16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
0
250
500
750
1000
1250
1500
Input voltage U [V]
L
o
a
d
r
e
s
ist
a
nc
e
R
[
Ω
]
Permitted range up to 80 °C
Additional permitted range up to 65 °C
Figure 24: Permissible load resistances TMx88B
7.4.3
Load resistance TMx55E
In the figure (
), the permissible load resistance based on the input voltage
for the operating range up to 80 °C is shown in blue. Within a restricted operating
range up to 65 °C, combinations of input voltage and load resistance from the area
shown in gray are also permitted.
NOTE
For safety reasons, the sensor has an internal temperature shutdown feature. This
switches off both of the sensor outputs as soon as the temperature in the sensor
reaches a critical point because power loss is too high. Once the sensor has cooled
down, both outputs switch back on automatically. If the cause of the increased power
loss (usually an impermissible combination of supply voltage and load resistance) is not
removed, the outputs will shut down again a short time later.
Table 15: Minimum, typical, and maximum load resistances TMx55E
U
dd
[V]
R
L
min. [
Ω
] @ Ta
max
=
65 °C
R
L
min. [
Ω
] @ Ta
max
=
80 °C
R
L
max. [
Ω
]
11
0
150
290
12
0
200
330
24
600
800
930
30
900
1100
1230
7
CONNECTION
26
O P E R A T I N G I N S T R U C T I O N S | TMS/TMM88, TMS/TMM55
8019053/1EF6/2021-12-13 | SICK
Subject to change without notice
