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

 

PAK200608_01F   Jan 2021                     ©2019 ELMDENE INTERNATIONAL LTD  

 
 
 
 
 
 
 
 

27.6V dc  2A Switch Mode Power Supply for Fire, Access and General Applications 

STX2402-MOD 

 
 

F

EATURES

 

 

 
The STX2402-MOD is an un-boxed switch mode power supply ideal for use in Fire, Access Control and 
General Applications.  Its regulated 27.6V dc output will supply up to 2.0 Amps continuously into the 
load, in addition to providing up to 700mA for charging the standby batteries up to 18Ah. The power 
supply  output  features  electronic  short  circuit  protection  under  both  mains  and  standby  battery 
operation. Maximum battery life is assured through continuous active battery monitoring and the use 
of  a  two  stage  charger,  comprising  bulk  and  temperature  compensated  final  float  phase  depending 
upon battery condition. Once fully charged the product operates in Eco power saving mode, whereby 
the batteries are charged for 4 hours in every 24 hour period while still being continuously monitored. 
This reduces wasted energy in charging already fully charged batteries and extends their working life. 
Deep  discharge  protection  prevents  premature  battery  failure  when  operating  from  standby  for 
extended  periods.  Two  sets  of  volt  free  solid  state  relay fault  output  signal  (i)  loss  of mains  and  (ii) 
battery fault, charger fault and loss of output.  
 

 

 

Up to 2.0A current to load at 27.6V dc nominal regulated output. 

 

Charging capability to support 7Ah or 17/18Ah batteries. 

 

Electronic overload protection shuts down output until overload or short circuit is removed. 

 

Battery  Monitor  detects  battery  missing,  low  battery,  short-circuit  or  reverse  connection  or  circuit 
impedance (Ri) in excess of 500m

 caused by connector or wiring  corrosion within 4hours. 

 

Battery charging circuit is energised only when a battery is correctly connected and the battery voltage 
is greater than 14V. 

 

No loss of output during automatic connection of battery to load on loss of mains. 

 

Deep discharge protection disconnects battery from load when battery voltage falls below 21V. 

 

Diagnostic indicator LED (Orange) (Internal). 

 

Fault indicator LED (Yellow) flashes on detection of output fault, battery fault, charger fault and mains 
failure. 

 

Mains indicator LED (Green) showing mains present Indicators check at start-up. 
 

 

                

 

 
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

 

 0843-CPR-0416 18 (UL) 

2531-CPR-CSP11220 20 (DBI) 

Содержание STX2402-MOD

Страница 1: ...mature battery failure when operating from standby for extended periods Two sets of volt free solid state relay fault output signal i loss of mains and ii battery fault charger fault and loss of outpu...

Страница 2: ...2 5A 2 0A 2 5A 1 8A Battery Capacity eg PowerSonic model Yuasa model Interlogix model 2 x 2 1Ah 12V PS12021 NP2 1 12 2 x 7Ah 12V PS12070 NP7 12 2 x 17 18Ah 12V PS12170 NP17 12 BS131N Battery Charging...

Страница 3: ...S Fault GEN Fault Condition Possible Cause Action CLOSED CLOSED Normal operation Mains present Battery healthy None OPEN CLOSED Standby Mode Mains lost Battery driving load Investigate loss of mains C...

Страница 4: ...ctive Battery charging normally but 90 of full charge None 2 PULSES ON No Battery Battery disconnected Battery fuse blown Battery heavily discharged Check battery connections Check battery fuse Check...

Страница 5: ...d with a 5A or greater current capacity i e 0 75mm2 nominal conductor area having a minimum operating voltage of 300 500V ac 2 The low voltage output cable must be sized to carry the rated load curren...

Страница 6: ...and Negative terminals of the batteries to the PCB terminals Batt and Batt using the cables provided See Figure 2 and 3 13 Connect the battery temperature sensor two white wires to the PCB terminals T...

Страница 7: ...a battery fault or a GEN PSU fault the corresponding Fault signal contacts will open If the output of the PSU fails the cause of the failure should be investigated e g short circuit load connection o...

Страница 8: ...oduct any batteries must be removed and disposed separately via an appropriate approved battery disposal route in accordance with all national and local regulations Package used batteries safely for o...

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