14
ECC-50/125DA Instruction Manual —
P/N LS10027-000FL-E:D 5/21/2015
ECC-50DA Remote Amplifier
Installation
3. Connect the red wire from the battery harness to the positive (+) side of battery #1.
1.1.9 Calculating Current Draw and Standby Battery
This section helps determine the current draw and standby battery needs for your installation (18
Ampere Hours max. will fit in cabinet). Complete the remaining instructions in Table 1.3.
For batteries larger than 18 AH, use the BB-26 or BB-55F Battery Box. A maximum of 33 Ampere
Hours is allowed per system.
+ –
CIRCUIT 4
CIRCUIT 3
CIRCUIT 2
CIRCUIT 1
IN
IN
IN
IN
+
+
+
+
–
–
–
–
OUT
OUT
OUT
OUT
+
+
+
+
–
–
–
–
AU
DI
O E
XPA
ND
ER
BATTERY
Figure 1.11 Battery Connections to the ECC-50DA
Battery 1
Battery 2
Note:
Batteries have been
rotated to show the top sides
for illustration purposes only.
50
dab
att
.w
m
f
Device
No. of
Devices
Current Per Device
Standby
Current
Alarm
Current
ECC-50DA (25V system)
1
Standby: 85 mA
85 mA
Alarm: 525 mA
525 mA
ECC-50DA (70.7V system)
1
Standby: 100 mA
100 mA
Alarm: 580 mA
580 mA
ECC-CE4
0 or 1
Standby: 20 mA
Alarm (All Channels): 180 mA
mA
A
Current Subtotals:
mA
mA
Notification Devices
Refer to device manual for number of devices and current ratings.
B
Current Subtotals:
mA
mA
C Total current rating of all devices in system (Line B) X .001
A
A
D Number of standby hours (24 or 60 for NFPA 72)
H
E Multiply line C (standby current) and D:
Total standby AH
AH
F Alarm sounding period in hours (For example, 5 minutes = .0833 hours):
H
G Multiply line C (alarm current) and F:
Total alarm AH
AH
H Add lines E and G (AH = Ampere Hours):
Total AH required
AH
Table 1.3 Current Draw Calculations
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