Technical Manual - Tunstall GmbH

Power supply unit UPS 60, Order No. 77 3400 10
The power supply unit UPS 60 is a power supply unit and includes the electronics that builds up an
uninterrupted power supply (UPS) in combination with battery set for UPS 60 (order no. 77 3450 00).
Input voltage of 115 - 230 V AC is transformed into 24 V DC output voltage. The UPS feature ensures
the supply of the connected DC users also in case of a mains power failure.
If the mains input voltage fails or when it drops to less than 90 VAC, the two connected lead batteries
will continue to supply the users without any interruption.
To protect the batteries from going flat, circuit breakers will open when during the UPS mode the
output voltage drops below to 19.5 V. When the mains supply voltage is active again, the system
reverts to its normal operating mode.
Roughly every 15 minutes, an integrated test circuitry performs a voltage check at the battery
terminals, the connections and at the circuit breakers. Upon the return of the mains supply current, the
battery is isolated from the outputs, and the internal charging module recharges the battery.
Safety instructions
1. Mounting
• Non-compliance with the safety instruction or improper handling of the unit (e.g. skin
contact with live components when the unit is open) can be extremely dangerous.
• The power supply unit UPS 60 should only be installed and commissioned by
qualified specialists.
• Before effecting any work at or with the unit, it must be isolated from any voltage
(mains or battery).
• Connection to the mains supply must be executed acc. to the valid national
regulations (for Germany: VDE 0100 and VDE 0160).
• Fuse or circuit breaker must be provided for safe isolation from the input (mains)
current.
• Overheating of the unit may occur when the values as shown in the technical data
are exceeded. This may lead to permanent damage to the unit, and system safety is
jeopardised.
• Always watch for the safe isolation of AC and DC circuits!
• Observe the general safety instructions for the handling of batteries! Sufficient
ventilation must be provided to preclude the development of an explosive hydrogenair
mixture!
• If the power supply unit UPS 60 will not be used for a longer time, first the batteries
have to be fully charged. After that the power supply unit UPS 60 has to be
disconnected from the mains supply. Furthermore the battery connection cable must
be disconnected from the battery set for UPS 60 (see chapter 2.1). Alternatively the
battery fuse in the battery set for UPS 60 can be removed.
The power supply unit UPS 60 is designed for wall mounting. Bore holes are prepared at the housing
for fixing the unit at the wall using the enclosed mounting material. A dimensional drawing is shown on
the next page.
Before mounting, check the condition of the wall itself.
The power supply unit UPS 60 weighs approx. 4 kg.
The unit must be mounted such that the venting ports are at the top and bottom.
The selected location must ensure sufficient air circulation above and below the unit. Therefore, check
for minimum distance of 50 mm to walls, ceiling and other equipment. The venting ports must not be
covered up. Insufficient air circulation may lead to damage to the power supply unit.
© Tunstall GmbH, Orkotten 66, 48291 Telgte, Germany, www.tunstall.de, 00 8802 81, Rev. 2.1 (05/2008) English - 1
Technical Manual Page 144