7. Installation Procedure
WARNING:
Please read this section completely before commencing installation.
Prior to commencing installation of the power supply, ensure that adequate precautions are taken
against static damage to the sensitive electronic components on the A1584 board. You should
discharge any static electricity that you may have accumulated by touching a convenient earthed
object.
The power supply unit should be located in a clean, dry position which is not subject to shock or
vibration and at least 2 metres away from Pager systems or other radio transmitting equipment. The
maximum temperature range is –10°C to +50°C @ 20%-90% humidity. Ensure that adequate
ventilation is provided for the p.s.u at all times over the temperature range stated.
Enclosure/Housing
This type of power supply can be housed within an R3 rack enclosure (forming part of a system) or a
standalone enclosure which can incorporate 2 x 12V rechargeable Lead Acid Batteries. When batteries
are included the enclosure must provide adequate ventilation (see battery manufacturer’s
recommendations).
The power supply should be mounted on to a metal chassis or back plane using the 4 off M4 x 20mm
bolts provided. Each of the four bolts should be spaced with the M5 x 6mm spacers provided. Figure1
provides information relating to the dimensions and locations of the four fixing holes.
Earthing Arrangement.
It is recommended that the incoming Mains primary earth conductor is connected to a Stud or similar
permanent fixed earth point on the intended p.s.u enclosure. The power supply must also be earthed.
Additional earth connections must be made to the power supply chassis from the enclosure earth stud.
There is an earth point connection on the Mains Terminal Block and also an M3 tapped hole (8mm
depth) is available to allow for a ring terminated earth strap to be attached to the p.s.u chassis. It is
recommended that the primary earth is connected to the enclosure earth stud. An earth strap should
then be connected between enclosure earth stud and the psu chassis.
FIGURE 2. Recommended Earthing arrangement
Document Ref: O&M15845T.DOC/Rev 0 22.11.99 Page 7 of 8 Originator KP Checked By Approved By
