Installation Manual

411UDAC Document #51073 Rev. D 12/09/2008 P/N 51073:D 23
Input Channels
2.4 Input Channels
The 411UDAC has four channel inputs. Channel/input field wiring is supervised for opens (trouble), shorts (alarm)
and ground faults (zero ohms impedance between panel and earth ground) by the 411UDAC. All conditions are visu-
ally and audibly annunciated and, if programmed, communicated to a Central Station.
Each channel is a Style B (Class B) Initiating Device Circuit with the exception of channel/input 3 which can be con-
figured for Style B or Style D (Class A). All inputs can be connected to normally-open contact type devices. In addi-
tion, inputs 1 and 3 can be connected to conventional 2-wire smoke detectors. Refer to Figure 2-6, “Wiring Initiating
Device Circuits,” on page 24 for information on wiring Style B and Style D circuits.
The channel/inputs may be programmed as shown below:
A maximum of five waterflow devices may be used on any circuit programmed as a waterflow zone per NFPA 72.
It is allowable to mix an assortment of device types (i.e. smoke detectors, heat detectors, pull stations, etc.) on any
zone. This is not recommended, however, since specific and detailed reports will not be possible (particularly critical
when using Contact ID format). For example, the report of general fire alarm versus pull station fire alarm or smoke
detector fire alarm could not be distinguished.
• 2-wire smoke detector (inputs 1 & 3 only)
• Pull station
• Normally-open contact device
• Host panel trouble
• Supervisory
• Supervisory autoresettable
• Waterflow silenceable
• Waterflow nonsilenceable