Terminal Connections - Bosch F220 Series Installation Manual

F220 Series Detectors with F220-B6/C/E/R Bases
3.2 Wire the Bases
CAUTION! When wiring bases, all terminal screws
including those not wired must be tightened to prevent
!
loose screw heads from making intermitent electrical
contact with the detector head.
3.2.1

Terminal Connections

WARNING! Do not twist or loop the wires around the
terminals. In and out wires for terminal connection must
!
be cut, stripped, and inserted as individual ends.
NOTE! Bring the positive (+) wires in on terminal b2 and
i
out from terminal b1. Use a consistent pattern, inputting
on b2 and outputting from b1. The negative (-) wires
input and output from the same terminal (a1/a2).
3.2.2 EOL Resistors
Use the EOL resistors supplied or specified by the control panel
manufacturer. This applies to all loop terminations including the
D275 Module and the F220-B6E Power Supervision Base.
3.2.3 Loop Wiring Specifications
In a two-wire system, the maximum loop length depends on the
number of F220-B6 bases on the loop, the wire size, and the
control panel specifications. Refer to the control panel's
installation instructions for specific wiring information.
In a four-wire system, the maximum loop length and number of
bases that can be placed on a loop depend on the voltage drop
on the power circuit. Use standard voltage drop calculations to
ensure that the last detector on the loop meets the minimum
voltage requirement of at least 10 V.
Bosch Security Systems, Inc. Installation Manual
Install the Bases | en 11
4998138694 -04 | 2007.01