CentraLine EAGLE - Appendix 2; Sensor Input Accuracy; Recognition of Sensor Failure of Sensor Inputs; Sensor Characteristics

EAGLE CONTROLLER – INSTALLATION & COMMISSIONING INSTRUCTIONS
39 EN1Z-0970GE51 R0918
APPENDIX 2
Sensor Input Accuracy
The internal sensor inputs of the EAGLE Controller support both NTC10kΩ and NTC20kΩ sensors (see also section "Universal
Inputs" on page 19). The following table lists the typical minimum accuracies of the hardware and software for temperature
sensors.
Table 30. Accuracies of internal NTC20kΩ sensor inputs of the EAGLE
range measurement error (excl. sensor characteristics)
NTC10kΩ sensors
(1
NTC20kΩ sensors
-50 … -20 °C (-58 … -4 °F) ≤ 5.0 K ≤ 5.0 K
-20 … 0 °C (-4 … +32 °F) ≤ 1.0 K ≤ 1.0 K
0 … 30 °C (32 … 86 °F) ≤ 0.5 K ≤ 0.3 K
30 … 70 °C (86 … 158 °F) ≤ 0.5 K ≤ 0.5 K
70 … 100 °C (158 … 212 °F) ≤ 1.0 K ≤ 1.0 K
100 … 130 °C (212 … 266 °F) -- ≤ 3.0 K
130 … 150 °C (266 … 302 °F) -- ≤ 5.5 K
150 … 400 °C (302 … 752 °F) -- --
(1
NTC10kΩ specified for -30 … +100 °C, only.
NOTE: This is the accuracy of the internal sensor input (hardware + software [linearization]), only. This table does not include
the characteristics of the sensors, themselves (see section "Sensor Characteristics" below). If a different sensor or
sensor accuracy is required, one may instead use the inputs of, e.g., a connected Panel I/O module.
Recognition of Sensor Failure of Sensor Inputs
The thresholds at which sensor failures – i.e., sensor breaks (SB) and short-circuits (SC) – are recognized depends upon the
given sensor type. In the event of a recognized sensor failure, the sensor inputs assume the safety values configured in CARE.
Table 31 lists the measurement ranges and the corresponding thresholds for the recognition of sensor failure for the various
different sensor types:
Table 31. Thresholds for short-circuit (SC) and sensor-break (SB) recognition
I/O configuration measurement range recognition thresholds
2…10 V 2…10 V / 4…20 mA (without pull-up) SC: < 1.5 V / 3 mA; SB: no recognition
NTC10kΩ -30 … +100 °C SC: < 20 Ω; SB: < -70 °C
NTC20kΩ -50 … +150 °C SC: < 20 Ω; SB: < -70 °C
NOTE: In the case of temperatures lying outside the aforementioned ranges, the lowest/highest value within the range,
instead, will be communicated. Thus a temperature of -51 °C will be communicated as "-50 °C."
Sensor Characteristics
The characteristics (resistance in relation to temperature) of the sensors and the resultant voltage are listed on the following
pages. The stated values do not include failures due to: sensor failures; wiring resistance or wiring failures; misreadings due to a
meter connected to measure resistance or voltage at the input.