Reference Guide
IMACS System Release 5.1.9
3-9
System Installation
Power Supplies and Ringing Generators
The -48 VDC talk battery can be provided from an external source, or by using a 115 VAC to
-48 VDC Converter. This unit is only available for 115 VAC sources. A similar AC-to-DC
Converter is also available for use with either 115 or 220 VAC.
3.4.3
Setting the U.S./European Configuration Jumper
Before inserting any cards into the chassis, set its JP1 jumper for either the U.S. or European
configuration. This jumper is shown in Figure 3-5; it is on the resource card backplane and is
accessible from the chassis front. The default jumper setting is
US
(for systems in the U.S. and
Canada). To change the chassis electrical configuration for European compliance (
EUR
),
move the jumper to pins 2 and 3.
Figure 3-5. JP1 Jumper Settings
Also be sure to set the jumper on the system resource cards and external alarm cards to agree
with the above setting for the chassis. Refer to the associated chapters in this guide for
information on those card jumpers.
3.4.4
Installing the System Power Cards
Next, install power supplies, AC-to-DC power converters and ringing generators into the
system chassis as described in this section. However, do not apply power to the system until
you finish installing these cards, AND after making the power and ground connections to the
chassis as described in the next section of this chapter.
CAUTION!
Failure to follow the procedures mentioned above will result in damaging the boards.
1
2
3
JP1
EU
R
/US
1
2
3
JP1
EU
R
/US
U.S. Configuration
European Configuration
