TECOM TS1066 - Appendix B: Output Fusing and User Current Limits

34
Appendix B: Output fusing and user current
limits
The current draw on the Network Access Controller for all user devices must not
exceed 3 A. This value excludes battery charging and standalone board current.
The Network Access Controller will shut down if this is exceeded.
In some environments, further restrictions on user current apply as detailed in
Appendix C.
On-board fuses provide over-current protection for devices as described in
Table 4 below. The numbers in the Item number column refer to items in Figure 2
on page 13.
Table 4: Maximum current draw per output
Device
Item number
Maximum current draw
Auxiliary power
5
0.81 A
Siren output
6
1.25 A
Four onboard relays
9
1.7 A each (when using lock
power 12v and 0v)
Active relay coil
9
55 mA
Relay card
12
0.5 A
BUS 1
17, 19, and 20
1.0 A total
BUS 2
18
0.5 A
Lock power 1
31
1.9 A
Lock power 2
21
1.25 A
Consider the maximum current draw from the devices above when calculating
the total user current draw.