tycoPSU830 POWER SUPPLY AND BATTERY CHARGER

INTRODUCTION 

The PSU830 power supply is intended for use in MX/ZX/

ZXF/T2000/MX2 fire panels. It is a functional replacement for the PSB800, PSM800, PSB820 and PSB821. 

The PSU830 provides the following features: 

„ Power factor correction (PFC) to minimise loading 

effects on the AC supply and allows operation from 120 

- 240V ac. 

„ Temperature compensated, battery charger for sealed 

lead acid batteries: 

„ Battery disconnection (load shed) when operating from 

battery supply to provide deep discharge protection to 

battery set 

„ Fault monitoring includes:- 

– battery disconnected, battery wiring short, battery 

high resistance, battery voltage low, battery reverse, 

temperature compensation fault, ac supply low, 

internal charger fault 

„ Common fault output - volt free relay contacts 

„ Diagnostic LEDs for 

– AC ok 

– Battery fault 

– Charger fault 

– Ground (earth) fault 

„ Two 27VDC fused field supply outputs with short circuit 

protection, one output may be reset (turned off) under 

command from fire panel 

„ 40VDC 2.2.A output for supplying up to 4 fully loaded 

MX Digital loops, typically a single PSU830 may 

replace two PSB800 40V 1.2A supplies 

„ 5VDC output for use within fire panel/repeater 

„ Selectable Ground (earth) fault monitoring 

„ Battery charging function of two PSU830 may be connected in parallel 

TECHNICAL SPECIFICATION 

The PSU830 complies with the requirements of: 

„ EN 54-4/1997:A2-2006 Fire Detection and fire alarm 

systems; part 4, Power supply equipment 

SYSTEM COMPATIBILITY: 

„ Use only with MX/MX2/ZX/ ZXF/T2000 Fire Alarm 

Controllers 

ENVIRONMENT 

„ Indoor Application only, Land and Marine 

„ Operating Temperature: -10o

 to +55oC 

„ Storage Temperature: -20o to +70oC 

„ Operating Humidity: Up to 95% non-condensing 

DIMENSIONS (HWD): 

„ 62 x 132 x 242mm 

EMC 

„ The PSU830 complies with the following: 

„ Product family standard EN50130-4 in respect of Conducted Disturbances, Radiated Immunity, Electrostatic 

Discharge, Fast Transients and Slow High Energy 

„ EN 61000-6-3 for Emissions 

ELECTRICAL CHARACTERISTICS 

„ Input Voltage: 120-240Vac 50/60Hz (autoranging) 

„ Input Current Rated Load: 0.8-2.2ARMS

„ Rated input power: 200W maximum 

Fig. 1: PSU830 power supply and battery charger

NOTICE

Sealed lead acid batteries cannot be reliably 

charged when ambient air temperature 

around them (the battery ambient) exceeds 

50° C. 

„ Outputs 

– Non-reset: 

27V dc @ 2A

5V dc @ 2.2A Rated, 3.0A max

40V dc @ 2.2 Rated, 2.3A max

– Reset: 27V dc @ 2A

„ +27V: 21-28.8Vdc (typically 27.3V with battery fully 

charged) 

„ +40V: 39.5-40.3Vdc 

„ +5V: 4.8-5.25Vdc 

„ Rated Output 

„ Rated output of 5A to supply the panel, fire system 

loads and charge 24V battery. De-rate to 4.5A when 

used at 120VAC and ambient above 40ºC, e.g. some 

T2000 Marine applications. 

„ Maximum Alarm current 5A for 30 minutes 

„ Maximum continuous load current (excluding charging) 2.5A 

„ Rated output power: 136W 

The PSU830 cannot support all outputs fully loaded, the 

following output load combinations are possible in MX 

panel application: 

BATTERY CHARGER

A PSU830 may be used to charge 17Ah or 38Ah battery 

sets. To meet the requirements of charge to 80% rated 

capacity within 24 hours with a 38Ah battery set it is recommended that 2A or greater be allocated for battery 

charging. Points to note:

„ Trickle charge determined by battery capacity, typically 

100mA at 27.3Vdc. 

„ Maximum charging voltage 28.8V, battery at -5ºC. 

„ Minimum charging voltage 21V, condition battery discharged. 

„ Deep discharge protection, battery disconnection voltage < 20V. 

The PSU830 is not recommended for use with batteries 

that have been deep discharged. 

Recommended temperature for charging battery -5 to+ 

40ºC measured in the battery housing with thermistor lead 

assembly within 2cms from battery. Sealed lead acid batteries cannot be reliably charged when ambient air temperature around them (the battery ambient) exceeds 50ºC. 

Two PSU830 may be connected in parallel (dual PSU configuration) to provide charger output of up to 10A. All other 

outputs remain separate, i.e. 2 x 5V, 4 x 27V, 2 x 40V and 

must not be connected together. To meet the requirements 

of charge to 80% rated capacity within 24 hours with a 

65Ah battery set it is recommended that 3.4A or greater 

be allocated for battery charging. 

BATTERY REQUIREMENTS 

17Ah or 38Ah single PSU830. 

38Ah dual PSU830. Do not charge 17Ah batteries with 

dual PSU830s.

„ Standby Current Consumption: 90mA @ 24V dc 

FAULT MONITORING AND RESPONSE 

FAULT CONDITIONS THRESHOLDS

„ Low AC, < 100VAC. 

„ Battery low <22VDC

„ Battery disconnect < 20VDC

„ Battery High Resistance: 

– Single PSU: 0.6Ω

– Dual PSU: 0.3Ω

This is the maximum resistance of the battery circuit including battery, wiring and connections to the charger.