ST. 3400  POWER SUPPLIES

DATA SHEET & Installation Instructions

Introduction

The “ ST” is a range of Linear Power Supplies designed to power equipment used in the Security, Fire, CCTV and Access Control industries.  They are certified to EN.60950 (European Safety Standard) .

The power supplies,  which cover a range of 1, 1.5, 2, 3, 5, 6 and 8 Amp versions,  are available in either 12 or 24 volt models and  supplied in a selection of  housing options (Compact, Horizontal, Vertical, Large or chassis mounted). They may also have optional multi fused outputs.

The ST.3400 is designed to give an output of 3 Amps at 24 volts DC nominal, which includes recharging suitable Sealed Lead Acid batteries via the flying leads provided. It has three LED indicators and a Manual Battery Test facility.

Specification

Mains Input                          230V AC @ 50 Hz, 3 Amp.max.

ST. 3400 output                  3 Amp @ 27.7 volts DC, off load.

Ripple                                    < 0.1 volt peak to peak

Battery recommended      12 volt,  7 amp/hour x 2

Battery recharge                24 hours (80% in 14 hours)

Environment Range          -10 to + 40 deg. C.

Dimensions                         see brochure for enclosure options

Indications

LED –Green                         Mains present  when on.

LED – Red                            DC output fuse blown when on

LED – Yellow                         Indicates Battery Fault on Manual Test.

Fuses

Mains Safety Fuseblock   3.15 Amp,  Ceramic, F, 250V,  20 x 5 mm

Load Output Fuse              3 Amp, L, F, 250V,   (20 x 5 mm )

Installation Notes

Box should be fitted to wall horizontally so that front decal is upright.

Secure box to wall and connect Mains using suitable 3 core 0.75 Cable via anti-strain gland to correct terminals at 230V Input Fuse-block observing polarities.

Mains cable should be routed away from other low voltage circuitry in box.

220-240 Volt Mains should be provided via an un-switched fused spur point, with integral fuse (rated at 3.15 amp, 250 volt, Ceramic) .

Prior to service the fuse in this spur point should be removed and the internal battery disconnected in order to completely power down the unit.

Where identification of the Neutral in the Mains Supply is not possible, an additional readily accessible 2 pole disconnect device must be provided in the building installation.

Connect output load, observing correct polarity, at DC terminals on PCB.

Attach Battery spade leads, Red and Blue,  observing correct polarity.

Apply 220-240 volts Mains and observe that Green LED illuminates.

Remove DC output fuse to check that Red LED illuminates. Replace fuse and ensure that Red LED extinguishes.

Cable ties should be applied to Mains inputs, DC outputs and Battery leads.