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Technical Support: +44(0)23 9269 6638 (option 3) 

  PAK200789_02A July 2019                        ©2019 ELMDENE INTERNATIONAL LTD  

 

 
 

 

 
 

 

24.0V dc 5 Amp Switch Mode Power Supply 

for Fire Detection, Fire Alarm, Smoke and Heat Control Systems (AOV) 

EN54-4:1997 +A1 +A2, EN12101-10:2005,  

and VdS2541:1996-12 (pending) 

2405ST-x 

‘x’ denotes enclosure size

 

 

Thank you for choosing this 2405ST Power Supply. Please read this manual carefully as it provides 

information on how to safely install, commission and maintain this equipment.    
Page 

-  PSU Specification 

-  Installation (Mains feed, Cable sizing, Mounting enclosures) 

-  Installation cont. (Mains Connection, remote fault signalling, Load connection) 

-  Installation cont. (Battery Charger settings) 

-  Installation cont. (Battery installation, Battery compatibility) 

-  Installation cont. (Battery installation, Final commissioning) 

-  Operating Instructions and Maintenance 

-  Trouble shooting 

10 

-  Developer Section (DUAL-PATH, RS485 communication link) 

11 

-  Disposal and Product Compliance 

 

 

                

 

 
Elmdene International Ltd

 

 

Tel:  +44(0)23 9269 6638 

3 Keel Close, Interchange Park, 

 

Fax:  +44(0)23 9266 0483 

Portsmouth, Hampshire, PO3 5QD, UK 

Web:   

www.elmdene.co.uk

 

0333 

OUTPUT MONITORING

2x INDIVIDUAL OUTPUT (DEFAULT)

DUAL-PATH

MAINS 

SUPPLY

+ +

-

- + -

2x LOAD 

OUTPUTS

T T

12V 

BATTERY

+

-

12V 

BATTERY

+

-

MAINS  FUSE

GEN

EPS

FAULT  OUTPUTS

FAULT OUTPUTS

COM / NO / NC

FUSE  #1

FUSE  #2

TEMPERATURE SENSOR

-

LOAD OUTPUT

+

LO AD 1

-

+

LO AD 2

CHARGER MODE

2

1

3

65Ah 

24Ah / 38Ah

7Ah / 12Ah / 18Ah 

(DEFAULT)

ImaxA

5.0A Total

4.0A Total

3.0A Total

SERIES  BATTERY LINK

LED

1
2
3
4

5
6

 

Summary of Contents for 2405ST Series

Page 1: ... Installation cont Battery Charger settings 6 Installation cont Battery installation Battery compatibility 7 Installation cont Battery installation Final commissioning 8 Operating Instructions and Maintenance 9 Trouble shooting 10 Developer Section DUAL PATH RS485 communication link 11 Disposal and Product Compliance Elmdene International Ltd Tel 44 0 23 9269 6638 3 Keel Close Interchange Park Fax...

Page 2: ...r an output voltage 50 Un Fuse Load OP1 and OP2 F5 0 A IEC 60127 2 type Battery Charging Constant current bulk charging to 80 capacity within 24 hours Float charging to 100 within 48 hours with monitored ECO charging Battery Voltage Low battery threshold voltage Deep discharge protection 23 2 V measured at the battery 21 6 V minimum measured at PSU output Quiescent current At no load At battery cu...

Page 3: ...s used for other applications it should be installed according to all relevant safety regulations applicable to that application Cable Sizing 4 Mains input cable must be to the applicable standard with a 5A or greater current capacity i e 0 75 mm2 nominal conductor area having a minimum operating voltage of 300 500V ac 5 The low voltage output cable must be sized to carry the rated load current to...

Page 4: ...onnect the mains power using the disconnect device Connecting the Remote Signalling 14 Connect the EPS and GEN PSU Fault outputs to the appropriate inputs of CIE EPS Fault GEN Fault Condition Possible Cause Action COM TO N C CLOSED COM TO N C CLOSED Normal operation Mains present Battery healthy None COM TO N C OPEN COM TO N C CLOSED Standby Mode Mains lost 8 seconds Battery driving load Investiga...

Page 5: ...r Setting 21 Set the correct charger mode by fitting the jumper to the appropriate charger mode header Use the table below to select the appropriate charger mode Battery mode selected Mode 1 DEFAULT Mode 2 Mode 3 Battery Capacity 2x 12V 7 Ah 12 Ah 17 Ah 24 Ah 38 Ah 65Ah EN54 4 Continuous Output Current No charging Imax B With Charging Imax A 5 7 A c 5 0 A 5 7 A b 4 0 A 5 7 A 3 0 A Constant current...

Page 6: ...24 Ensure all battery terminals are sufficiently insulated to prevent accidental shorting to each other or the enclosure metalwork Warning Always use two 12V batteries connected in series This product will not work with one 12V battery 25 The Battery box is used for 65 Ah batteries and designed to be floor mounted DO NOT suspend from wall 26 It is important that the battery box and the PSU are co ...

Page 7: ...he free positive battery terminal and the black battery lead to the free negative battery terminal CAUTION significant energy can be released from an SLA battery When connecting the last battery lead take extreme care to attach the cable ONLY to the correct terminal Avoid shorting it to any other terminal or conducting surface CAUTION the supplied battery lead contains a temperature sensor DO NOT ...

Page 8: ... Indication Output 2 OK See also Status and Fault Diagnostic LED Indication table for full details of LED indications 38 If connected verify that EPS Fault output shows a com to n c closed contact and the GEN PSU Fault output also shows a com to n c closed contact 39 Disconnect one of the battery leads ensuring that no exposed section of conductor or connector is allowed to contact exposed metal w...

Page 9: ... the PSE other than periodic testing and replacement of the standby battery Reference should be made to the battery manufacturer s documentation to determine typical expected battery life with a view to periodic replacement of the battery TROUBLE SHOOTING Front Panel Legend The PSU will identify a fault the PSU LED3 Further information can be obtained by observing the flash sequence of LED 4 and u...

Page 10: ...able Note LED 4 Flash sequence and refer to table Diagnostic LED 4 Condition Possible Cause Action RED Flash x1 No Output Output fuse fail Output overload or short circuit Check and replace output fuse Disconnect and test output load RED Flash x2 No Battery Low Battery Volts Battery disconnected Battery heavily discharged Low Battery Volts Check battery connections Check battery fuse Check battery...

Page 11: ...e header marked OP1 OP2 This mode meets the requirements of EN54 13 Section 5 3 3 1 SFAULT and Section 5 3 4 2 PFAULT warning conditions for loads above 200mA It is still necessary for the connected equipment to be designed to accept two separate power inputs such that a short to ground of either power transmission path will not inhibit the equipment performance PSU Addressable Data link communica...

Page 12: ...ery type information The battery is marked with the crossed out wheelie bin symbol which may include lettering to indicate cadmium Cd lead Pb or mercury Hg For more information see www recyclethis info The packaging supplied with this product may be recycled Please dispose of packaging accordingly COMPLIANCE This power supply unit meets the essential requirements of the following EU Directives CPR...

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