TYCOPSU830 POWER SUPPLY AND BATTERY CHARGER

„ Earth (ground fault), operates on the 0V, 5V, 27V and 

40V rails. Sensitivity varies with rail with respect to 

earth 

– 40V and Loop SIG < 300kohm 

– 27V < 100 kohm 

– 0V and Loop RTN < 22kohm

Fault Response

Battery charging terminals 

shorted: Isolates output or ruptures fuse

Battery charger connected 

to 12V battery: Isolates output

Battery reverse connection: Ruptures fuse

Below final voltage

(Deep Discharge): Battery disconnected

FAULT RESPONSE TIMES 

EN54.4 requires all faults other than battery resistance to 

be detected and indicated within 15 minutes, for the 

PSU830 this time is less than 14 minutes. Battery resistance fault must be indicated within 4 hours, for the 

PSU830 this time is less than 70 minutes and less than 14 

minutes once a battery resistance fault has been detected. 

 FAULT RELAY 

The normal state of the fault relay contacts is closed, indicating no fault. Any faults detected will cause the fault relay 

contacts to open. When the PSU830 is not powered the 

state of the fault relay contacts is open. 

BATTERY LOW

Battery low is not indicated as a fault at the PSU830. This 

signal is monitored by the fire panel to indicate that the battery is partially charged.

27V OUTPUTS

Each 27V output is protected by a 2A fuse. To obtain current up to 5.0A use PTM800 and 12-way cable assembly 

from CON1. The PTM800 provides 27V at terminal TB2-

3, to this may be connected to an FB800 fuseboard.

DUAL PSU OPERATION 

Fault monitoring outputs are connected in parallel and cannot distinguish which PSU830 is faulty, the fault status 

LEDs on each PSU should be used. 

Fault Response

Battery charging terminals 

shorted: Isolates output or ruptures fuse

Battery charger connected 

to 12V battery: Isolates output

Battery reverse connection: Ruptures fuse

Below final voltage

(Deep Discharge): Battery disconnected

Indicator Colour Function 

Ground Fault 

(earth fault) 

YELLOW Normally OFF 

ON when dc leakage current 

detected between Chassis 

Ground and conductors of 

cables from panel including: 

MX Digital Loop SIG+ and 

SIG-; 

Remote Bus; 

+27V dc; 

0V (dc common) 

CGR/NTC 

fault 

YELLOW Normally OFF 

On when: 

 Charger not charging battery, 

 Thermistor faulty, 

 Thermistor lead broken. 

Battery fault YELLOW Normally OFF 

ON when: 

 Battery disconnected, 

 Battery wiring short, 

 Battery high resistance, 

 Battery below final voltage. 

AC OK GREEN ON when AC supply healthy.

OFF when AC removed or 

very low. 

T

INSTALLATION, GENERAL POINTS

„ For MX2, ZX4, ZX4BB panels the second (auxiliary) 

PSU830 is installed on top of the first (primary) 

PSU830. 

„ For MX4000 and MX4000BB, panels the auxiliary 

PSU830 is installed in the battery housing. The distance between the housings is constrained by the length 

of the interconnecting cables. The recommended 

installation is battery housing beneath fire panel.

„ Connection of primary and auxiliary AC power leads is 

via a distribution block supplied with kit 557.201.231. 

The external AC supply is connected to a socket which is 

mated with distribution block. 

„ If FB800 fuseboard is required it may be mounted on 

small chassis plate above the batteries or on top of auxiliary PSU830, if the latter then PTM800 must be 

mounted on the side of the PSU830. 

„ The PTM800 should be mounted on the top of the 

PSU830 for MX4000 and MX4000BB panels. For 

ZX4 and ZX4BB it can either be mounted on top or on 

the left hand side with restricted access. For MX2 it 

would be sited on the left hand side.

„ For the ZX4 and ZX4BB panels, nylon cable ties are 

required to attach the distribution block to the metal 

bracket inside the panel housing. 

„ Monitoring of the auxiliary PSU830 is provided by ribbon cable connected between both power supplies.

„ Battery capacity must not be less than 38Ah when dual 

PSU830 is used as there is possibility of overcharging 

with smaller capacity batteries.

CONFIGURATION 

HEADERS AND LINKS 

The PSU830 has three headers to which are fitted jumper 

links, these headers enable selection of the following: 

„ Earth (ground) fault monitoring, there can only be one 

Earth fault monitoring circuit active at the fire panel. 

„ Output CON3.2 +27V may be reset (turned off) under 

CIE control. 

„ Unit may be configured for single unit or dual unit operation, link selects between primary (master) and auxiliary (slave). There can only be one primary and one auxiliary connected together, no other combinations are 

permitted. PSU830 cannot be mixed with any other 

PSU. 

Refer to Table 3, 4 and Figs. 2, 3, 4 for details of terminal 

block CON3, header and wiring configurations.