D6412/D4412 Operation and Installation Guide
D6412/D4412
Page 29
© 2003 Bosch Security Systems
45349E
On-Board Sensor Loops
7.6
Doubled Point Configuration
When wiring the on-board sensor loops in the doubled point configuration, install the resistors of the appropriate value (2.2
k
Ω
and 3.65 k
Ω
) as shown in Figure 12.
Each loop is monitored
as a separate point.
3.65 K
Ω
2.2 K
Ω
L-2 to L-8
Common
Onboard Locations
10 to 16
(Point doubling not available for Sensor Loop 1)
Onboard Locations
2 to 8
Open for alarm
otherwise
Normally Closed
Open for alarm
otherwise
Normally Closed
Figure 12: On-Board Doubled Point Sensor Loop Wiring
7.7
Sensor Loop Response Time
The panel scans both on and off-board sensor loops per Point Index programming. See Point Index Configuration in the
D6412/D4412 Program Entry Guide (P/N: 45351).
The panel scans sensor loops for ‘pulses’ (electrically off normal events). The Point Index determines the Pulse Count and
Pulse Count Time for each sensor loop. If the panel sees enough pulses within an interval defined by the Pulse Count Time to
reach the Pulse Count, it puts the sensor loop in a faulted condition.
The panel scans the sensor loops at one of two scan rates as shown in Table 6.
Pulse Count Time Selections for 50 ms
Point Scan Time (on-board points only)
Pulse Count Time Selections for 160 ms
Point Scan Time (off-board points only)
Selection
Actual Pulse Count Time
Selection
Actual Pulse Count Time
0
0.5 sec.
8
20 sec.
1
1 sec.
9
30 sec.
2
2 sec.
10
40 sec.
3
3 sec.
11
50 sec.
4
4 sec.
12
60 sec.
5
5 sec.
13
90 sec.
6
10 sec.
14
120 sec.
7
15 sec.
15
200 sec.
Table 6: Point Scan Time/Pulse Count Time Selections
The scan rates for off-board sensor loops are determined by the point expansion modules they are associated with. The
panel scans modules with off-board points at the 150 ms scan rate.
Increasing the Pulse Count and Pulse Count Time may cause missed alarms. If you increase the Pulse Count and
Pulse Count Time, detection devices may go into alarm and reset without exceeding the Pulse Count or Pulse Count
Time.
Bosch Security Systems recommends using the default settings for Pulse Count and Pulse Count Time.
