Service Manual

6802800U74-AN
Chapter 3: Site Preparation
84
Expansion Cabi-
net Consump-
AC
When Heat AC
DC
tions MTS 800
Heat
Charg When
-48
Heat
MHz Configura- AC
AC
ing Charg-
V
DC
tion (W)
(W)
(W) ing (W)
(W)
(W) Comment
MTS4 with 4 BRs 144
1345
2205 1515
141
1310
High power PA,
w. MTCC/ATCC 5
0
fans
NOTICE:
• All the values in the table are calculated from AC = 230 V
• Add additional 5% for 110 V
• Charging is up to 6 A per PSU
3.7.2.2
AC and DC Current Load
WARNING: The MTS has a 2mA minimum power consumption even when the Power Supply
Unit (PSU) is switched off. The switch only disconnects DC outputs and charging currents. In
case of the field repair, disconnect all PSU connecting cables.
3.7.2.3
Backup Battery
The backup battery is normally located near the cabinet(s). The recommended batteries to be used are
a VRLA (Valve Regulated Lead Acid) recombination type, with -48 VDC nominal.
3.7.3
Surge Arrestors
For details on surge arrestors, see Surge Arrestors and Suppliers on page 456.
IMPORTANT: To transport lightning strikes away from the equipment, install the lightning
arrestors.
NOTICE: Install a lightning rod on a different tower leg than the antenna.
3.7.4
Power Panel
Use a standardized power panel including circuit breaker layout in all sites where an MTS is installed.
Leave vacant space to allow for future requirements.
3.8
User Alarms, Control Outputs, and Door Alarm
The MTS in all configurations has the following alarm inputs and control outputs:
• 15 x 12 V opto-isolated alarm inputs: Available on the junction panel. Alarm inputs and Alarm
ground are floating.
• D60_MTS2and4_MidpowerPA_CLE6165A_A