2
Operating instructions
Safety foot switches
TFH 232 AS
EN
1.7 Exclusion of liability
We shall accept no liability for damages and malfunctions resulting from
defective mounting or failure to comply with this operating instructions
manual The manufacturer shall accept no liability for damages result-
ing 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
-AS
➁➂➃
No. Option
Description
➀
ST
Connector plug M 12
➁
UE
Overlapping contacts
➂
D
with pressure point
➃
R
with latching
Only if the information described in this operating instruc-
tions 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 21,
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 indus-
trial applications All safety foot switches are mounted with a shield to
protect 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 posi-
tive break NC contact is opened and mechanically latched
All safety foot switches are mounted with a shield to protect against un-
intentional operation When the foot pedal is actuated to as far as pres-
sure 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 by means of a locking device and
a spring in the housing Reset operation is carried out by means of the
blue push button located on the topside of the enclosure This button
pushes the locking device back to its original position The unlocking
button is equipped with a rubber cap, protecting the inner compartment
of the foot switch enclosure against moisture and dirt
Design/operating principle
The following functionality is not set in the TFH 232 AS safety foot switch:
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
An AS-Interface Safety at Work component functions on the basis of an
individual code generator (8 x 4 bit) This safety code is cyclically trans-
mitted over the AS-i network and monitored by the ASM safety monitor
The component status can be evaluated through a PLC with AS-Inter-
face master The safety-related functions are enabled by means of the
AS-i safety monitor
The user must evaluate and design the safety chain in
accordance with the relevant standards and the required
safety level
2.4 Technical data
General data
Standards:
EN 50295, EN 60947-5-1, EN 60947-5-5,
IEC 61508, EN ISO 13849-1
Operating principle:
electromechanical
Material Enclosure/cap/cover:
Aluminium die-cast
Enclosure coating:
powder-coated thermoplastic
Material of the pedal:
Plastic, glass-fibre reinforced
thermoplastic, self-extinguishing
Response time:
< 100 ms
Mechanical data
Switching principle:
slow action, 1 NO and 1 NC, positive break
A
Execution of the electrical connection:
M12 connector plug, 5 poles
Mechanical life:
> 200,000 operations
Switching frequency:
max 1/s
Resistance to shock:
30 g / 11 ms
Resistance to vibration:
10 … 150 Hz (035 mm / 5 g)
Ambient conditions
Ambient temperature:
-25° C +60° C
Storage and transport temperature:
-25 °C … +85 °C
Relative humidity:
30 % … 95%, no condensation, no icing
Protection class:
IP65
Insulation values to IEC/EN 60664-1:
Rated impulse withstand voltage Uimp:
08 kV
Rated insulation voltage U
i
:
32 VDC
Overvoltage category:
III
Degree of pollution:
3
Electrical data - AS-Interface
AS-i supply voltage:
18,0 31,6 VDC, protection against
polarity reversal (stabilised PELV units)
AS-I power consumption:
≤ 0,05 A
AS-i Device insulation:
internal short-circuit proof
AS-i specification:
Safety-Slave
Version:
V 30
Profile:
S-0BFF
AS-i inputs:
- Channel 1:
Data bits DI 0/DI 1 = dynamic code transmission
- Channel 2:
Data bits DI 2/DI 3 = dynamic code transmission
