User Manual Manual

3-47 Functions
Publication 825-UM001B-EN-P January 2001
Table 3.Z Sensor Measuring Circuit Specifications
➊ Twisted lead: 25 times twisted per m
Screened lead: Screen connected to T2
Function
Factory setting Off
Sensor Measuring Circuit
Max. resistance of the PTC chain when cold 1.5 kΩ
Max. number of sensors as per IEC 34-11-2 6
Pickup value at δ
A
= –5…+60 °C
3.3 kΩ ±0.3kΩ
Dropout value at δ
A
= –5…+60 °C
1.8 kΩ ±0.3kΩ
Delay on pickup 800 ms ± 200 ms
Pickup value when short-circuit in sensors circuit
at δ
A
= –5…+60 °C
≤ 15 Ω
Measuring voltage as per IEC 34-11-2 < 2.5V DC
Measuring Lead
Minimum cross-section [mm
2
]
[AWG No.]
0.5
20
0.75
18
1.0
17
1.5
16
2.5
14
Maximum length [m]
[ft]
200
656
300
984
400
1 312
600
1 968
1 000
3 280
Method of installation ➊ up to 100 m (328 ft) twisted, unscreened