Page 2
© Bosch Security Systems
B.V.
, 2020
DS7461i Installation Guide
•
Remove the cover of the DS7461i. Press in and up with your thumb and nail directly above the lip of the DS7461i (refer to
Figure 1
).
Figure 1: Removing the Cover
•
Remove the DS7461i circuit board from the base. Press the circuit board retainer tab and pull the circuit board up and out of the base
(refer to
Figure 2
).
Wire
Entrance
Terminal Strip
Circuit Board
Retainer Tab
Reed Switch
Address
Switches
1 2 3 4 5 6 7 8
O
N
Tamper
Switch
Figure 2: Removing the PCB
Handle this and all circuit boards carefully. Hold the board by its edges.
•
Route the wiring through the wire entrance of the DS7461i base.
•
Mount the DS7461i base to the mounting surface using the supplied screws.
•
Return the DS7461i circuit board to the base.
5.0 Wiring
DS7461i Terminals
Description
Bus +
Positive Multiplex Input
Bus -
Negative Multiplex Input
1
Input Zone Positive Input
G
Input
Zone
Ground
Table 1: DS7461i Terminal Descriptions
•
Connect wiring to the DS7461i as shown in
Figure 3
and
Figure 4
.
•
Input zones are designed to monitor Normally Open or Normally Closed dry contacts. They are supervised using 47K ohm end-of-
line resistors.
The protection zone can be used as a magnetic contact by mounting a magnet iwith the reed switch and removing the EOL
resistor for the protection zone. The protection zone cannot be used as a magnetic contact and used to monitor other
contacts at the same time.
•
If the reed switch is not being used, cutting it from the DS7461i circuit board prevents possible tampering to override Zone 1
operation.
•
For fire installations, order Multiplex Fire Zone EOL P/N 28010 in the quantity needed.
The input zones are power limited and supervised.
When used in fire applications, Normally Open contacts must be used on the input zones.
