3: Installing 2-Wire Smoke Detectors - Honeywell 6820 Manual

Control Panel Installation
Class A Inputs
You can connect conventional Class A switches, such as waterflow switches and pull stations, directly to the Flexput circuits of the control
panel.
To install a Class A switch:
1. Wire the Class A switch as shown in Figure 4.47.
2. Configure the circuit through programming (see Section Section 8.5).
NOTE: In programming any point that uses multiple Flexput circuits, the lowest Flexput circuit number is used to refer to the circuit pair. For
example, Figure 4.47 uses both Flexput circuit 5 and 6, so in programming it would be referred to as point 5.
4.17.3 Installing 2-Wire Smoke Detectors
Any compatible, UL-listed two-wire smoke detector can be used with the control panel. Refer to the Device Compatibility Document for a
list of devices. Figures 4.48 and 4.49 illustrate how to connect a UL-listed 2-wire detector to the control panel.
Installing 2-Wire Class B Smoke Detectors
To install a Class B two-wire smoke detector, wire as shown in Figure 4.48.
52
Figure 4.47 Class A Initiating Switches
Flexput Circuit 6 is used as an
example. Either Flexput circuit
can be used.
Figure 4.48 Two-Wire Class B Smoke Detector
Maximum Impedance
per circuit is 50Ω.
supervised,
power-limited
supervised,
power limited
EOL 4.7 kΩ
6820/EVS Manual — P/N LS10144-001SK-E:E 4/6/2022
Flexput I/O Circuits