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

 

PAK200607_01D    Jan 2021                    ©2019 ELMDENE INTERNATIONAL LTD  

 

Connections and Signalling outputs 

Load / - 

Screw terminals Voltage output to load  

GEN PSU Fault  (normally 
closed contact) 

0.10A @ 60V 

dc 16Ω solid state relay contact

s, volt free 

Open if Mains failed and battery voltage <23V or fault PSU fault 
condition, (see below) 

EPS Fault  (normally closed 
contact) 

0.10A @ 60V 

dc 16Ω solid state

 relay contacts, volt free 

Open if loss of mains for >10 seconds 

Temperature sensor 

Thermistor input from supplied battery terminal thermistor. 

BATT + / - 

Connection to back up battery using supplied battery lead. 

 
 

S

IGNALLING AND 

D

IAGNOSTICS

 

 

 

Fault Outputs 

EPS Fault 

GEN Fault 

Condition 

Possible Cause 

Action 

C

LOSED

 

C

LOSED

 

Normal 

operation 

Mains present 
Battery healthy 

None 

O

PEN

 

C

LOSED

 

Standby 

Mode 

Mains lost 
Battery driving load 

Investigate loss of mains 

C

LOSED

 

O

PEN

 

Fault 

Present 

Blown fuses 
Battery fault 
Internal fault 

Investigate fault source 
using diagnostic LED 
Rectify fault where 
possible 

O

PEN

 

O

PEN

 

PSU 

Shutdown 

Mains lost 
Standby battery exhausted 

Restore mains as soon 
as possible 

 
 

LED Indication 

YELLOW LED  

Fault LED 

GREEN LED 

Mains supply On 

DIAGNOSTICS 

Diagnostic LED  

 
 

Fault Diagnostic table 

 Front panel - User 

Yellow LED 

Fault 

Green LED 

Mains 

Condition 

Possible Cause 

Action 

O

FF

 

O

N

 

Normal 

operation 

Mains present 
Battery healthy 

None 

F

LASH 

C

ONTINUOUS

 

O

or

 

O

FF

 

Fault 

Blown fuses 
Battery fault 
Internal fault 

Contact service 
engineer 

1

 

P

ULSE

 

O

FF

 

Standby Mode 

Mains lost 
Battery driving load 

Investigate loss of 
mains 

 

Summary of Contents for STX2401-MOD

Page 1: ...arge 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 cha...

Page 2: ...charging Imax A 1 5A 1 2A 1 5A 1 2A Battery Capacity eg PowerSonic model Yuasa model 2 x 1 2Ah 12V PS12021 NP1 2 12 2 x 7Ah 12V PS12070 NP7 12 Battery Charging Constant current bulk charging to 80 cap...

Page 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...

Page 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...

Page 5: ...ard 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 curr...

Page 6: ...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 Temp...

Page 7: ...ENANCE This unit is intended for use by Service Personnel only There are NO USER SERVICEABLE parts inside There is no regular maintenance required of the PSU other than periodic testing and replacemen...

Page 8: ...ed via an appropriate approved WEEE disposal route in accordance with all national and local regulations Before disposal of the product any batteries must be removed and disposed separately via an app...

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