2
Operating instructions
Gear-switch and safety gear-switch
G50/150
G50-2047
EN
1.6 Warning about misuse
In case of improper use or manipulation of the safety switch-
gear, personal hazards or damages to machinery or plant
components cannot be excluded when safety switchgear is
used.
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:
G
➀
-
➁
-
➂➃➄
/
➂➃➄
/...Y-
➅
No. Option
Description
➀
50
Gear ratio ≤ 1:50
150
Gear ratio ≥ 1:50
➁
Gear ratio, refer to technical data
➂
M
Snap action M
Z
Snap action Z
A
T
Slow action T
A
➃
1 to 4
Number of NO contacts (max. 4)
➄
1 to 4
Number of NC contacts (max. 4)
➅
FL1
with FL1 connecting flange
1600-1
with adjustable pointed cam
1368-2
with Bowex coupling
1368-3
with shaft with tongue and groove
2047
for stages and studios
In accordance with the Machinery Directive, the type plate of
safety components is type plate is labelled "safety component".
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
Gear-switches are fit for multiple applications in hoisting technology,
materials handling, roller gate control etc. Depending on the contact
configuration, they are used for switching-off or positioning movement
cycles. They are geared by means of a shaft. The gear revolutions
are transmitted through a worm gear and if necessary other toothed
wheels. Adjustable cams transmit the actuator travel to the switching
elements.
Only type G 50 is admitted as safety gear-switch.
For positioning applications, the M 697-11-1 series microswitches can
be used. They have a switching hysteresis. These switches should be
used, when a mouvement cycle must be stopped immediately after the
switching point and no faulty switching due to vibrations or for instance
the rocking of the boom is admitted.
For emergency end stops, microswitches of the Z 6881-11-1 series
with positive break of the NC contact are available. Due to the constant
contact force, this element is extremely resistant to vibrations, even
right before the snap point. In order to ensure a safe switching of this
element in case of error, the actual switching point must be crossed to
such extent that a safe contact opening is obtained.
Slow action pushbuttons of the T 6881-11-1 and T 697-01-1 series,
also with positive break NC contact, are used when no hysteresis is
required. The switch-on and switch-off point are located at the same
position. In order to ensure a safe switching of this element, the actual
switching point must be crossed to such extent that a safe contact
opening is obtained. Contrary to the snap-action switches, the actuating
speed of slow-action pushbuttons must be relatively high depending
on the electrical load. The T 6881-11-1 switching element has an NC
contact and an NO contact, whereas the T 697-01 switching element
has only one NC contact. The switching elements are actuated through
normal pointed cams.
Depending on the version, the device can be equipped with 4 or 8
switching elements.
The optimal gearing takes place through a torsionally rigid elastic cou-
pling (e.g. ordering suffix- 1368-2) with axial and radial ejection forces.
Misalignments and offsets are aligned. When geared through chain
transmission, toothed belts, etc. the maximum shear force of 25 N must
not be exceeded.
2.4 Technical data
Standards:
IEC 60947-5-1, DGUV V 17/18
Enclosure:
light-alloy diecast
Cover:
thermoplastic polyester
Protection class:
IP65 to IEC 60529
Mounting position:
any
Switching point settings rough:
- Standard:
from 4° to 4° over 360° at the disc cam
- Front setting:
using the supplied slot screw-
driver from 3.4° to 3.4°
Switching point fine adjustment:
At the fixing screws of the switching
element max. 0.5 revolutions
Gear ratios:
- G50:
1:50, 1:35, 1:25, 1:17;
- G150:
1:150, 1:75, 1:100, 1:220, 1:300, 1:450
Number of switching elements:
Max. 8: M 697/T 697
Max. 4: for disc cam diameter 36 mm
G 50-050 and G 150-150: Z6881/T 6881
(otherwise additionally 1:1 ratio required)
Contact material:
Silver
Connection:
screw terminals
Rated impulse withstand voltage U
imp
:
4 kV
Rated insulation voltage U
i
:
250 V
Utilisation category:
AC-15
Rated operating current/voltage I
e
/U
e
:
- M/T 697:
4 A/230 VAC;
- Z/T 6881:
2.5 A/230 VAC
Max. fuse rating:
- M/T 697:
10 A slow blow, 16 A quick blow;
- Z/T 6881:
20 A slow blow, 25 A quick blow
Mechanical life:
- M/T 697:
3 x 10
6
operations;
- Z/T 6881:
6 x 10
6
operations
Ambient temperature:
−30 °C ... +80 °C
Weight:
Depending on the version 1.5 to 2 kg
