.

Wiring

Table above indicates markings inside the base of the unit for wiring con- nections.
Each unit must be powered via an approved Zener Barrier or Galvanic Isolator whose entity parameters do no exceed: Uo:28v, Io: 93mA, Po:660mW, Ci:0, Li:0
Operation of the Sounder Range can be taken from the table below:

Line| Terminal Marking| Beacon Active| Sounder Active| Both Active
---|---|---|---|---
Common Positive Supply IN (Uo)| (3) IN+| +| +| +
Sounder Negative Supply| (2) –|  | –| –
Beacon Negative Supply| (1) ♫/☼| –|  | –

Single Stage Alarm
Before final installation of the TCC-0001 Sounder head unit onto the in- stalled base, the alarm tone must be set. To control the Sounder use either a switch in the safe area on either the positive or negative lines into the Barrier, or by turning the power supply on and off.

Two Stage Alarm
When a two stage alarm is required it is possible to activate an alternate tone by connecting the “♫/☼” (Beacon ground) pin to 0v. For this application, a barrier with 2 Diode return paths is required as shown in the diagram below:

Switching between return paths for the 2 stage system will enable the 2nd tone. Second stage tone can be found in the table.

Galvanic Isolator
The TCC-0001 Intrinsically Safe Sounder Range is compatible for use with suitably rated Galvanic Isolators. The Galvanic Isolators have the advantage of not requiring an Isolated high integrity earth to be installed to connect the Zener Barriers. These Isolators are often more expensive per unit but may reduce installation costs as the earth is not required. The TCC-0001 range can be powered by the Galvanic Isolators with matching parameters as described in the entity parameters section of the installation sheet. The Sounder can be turned on and off either by us-ing a suitably placed switch in the positive or negative rails (switch must be of suitable ratings if installed in the Hazardous area), or by turning the Galvanic Isolator on and off.

As with the Zener barriers, the second stage alarm can be triggered when using Galvanic Isolators, however an additional Intrinsically Safe relay is required to make the additional connection. As with all equipment in the system, the correct ratings must be main-tained to keep the integrity and safety to the correct levels. The relay can be switched to change between stage 1 and stage 2.

End of line monitoring is applicable to the Sounder Product. For this to function correctly the resistor must be connected between the IN+ termi-nal and the Sounder Negative Supply. A suitable Zener Barrier which can allow reverse polarity monitoring to take place and a fire panel compatible with Intrinsically Safe products must also be used. If required, an external switch can be wired in series with the (1) and/or (2) connections to give independent remote change over from 1st stage to 2nd stage tones. This switch must conform to Intrinsically Safe installation (EN 60079-0:2012 + A11:2013, EN 60079-11:2012, EN 50303:2000).

Maintenance

Little or no maintenance is required during the normal working life of the product. The Klaxon Intrinsically Safe enclosures are resistant to most acids, alkalis and chemicals and have been designed to withstand severe weather conditions. However it is suggested that continuous supervision and periodic inspections may be required in relation to the requirements of the installation as per IEC 60079-17. To avoid the possibility of a potential electrostatic charge build up, it is recommended that the exterior of the product is periodically wiped down with a clean damp cloth. At this point a visual inspection is recommended to ensure that the product is in good working order and no damage has been sustained during its normal operation.

The enclosure is non-conducting and may generate an ignition-capable level of electrostatic charge under certain extreme conditions. It is the responsibility of the user to ensure that the equipment is installed in a location where it will not be subjected to external conditions that might cause a build-up of electrostatic charge on the surface of the unit.

Conditions for Use

The Klaxon Intrinsically Safe Signalling Range uses an enclosure rated at IP66. To ensure that this rating is maintained once installed, a suitable cable gland must be used which matches this level of protection. The base of the unit contains 3x M20 knockouts for wiring in purposes, and only those required should be used. Any that are removed must have at least an IP66 rated gland fitted with cable passing through it or suitable plug.
= meets the IP33C requirements of EN 54-3:2001+A1:2002+A2:2006.

As previously stated in this installation sheet, the Intrinsically Safe Sounder Range must be powered via a suitable Zener Barrier or Galvanic Isolator whose characteristics do not exceed: Uo:28v, Io: 93mA, Po:660mW
The value for Uo must be between 16v and 28v, and Io should not be below 50mA. This range of products is only to be powered via a correctly rated Zener Barrier or Galvanic Isolator. To power these units up without the correctly rated barrier could damage these products and so voids any protection ratings.

Specific Conditions of Use:

1. Clean equipment regularly to prevent dust build-up with a damp or anti-static cloth only.
2. Equipment only suitable for fixed installation.
3. It must be ensured that the equipment is installed in accordance with IEC 60079-14 and IEC 60079-25 and that capacitance and inductance limits are not exceeded by distributed capacitance (Cc) or distributed inductance (Ic) due to cable length.

Table of Entity Parameters

Parameter| Barrier Supply
Ui| 28V
li| 93 mA
Pi| 660 mW
Li| 0
Ci| 0

Tone Table

Note: EN54-3 Compatible Tones are 1,2,3,6,7 & 13
All dB readings have been taken with Intrinsically safe barrier in place, dB readings are ±3dB(A). For EN54-3 Sound Pressure Level Data see Document MOIS02.
www.klaxonsignals.com
sales@klaxonsignals.com

References

• Homepage - Klaxon Signalling Solutions

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