Chapter 5: Technical specifications
142 2X-A Series Installation Manual
[1]
2 supervised inputs, end-of-line resistor 15 kΩ, 1/4 W
60.2 Ω ≤ active value ≤ 8 kΩ (0.33 to 15 VDC)
value 10 kΩ ≤ value ≤ 20.2 kΩ (16.1 to 18.9 VDC)
≤ 60.2 Ω (less than 0.33 VDC)
-impedance fault value 8 kΩ < value < 10 kΩ (15 to 16.1 VDC)
≥ 20.2 kΩ (> 18.9 VDC)
See Table 55 on page 108
[1] All values based on 2.5 A max. at 24 VDC (Imax. a, system voltage).
Supervision (Class B outputs)
Reverse polarity, end-of-line resistor 15 kΩ, 1/4 W
Supervision (Class A outputs)
Reverse polarity, end-of-line resistor 4.7 kΩ, 1/4 W
Maximum output current [2]
750 mA per output at 25 ºC
600 mA per output at 40ºC (small cabinet)
675 mA per output at 40ºC (large cabinet)
Maximum electrical
characteristics for sounder
activation
1 A start-up current (t ≤ 2ms), load 100 µF
Output voltage range in open
circuit
−21 to −28 VDC
e in
−6.1 to −13.7 VDC
Output voltage range in
activation
21 to 28 VDC
Output voltage range in short
circuit
Less than −6.1 VDC
See Table 57 on page 111
[1] Depending on the current requirements, output cable length restrictions may apply
– see
Calculating the maximum output current as a function of the cable length” on page 143.
[2] Up to a maximum system consumption of
Imax b (see “Power supply specifications” on page
Fire and fault outputs [1]
1 output pair for Fire
1 output pair for Fault (activated when no fault)
Output pair specifications
1 supervised output: reverse polarity, end-of-line resistor 15 kΩ,
1/4 W
1 potential free relay: C/NO/NC
Maximum output current [2]
Supervised output
Relay output
350 mA per output for all temperature ranges
2 A / 30 VDC
Output voltage range in open
circuit
−21 to −28 VDC
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