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Appendix A: Sensiscan 2000
Power Supply Connection
The LDMs may be powered by an MPS-24AF or an MPS-24BF. The power
run to the LDMs need not contain a Power Supervision Relay since loss of
power is inherently supervised.
MPS-24AF Main Power Supply
Connect the power run for the LDMs to MPS-24AF TB3, Terminals 1 (+)
and 2 (–). Maximum current is 1 amp.
Figure 21 MPS-24AF Power Supply Connections
MPS-24BF Main Power Supply
Connect the power run for the LDMs to MPS-24BF TB2, Terminals 1 (+)
and 2 (–). No more than 200 mA current can be drawn from these terminals
in standby or alarm.
To LDM-32F TB1
Figure 22 MPS-24BF Power Supply Connections
EIA-485 Connection
The EIA-485 bus that communicates with the LDM must be connected to the
CPU as illustrated below.
Note: The CPU must be Revision D or greater. (The revision level of the CPU is marked
on a label affixed to the upper board.)
34
To LDM-32F TB1
Power In (+)
BAT +
BAT -
TB2
Power In (+)
+24 VRESET
6 7 8
1
TB2
EIA-485
To TB2 In (–)
Sensiscan 2000 CPU
Figure 23 EIA-485 Connection to CPU
Power Supply Connection
To LDM-32F TB1
Common In (–)
POWER LIMITED
+24 R COMM ON
+24
COMMON
P3
To LDM-32F TB1
Common In (–)
COMMON
+24 VPOW ER
COMMON
BATT +
BATT -
TB3
1
2
2
3
4
EIA-485
To TB2 In (+)
P2
P5
P4
R27
P3
LDM-32F PN 50055:C 03/20/01
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