3
Product and functional description
18
09.2019
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3.7.4
Operating time counter
The operating time counter integrated in SLE counts the total number of hours of
operation in which the hoist motor is actuated.
3.7.5
Temperature monitoring for hoist and travel motors
Thermistor input
1
The temperature of the hoist motor is monitored by default. When the motor thermistor
(input
1
) is actuated, an error is indicated by the device LEDs and all lifting movements
(outputs
K↓
,
K↓↓
and
K↑
,
K↑↑
,) are blocked.
The load can only be moved again after cooling of the hoist motor.
Thermistor input
2
The travel motor thermistor (PTC) is connected to input
2
(if two or more travel motors,
for all). When a travel motor thermistor responds, the
SLE 3
switches the relay outputs
left/right
off and reports this via the device LED (as warning) that the travel motor(s) can
no longer be actuated.
When the motor has cooled down, the error is acknowledged automatically by the
SLE 3
and
left/right
is switched on again.
•
All thermistors must correspond to the specifications of DIN 44080.
•
All thermistors can be replaced with resistors of ~300
Ω
if the motors used do not
have thermistors.
ATTENTION:
The hoist or cross travel motor is then no longer protected against
overheating.
Please observe the chapter "Technical data"!
If there is no thermistor connected to
2
, the warning signal can be suppressed by
switching the slide switch
S3_2
on.
The relay outputs
left/right
are switched irrespective of this.
