3.7.1.7.2 3-point with spring return with configurable spring return period
BF
Integrated auxiliary switch,
fuse on power supply side recommended
24...240 VAC/DC
~
~
–
+
PE
1
2
3
4
PA
5
6
7
8
9
10
< 5°
> 85°
U < 90 V AC/DC
U > 90 V AC/DC
2 A 10 A, slow
5 A 10 A, slow
min. max.
1
2
Ex i trip
circuit
for ExPro-TT-...
Safety
temperature
trigger
ExPro-TT
°C
Test
button
11
Spring return in ~ 10 s = default connection
Spring return in ~ 3 s = additional bridge to terminal 5
Fig.
39: SB7.1 - cable type 11+PE, cable diameter 9.9
mm
For explanation of the function of switches "a" and "b" see:
3.7.1.8
Versions -XX-TR
3.7.1.8.1 1-wire with spring return with configurable spring return period
TR
The voltage to auxiliary switches
must be identical to the supply
voltage and be protected with
the same fuse if services
are switched on.
Integrated, permanently installed
auxiliary switches, potential-free,
switching at 5° and 85° angle of
rotation
max. 24 V / 3 A – 250 V / 0.25 A
min. 5 V / 5 mA
Spring return in ~ 10 s
Button
1
2
3
4
5
6
7
8
1
2
°C
~
~
–
+
24...240 VAC/DC
For 1-wire
control,
the heating is
not active if
contact is
broken.
Caution!
ExPro-TT
Ex i circuit
for passive,
potential-free
safety
temperature
trigger
ExPro-TT-72
Fig.
40: SB7.5 - cable type 8+PE, cable diameter 8.8
mm
3 | Device description
Translation of the original installation guide · Version 1.0 · 2021-05-27
39