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18 en | Install the Bases F220 Series Detectors with F220-B6RS Bases
F.01U.029.847 | -01 | 2007.02 Installation Manual Bosch Security Systems, Inc.
* The F220-B6E base has a normally-open alarm loop relay that
activates when the unit is in alarm and a power supervision
relay that activates when power is supplied. Separate power
supervision devices, such as the D275, are unnecessary. Use
only one F220-B6E per zone run. It must be the last base on the
run.
1. Power input (positive [+]
in on terminal b2; negative
[-] in on terminal a1/a2)
from the control panel or
from a previous four-wire
base.
2. Initiating device circuit
(IDC) input (positive [+] to
terminal 2 and negative [-]
to terminal 1) from the
control panel or from a
previous four-wire base.
3. Jumper connecting
terminals 2 and 3.
4. Place an appropriate EOL
resistor (refer to the
control panel’s installation
instructions for resistor
specifications) across
Terminals 1 and 4.
5. Power Supervision Relay
6. Alarm Loop Relay
Fig. 3.4 Wiring F220-B6E Four-wire Power Supervision Bases
+
_
_
+
3
5
4
2
1
NO
C
NO
C
b1
b2
ca1/a2
F220-B6E*
1
6
5
3
4
2
F01U029847-01.book Page 18 Thursday, March 1, 2007 9:27 AM