schmersal NDRR Series Operating Instructions Manual Download Page 3

3

NDRR..., NDRZ...

Operating instructions

Emergency stop command device

EN

Wiring configuration:

 

to IEC 60947-1

Termination: 

 

screw connection,  

flat plug-in connector,  

 

Cage-Clamp connection 

(in case of a Cage Clamp connection, the contact 

elements can not be additionally secured against loosening)

Tightening torque for the connecting screw: 

 

max. 1 Nm

Cable sections:

 

 

- Single-strand:

 

2 x (0.5 … 2.5 mm²)

 

- Multi-strand:

 

2 x (0.5 … 1.5 mm²)

 

- Flat plug-in connector:

 

6.3 mm x 0.8 mm / 2 x 2.8mm x 0.8 mm

Protection class: 

 

- Terminals:

 

IP20 (finger guard) 

- Wiring compartments:

  

IP40  

(with plug-in connector depending on the connector plug used)

Approvals: 

 

cULus (save cage clamp connection)

The technical data for the PS116 position switch are provided 

in the operating instructions of the position switch.

2.5  Safety classification

Standards:

 

ISO 13849-1

B

10D

 (NC contact):

 100,000

Service life:

 

20 years

MTTF

B

d x

x

h

s/h

3600

D

10D

op

op

op

n

0,1 x n

op

t

cycle

(Specifications can vary depending on the application-specific 

parameters hop, dop and tcycle as well as the load.)

3.  Mounting

3.1  General mounting instructions

1.  Fit the emergency stop actuator in non-actuated condition by means 

of the ELM mounting flange, align and tighten (max. 0.6 Nm)

2.  Snap the EFR.1 or EFR spring elements in the middle position of the 

ELM mounting flange (position 3).

3.  The EMERGENCY STOP actuator is latched (i.e. mechanically fixed) 

to the EFR 1 or EFR spring element by actuation. Unlatching by pulling 

on the EMERGENCY STOP actuator retentions the spring element 

and the EMERGENCY STOP is brought back to the ready position. 

4.  Snap the desired EF... contact elements onto the free positions to 

the right and to the left (position 1 and 2) next to the EFR.1 or EFR 

spring element.

5.  Mounting of the securing plate with the EFR (not required with the EFR.1):

Installation of EFR discontinued for NDRZ... emergency 

stop devices. Instead of the ELM mounting flange, the EFM 

mounting flange is installed here. The relevant mounting 

flange is included in the items supplied with the device head. 

If using NDRZ... emergency stop devices with the PS116 

position switch, the supplied EFM mounting flange must be 

replaced with the EFMH mounting flange.

For position switch combinations, secure the position switch 

to the EFMH mounting flange using the supplied screws and 

tighten to a torque of 0.8 Nm. The washers are not required 

for the PS116 position switch and have been left out.

The pre-mounted assembly group from EFMH and the 

position switches are now mounted on the emergency stop 

control panel in an unactuated state, aligned and screwed 

tightly (max. 0.6 Nm). 

3.2  Dimensions

All measurements in mm.

Emergency stop command device NDRR..., NDRZ...

a)

b)

c)

d)

e)

f)

Ø 44,5

7

36

a )  

Emergency stop actuator

b )  

Front plate

c )   

Mounting flange ELM

d )  

Contact element EF

e )  

EFR or EFR.1

f )   

The EFR kit (not required with the EFR.1)

EFR with securing plate

a)

c)

b)

d)

d)

b)

a )  EFR (spring element with securing plate)

b )  Retaining bolts (not required with the EFR.1)

c)   Securing plate

d)   2x Securing ring

Contact elements of the EF contact system must be fitted in 

the second locking position and must, therefore, lie flush on 

the mounting flange after fitting.

 Contact element EF… 

in fitted condition

46

60

52

10
a)

10

52

10

10

a) Maximum number of contacts (2 contact elements, max. 4 contacts)

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