Klaxon Syrex IS-XN Zones, Gas Groups and T Rating, Terminals + and power supply, Installation

SPECIAL CONDITIONS FOR SAFE USE (as stated in the EC Type Examination Certificate SIRA 05ATEX2269X)

Conditions for Syrex IS-XN Beacon

The equipment has an ingress protection rating of IP65. However, if it has been supplied without cable entry devices, then the user shall ensure that the devices that are fitted will provide an ingress protection that is appropriate to the environment in which it is installed i.e. IP20 or better. If only one of the two cable entries are used, then the unused entry ©knockout©shall be left intact or fitted with a blanking device that ensures ingress protection appropriate to the

©O©Ring Seal

Input Terminals

Flash Rate

Header Pins

Syrex IS-XN Beacon	Flash Rate
-	1Hz
+	2Hz

environment in which it is installed i.e. IP20 or better.

The equipment shall not be directly installed in any process where its enclosure might be electro-statically charged by the rapid flow of a non-conductive media.

4.2 Zones, Gas Groups and T Rating

The Syrex IS-XN beacon has been certified EEx ia IIC T4. When connected to an approved system it may be installed in:

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.
Be used with gases in groups:
Group	A	propane
Group	B	ethylene
Group	C	hydrogen
Having a temperature classification of:
T1	450ºC
T2	300ºC
T3	200ºC
T4	135ºC

4.3 Terminals + and - power supply

Power is supplied to the beacon via terminals + and - which have maximum input safety parameters of:

Ui	=	28V
Pi	=	1.2W
Ci = 0		Li = 0

Syrex IS-XN beacons may be powered from ATEX certified Zener barriers or galvanic isolators certified by an EC Approved Body which have output parameters equal to or less than 28V and 1,2W

Up to three Syrex IS-XN beacons can be connected in parallel and be powered from a common barrier or isolator. Parallel connection of beacons will significantly reduce the brightness of each device.

The maximum permitted cable parameters defined by the barrier or isolator certificate must not be exceeded.

Fig 1 Location of field terminals and controls.

5. INSTALLATION

In addition to the certification requirements shown in section 4.2, the environmental conditions must be within the limits shown on the product specification. The beacon enclosure provides IP65 protection and is suitable for installation in an exterior location if an appropriate sealed cable entry is used. Syrex IS-XN beacons should only be installed by trained competent personnel.

5.1 Mounting

The Syrex IS-XN beacon may be secured to any flat surface by inserting two mounting screws through the back of the round base (see figure 2). The enclosure provides IP65 protection and is suitable for installation in exterior locations provided that the area around the two mounting screws through the back of the base moulding has been sealed and that suitable cable glands with the required IP rating have been used. The lens should be aimed towards the area where maximum visibility is required.

5.2Installation procedure

a.Unscrew the beacon unit security screw and remove the beacon section from the base by turning it anti- clockwise. Ensure that the ‘O’ ring seal remains in place.

b.Remove the required 20mm knockout section(s) depending on system wiring and mount the base to a flat surface by inserting two screws through the back of the base.

c.Fit the required number of 20mm cable glands or conduit entries into the base and connect the field wiring to the appropriate beacon terminals as shown in section 6 and Fig 1 of this manual.

d.Check that the ‘O’ ring seal is correctly located on the beacon section (see Fig. 1) and insert the beacon section into the base. Push it fully home and turn it clockwise to align the mouldings before tightening the security screw.

Fit mounting screws	20mm knockouts
through base

Fig 2 Mounting Beacon Base.

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Klaxon Signals Ltd. Wrigley Street, Oldham, Lancashire UK OL4 1HW			sales@klaxonsignals.com	Tel: +44 (0)161 287 5555
Document No. Klaxon Syrex IS-XN	Issue: A 11-11-05	Sheet 2 of 3	www.klaxonsignals.com	Fax: +44 (0)161 287 5511