Original assembly/operating instructions Gear limit switch Type series 51 • No. 151-00004 H • 01.2018
28
Design: U
B
12 − 36 V AC/DC
110 − 250 V AC/DC
Heat Output
ca. 2.5 Watts
ca. 4 Watts
PTC Cooling resistor (at 25 °C)
R
25 =
20 Ω ± 35 %
R
25 =
1500 Ω ± 35 %
PTC Reference temperature
50 °C
50 °C
Protection class (VDE 0100, 0160)
II
II
Connecting cable
2 x 0,25 mm
2
, Silicon cable
2 x 0,25 mm
2
, Silicon cable
Radiator
Anodised aluminium
Anodised aluminium
Weight
approx. 40 g
approx. 40 g
5.3.5
Ausführung mit Heizwiderstand
A
PTC heating
B
View of PTC heating
1
PTC heating group
C
Circuit diagram
2
Connecting terminal
To avoid water condensation, a heating resistor can be mounted in the switch room. This heating is designed so
that a heat output of approx. 2.5 Watts or 4 Watts is available, depending on the voltage.
The electrical connection is (U
B
) 12 − 36 V AC/DC (max. 1,5 A AC/DC) or 110 − 250 V AC/DC (max. 4 A AC/ DC).
The PTC heating is self-regulating and temperature-limiting, and thus leads to an automatic adjustment to the
ambient temperature. The connection is via a 2-pole terminal block.
ATTENTION
Risk of accidents due to hot surfaces
The surface of the heating can exceed 60 °C.
Always allow components to cool down first.
Specific technical values
Fig. 12
