2
Operating instructions
Emergency stop command device
NDRR..., NDRZ...
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
resulting from the use of unauthorised spare parts or accessories.
For safety reasons, invasive work on the device as well as arbitrary
repairs, 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:
NDR
➀
50
➁➂➃➄
Operating element
No. Option
Description
➀
R
Latching (only in combination with EFR);
pull to unlock
Z
Latching (integrated in device head);
pull to unlock
➁
Colour of the bellows
Without
white
GR/
black
BL/
blue
➂
Device head colour
RT
red
➃
/XXX
Symbol code
➄
-2905-1
Front ring yellow plastic
in conjunction with the following contact elements and position switches:
EF
➀
…
Contact element
No. Option
Description
➀
303
1 NC / 1 NO
220
2 NC / 0 NO
Position switches
PS116-T...-...-S200
Position switches may only be used in connection with
emergency stop devices NDRZ.... The position switch must
have a slow action feature without contact overlapping and
S200 plunger.
For more information about contact elements, refer to chapter
4.2. Further information about position switches can be found
at www.schmersal.net.
and the following spring elements:
EFR.
➀
Spring element
No. Option
Description
➀
with securing plate for contact elements
1
without securing plate for contact elements
By observing the information described in this operating
instructions manual, the safety function and therefore the
compliance with the Machinery Directive will be 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 Purpose
The NDRR..., NDRZ... series emergency stop command devices are
designed for use in emergency stop circuits to ISO 13850.
2.4 Technical data
Device head:
Standards:
ISO 13850; IEC 60947-5-1;
IEC 60947-5-5; IEC 60947-1
Design:
Emergency stop pushbutton with latching for front plate
mounting
Unlocking type:
Draw unlocking
External snap-action mechanism:
depending on the version
Fully insulated:
Yes
Protection class IP:
IP69
Mechanical life:
100.000 operations
Switching frequency:
600 s/h
Actuating force:
approx. 25 N
Material:
- Operating unit material:
Plastic chromium-plated
- Front ring material:
Plastic chromium-plated
Colours
- Operating unit colour:
red
- Front ring colour:
silver
Dimensions:
- Height:
45 mm
- Diameter of control button:
50 mm
- Hole, diameter:
22.3 mm + 0.4 mm
- Shape:
Round
Fixation:
- NDRR...:
mounting flange ELM
- NDRZ...:
mounting flange EFM
Tightening torque for the fixing screws:
0.6 Nm
Front plate thickness:
- min. front plate thickness:
1 mm
- max. front plate thickness:
6 mm
Grid dimensions:
50 mm x 50 mm
Mounting position:
any
Ambient temperature:
−25° C … + 75° C
Contact element EF:
Standards:
IEC 60947-1; IEC 60947-5-1
Material:
- Material of the enclosure:
plastic, glass-fibre reinforced
thermoplastic, self-extinguishing
- Material of the contacts:
fine silver, spring bronze or brass carrier
Utilisation category:
AC-15: 250 V / 8 A; DC-13: 24 V / 5 A
Rated insulation voltage U
i
:
400 V
Rated impulse withstand voltage U
imp
:
4 kV
Degree of pollution:
3
Overvoltage category:
III
Suitable low voltage:
≥ 5 VDC / 3.2 mA
Thermal test current I
the
:
10 A
Max. fuse rating:
gG 10 A
Climatic resistance:
to EN 60068 Part 2-30
Ambient temperature:
−25 °C … +60 °C
Switch travel:
depending on the contact execution
Positive break travel:
2 mm
Test voltage enclosed:
2500 VAC
Actuating force at stroke end:
approx. 8 … 15 N
Switching frequency:
1200 s/h
Mechanical life:
10,000,000 operations
Bounce duration (100 mm/s):
< 5 ms
Resistance to shock:
110 g / 4 ms … 30 g / 18 ms, no bouncing
Shock resistance:
> 20 g / 10 … 200 Hz (for actuating heads with
higher mass accordingly lower)
Contact force:
0.5 N each contact point = 2 N each contact bridge