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ATS125x 4-Door DGP Installation Manual 21
* Available battery capacities depend on the housing as well. Please refer to maximum battery
capacity in “Specifications” on page 19.
All Auxiliary currents mentioned in the tables above are calculated for the 24 V
auxiliary. For calculation of the maximum load on 12 V auxiliary outputs a correction
factor of 1.6 should be taken into account.
Formula: I
aux
@12 V = I
aux
@ 24 V x 1.6
Example 1
One wants to meet Approval grade EN 1&2 with an 18 Ah battery. The application has
a maximum load of 24 V locks of 800 mA. According Table 9 on page 20, the
maximum available auxiliary current is 1400 mA @ 24 V.
This means that besides the 800 mA for the 24 locks either:
1400 — 800 = 600 mA is left @ 24 V auxiliary or
600 x 1.6 = 960 mA left @ 12 V auxiliary, i.e. auxiliary power, local databus.
Example 2
One wants to meet Approval grade NF & A2P – 2 with an 18 Ah battery. The
application has a maximum local comms load (12 V) of 200 mA. According Table 9 on
page 20, it means that the maximum available auxiliary current is 400 mA @ 24 V.
This 200 mA @ 12 V local comms load results in:
200 ÷ 1.6 = 125 mA @ 24 V and this leaves
400 — 125 = 275 mA @ 24 V for auxiliary (i.e. locks power).
Restrictions
Max 12 V auxiliary current: 1000 mA
Max 24 V auxiliary current: 1600 mA
Maximum auxiliary current can be limited by:
• Discharge duration
Available charge capacity for battery
• Auxiliary fuse
All data is based on a board without external equipment.
Cabling distance
Table 10: Cabling distance
From To Distance Cable type
ATS control panel
system databus (J10)
ATS125x system
databus (CON6)
1.5 km (total databus length
without repeaters)
WCAT 52 or equivalent
Local databus 1 (CON9) RAS 1.5 km (total databus length
without repeaters)
WCAT 52 or equivalent
Local databus 2 (CON10) RAS 1.5 km (total databus length
without repeaters)
WCAT 52 or equivalent
25


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