4
Operating instructions
Emergency stop command device
NDRR..., NDRZ...
EN
4. Electrical connection
4.1 Important notes
The electrical connection may only be carried out by
authorised personnel in a de-energised condition.
At least one contact with positive break must be integrated
in the safety circuit.
After wiring, the contact elements must be cleaned
(i.e. remove excess cables etc.).
The fixing screws of the contact element must be tightened
with 0.8 Nm tightening torque.
4.2 Contact variants
The following contact variants can be combined together:
Screw or plug-in terminals:
- 1 x EF303 (1 NC / 1 NO) + 1x EF220 (2 NC) or
- 2 x EF303 (1 NC / 1 NO each contact element) or
- 2 x EF220 (2 NC each contact element)
EFK cage clamp: contact data upon request
EF 220.1
EF 220.2
EF 220.3
11
21
12
22
31
41
32
42
51
61
52
62
EF 303.1
EF 303.2
EF 303.3
11
23
12
24
31
43
32
44
51
63
52
64
4.3 Switch travel
EF 220.1
EF 220.2
EF 220.3
EF 303.1
EF 303.2
EF 303.3
6
0
2
6
0
3
3
See the operating instructions of the position switch for the
contact variants and switch travel for position switch PS116.
5. Set-up and maintenance
5.1 Functional testing
The safety function of the safety components must be tested.
The following conditions must be checked and met:
• Correct fixing of the fitted component
• Check the integrity of the cable entry and connections
• Check the emergency stop command device for damage
5.2 Maintenance
A regular visual inspection and functional test, including the following
steps, is recommended:
• Check the correct fixing of the emergency stop command device and
the contact element
• Remove particles of dust and soiling.
• Check cable entry and connections.
Damaged or defective components must be replaced.
6. Disassembly and disposal
6.1 Disassembly
The safety switchgear must be disassembled in a de-energised
condition only.
• Disassembly of the EF... contact element(s).
• Actuate/snap in EDR emergency stop actuator
• Spread the spring (A) between the NDRR actuator plunger
and the EFR spring element by means of a screwdriver (B) or similar
(refer to drawing). The actuator jumps back into basic position.
• Snap off the EFR spring element, disassembly the actuating
head if necessary.
B
6.2 Disposal
The safety switchgear must be disposed of in an appropriate manner in
accordance with the national prescriptions and legislations.