2
Operating instructions
Safety foot switches
T.FH 232-..UEDR..
EN
1.7 Exclusion of liability
We shall accept no liability for damages and malfunctions resulting from de-
fective mounting or failure to comply with this operating instructions manual.
The manufacturer shall accept no liability for damages resulting from the use
of unauthorised spare parts or accessories.
For safety reasons, invasive work on the device as well as arbitrary re-
pairs, conversions and modifications to the device are strictly forbidden;
the manufacturer shall accept no liability for damages resulting from
such invasive work, arbitrary repairs, conversions and/or modifications
to the device.
2. Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
TFH 232-
➀
1-pedal safety foot switch
No.
Option
Description
➀
11UEDR
1 NO / 1 NC
22UEDR
2 NO / 2 NC
T2FH 232-
➀
2-pedal safety foot switch
No.
Option
Description
➀
11UEDR/11UEDR
2 NO / 2 NC
22UEDR/22UEDR 4 NO / 4 NC
11/22UEDR
3 NO / 3 NC
22UEDR/11
3 NO / 3 NC
Only if the information described in this operating instructions
manual are realised correctly, the safety function and therefore
the compliance with the Machinery Directive is maintained.
2.2 Special versions
For special versions, which are not listed in the order code below 2.1,
these specifications apply accordingly, provided that they correspond to
the standard version.
2.3 Destination and use
These robust safety foot switches are particularly suitable for industrial
applications. All safety foot switches are mounted with a shield to pro-
tect against unintentional operation. When the foot pedal is actuated
to as far as the pressure point, the NO contact is closed. If, in case
of danger, the pedal is actuated beyond the pressure point, then the
positive break NC contact is opened and mechanically latched.
The mechanical latching is realised through a slider and a spring, which
are mounted in an enclosure. The reset operation is carried out by
means of the blue pushbutton, which is located in the top of the cover.
This button pushes on the slider, which is returned to its original posi-
tion due to this action. The reset button is covered with a rubber cap,
which protects the inside of the foot switch enclosure against humidity
and soiling.
Design/Operating principle: overlapping contacts with pressure
point and latching (UEDR)
Representation
Condition
Function
0
0
1
0
0
0
21
13
22
14
21
13
22
14
21
13
22
14
21
13
22
14
A
A
A
A
Not actuated
No authorised
operation
Actuated up to
pressure point
Safety release
Pushed-through
No authorised
operation
Unlock
No authorised
operation*
* Switch-on impulse during the unlocking operation must be sup-
pressed by means of measures at control technology level.
For a single-channel connection, a jumper connection must
be fitted between the contacts (not included in delivery).
The non-safety-related pedal of the 2-pedal safety foot switch
does not have the overlapping and latching functions.
The user must evaluate and design the safety chain in
accordance with the relevant standards and the required
safety level.
The entire concept of the control system, in which the safety
component is integrated, must be validated to the relevant
standards.
