Gas Safety Unit - GSU

Technical Section

To Add To Add

Unit Customisation Customisation

Description Order Code Option 1 Option 2

(Example - A GSU with no customisation option without a Shutdown Button Shroud = 16.008)

(Example - A GSU with no customisation option and a Shutdown Button Shroud = 16.008S)

(Example - A GSU with customisation option 1 = 16.008A)

(Example - A GSU with customisation option 1 and a Shutdown Button Shroud = 16.008AS)

(Example - A GSU with customisation option 2 = 16.008B)

(Example - A GSU with customisation option 2 and a Shutdown Button Shroud = 16.008BS)

GSU 16.008 A B

Wallmount Kit is Included, Extra Wallmount Kit - 10.002

We will be in touch to ask for your pneumatic connection requirements

Additional Mounting Options

Cassette Mounting System - 09.012

Space Saver Cassette Mounting System - 09.013

If a Cassette is ordered we will be in touch to ask if there are

any retrofit bracket requirements with your order.

Our Technical Pages have been enhanced and optimized for Mobile Phone compatibility, this is to allow installers to easily be able to follow our installation procedures on site if required

Shutdown Button Options

We fit Schneider Emergency Shutdown Buttons to our units

these are very high quality ultra reliable safety devices

which have a strong shutdown operation

however you may also require a shutdown button shroud to be fitted if your unit is being installed somewhere the shutdown button may be easily pressed, our shutdown button shrouds are made of high quality metal construction and they are also padlockable for when you are performing maintenance and require a method of ensuring that any control valves connected to your GSU are rendered inoperable. Your GSU will arrive with the shutdown button shroud fitted if ordered.

£49 + VAT

Pneumatic Connections

We are able to supply your GSU with various options of pneumatic connections

3.2mm Rigid Tube

4.0mm Rigid Tube

6.0mm Rigid Tube

Pipe O/D(mm) I/D(mm)

4 2.5mm Nylon Tube

6 4 mm Nylon Tube

3.18 2.18mm Soft Nylon Tube

3.18 2mm Polyurethane Tube

4 2.5mm Soft Nylon and Polyurethane Tube

6 4 mm Soft Nylon and Polyurethane Tube

Electrical Supply

AC Range - 85 to 264V @ 47 TO 440 Hz

AC Current (Typical) 0.03A/230V AC

Fixed 3-Metre long cable supplied with a fused 3A UK 3 pin plug.

Site wire to a double pole switched fused outlet with a 5 Amp fuse

Ultra Low Power

Fuses (Located on PCB)

24V DC Supply Fuse (F1) - 630mA 20 x 5mm Thermal

Internal Mains Supply Fuse (F2) - 2A 20 x 5mm Thermal

Digital Inputs (Non Isolated)

Supply Voltage (provided by GSU) +24V DC

Input Current at 24 V DC 7.2 mA

Inputs compatible with normal dry contact switches, PNP / NPN

Digital Outputs (Dry Contact Volt Free)

Current Rating 0.5A @ 24V DC

Enclosure

Material - ABS

Rating - IP65

Dimensions - 271 x 120 x 170 mm

Colour - Light Grey RAL 7035

Mounting Holes - Accept 4 x M4 screws

ALU is Supplied with a Wall Mounting Kit

Optional Cabinet Mounted Cassette System Available - CLICK HERE for more information.

Design Compliances

Designed in compliance with

BS EN 60204-1:2018 Safety of machinery. Electrical equipment of machines

Tested and FULLY compliant with

EN 61326-1:2021 Electrical Equipment for Measurement Control and Lab Use - EMC Requirements.

EN 55011:2016+A2 Conducted RF Emissions

EN 55011:2016+A2 Radiated Emissions
EN 61000-4-2:2009 Electrostatic Discharge
EN 61000-4-3:2006+A2 Radiated Immunity 80 MHz to 6 GHz
EN 61000-4-4:2012 Fast Transient and Burst Immunity
EN 61000-4-5:2014+A1 Surge Immunity
EN 61000-4-6:2014 Conducted RF Immunity
EN 61000-4-11:2020 Mains Dips and Interruptions
EN 61000-4-8:2010 Power Frequency Magnetic Field Immunity

Mounting (with included Wall Mounting Kit)

Connecting Digital Inputs

The GSU is supplied with Blanking Plugs fitted to maintain sealed integrity, A separate cable gland is supplied for each Digital Input which can be found inside the monitor.

1 With a flat bladed screwdriver insert it into the gap on the right hand clip as shown and either twist or lever the screwdriver to the right to open the clip and you will find the cable glands. 2 With an appropriate screwdriver remove the required blanking plug and using the same seal and nut 3 fit the cable gland, Repeat the procedure to accommodate the amount of Digital Inputs you require

DO NOT remove a blanking plug and fit a cable gland if it is not required as this will result in loss of sealed integrity and may invalidate your warranty.

2

1

Inside you will find the cable glands.

If for any reason the cable glands are missing please contact your supervisor or your installer.

(The M16 cable gland supplied in the kit is generally used for connecting Outputs)

3

Please Note that each input works differently in operation and you must first familiarize yourself with how each input works when in operation to ensure correct required operation if you are wishing to use an input for something else,

Details of how the inputs work in operation can be found on our GSU Overview Page.

It may be useful to fill out a Configuration Sheet for your future reference and also to mark/label your input cables for easy identification, You can download and print an GSU Configuration sheet HERE or from our Downloads page for you to fill out and print or print and fill out to save or file for your future reference.

Feed your Input Cable

through your Cable Gland

1

2

We recommend that you

crimp wire ferrules or

bootlace ferrules to the

bare wires

3

Unplug your required

green Input plug

4

Wire your 2 wires into

your green Input Plug

(I/P and 0v) as marked on the PCB

5

Plug your wires back into the

socket and tighten the Cable Gland

If you have a 3-wired device and are unsure how to

establish which 2 wires you need then please use

our simple guide to identify which wires you need

for the correct operation

Which can be found HERE

There may be a situation where your installation does not have all of the sensors listed on the GSU, in this case the alarm/input that you do not require will need to be linked otherwise your GSU will be in alarm condition,

To link the un-required alarm you will need to fit a jumper wire between the I/P and the 0V of the required input

(you can use the AUX input as an example as there is a link fitted as default)

If you would like to use the AUX input as a Shutdown alarm simply remove the wire link and wire your sensor wires to replace the link that you remove (I/P and 0V)