System calculations
QS4 Technical Reference Manual
A.9
(A) Base panel current load calculation
Card
Qty
Standby
Current (mA)
Qty
××××
Standby
Current (mA)
Alarm
Current (mA)
Qty
××××
Alarm
Current (mA)
PS6
1
82
82
100
100
CPU/Display
117
135
SL30 (–1)
[1]
1
1
SLIC
33
57
DLD
13
20
ZB16–4
117
152
ZA8–2
73
116
X485
60
60
ZR8
[2]
11
18
Totals
[3]
Notes
[1] Add 0.75 mA for each energized LED.
[2] Add 18 mA for each energized relay.
[3] Base panel current must be less than 1.32 mA.
(B) Smoke/Accessory (SMK/ACC) Power current load calculation (max 250 mA)
Card
Qty
Standby
Current (mA)
Qty
××××
Standby
Current (mA)
Alarm
Current (mA)
Qty
××××
Alarm
Current (mA)
CPU/Display
[3]
117
123
SL30 (–1)
[1]
1
1
CDR–3
60
100
IOP3A
60
60
RPM
[2]
20
20
SIGA-UM, -MAB
[4]
2
17
17
Totals
Notes
[1] Add 0.75 mA for each energized LED.
[2] Add 0.7 mA for each output used.
[3]
This value includes RAI currents
[4] This represents the smoke power requirements. Only the
SIGA–UM or SIGA–MAB that signaled the alarm draws
alarm current. The remaining SIGA–UMs or SIGA–MABs
do not.
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