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15
2.3.5.3 AUX DC Supply Output
Two Auxiliary Power Outputs are provided.
18.0
– 28.0 V DC, 0.5A
4
SUPERVISED. POWER
LIMITED.
AUX #1 : 4-Wire Smoke Detector Power or other
similar application. Power turns off for
4-5 seconds on reset and when EN54-
2 Clause 8.4 limit is reached.
AUX #2 : 24V DC (nominal) power output for
external equipment (remote status
indicators)
5
.
Use appropriately sized cable for the current load
to ensure device compatibility.
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AUX-2 AUX-1
2.3.5.4 Detection Zone Inputs
Section 12.5.2
In accordance with EN54-2, a maximum of 32 detectors per zone only.
Three conventional detection zone inputs are
provided. These are nominally 20V DC circuits
and are current limited.
The circuits are monitored for open and short
circuits. For normal monitoring, a 6800Ω End-of-
Line resistor is required. Maximum line
impedance 32Ω.
The circuit is designed to be compliant with
conventional detectors and call points with an
equivalent series resistance of 470Ω or 270Ω.
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If using devices that apply a short across the zone circuit, refer to Section 3.3.1 for how to configure this
use.
2.3.5.4.1 Standard Arrangement
6
Connect the detectors and manual call points (if
required) in series with no spurs.
Connect the end-of-line resistor across the
terminals of the last device.
OBSERVE POLARITY OF CONNECTIONS!
6800Ω
Zone-1 Zone-2 Zone-3
Detector
Detector
Call Point
2.3.5.4.2 Diode Base Arrangement
If the installation requires conformance to
BS5839-1: 2002 Code of Practice regarding the
supervision of removal of detectors and / or
operation of call points when detectors are
removed, then install the detectors using diode
bases.
An Active-End-of-Line device is required instead
of the 6800Ω resistor (Item Exp-006).
AEL
Zone-1 Zone-2 Zone-3
Detector
Detector
Call Point
4
TOTAL OUTPUT LOAD must not exceed panel supply rating
– maximum 2A.
5
AUX-2 also provides power for the Exp-008 8-Way Relay card. This current must be subtracted from the total available AUX-2 power to
give the available output power. If EN54-2 Clause 8.4 function is enabled then, to ensure that the minimum buzzer alert time of 1 hour is
maintained, AUX2 should not be used to power external equipment.
6
The system has been tested for compliance with the circuit impedance monitoring requirements of EN54-13 using the standard EOL
resistor. No EN54-13 compliance is declared for the use of an Active End-of-Line (EXP-006).
