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Operating Instructions
SNS 4074K
SNS 4084K
Zero-speed monitor
7
SAF ET Y R EGULAT IO NS
The installation, commissioning, modification and retrofit-
ting must only be performed by a qualified electrician.
Disconnect the device / the system from the power supply
before starting work. In the case of installation and system
errors, mains voltage can be present on the control circuit in
the case of non-galvanically isolated devices.
Observe the electrotechnical and professional trade associa-
tion safety regulations for the installation of the equipment.
Opening the case or other manipulation voids any warranty.
In the case of improper use or any use other than for the
intended purpose, the device must no longer be used and
any warranty claim is void. Invalidating causes can be:
strong mechanical loading of the device such as, e.g. in
the case of falling or voltages, currents, temperatures, hu-
midity outside the specification.
Always check all safety functions in accordance with the
applicable regulations during initial commissioning of your
machine / system and observe the specified inspection
cycles for safety devices.
Take the following safety precautions before starting
installation / assembly or dismantling:
1. Disconnect the device / the system from the power sup-
ply before starting work.
2. Secure the machine / system against being switched on
again.
3. Confirm that no voltage is present.
4. Ground the phases and short to ground briefly.
5. Cover and shield neighbouring live parts.
Limited contact protection!
Protection class according to EN 60529.
Case / terminals: IP 40 / IP 20.
Finger-proof according to EN 50274.
Proper Use
The units must only be used as components of safety devices
on machines intended to protect persons, material and ma-
chines.
Doc. # BA000624 – 04/2012 (Rev. D)
(translation of the original instructions)
Zero-speed monitor
Application up to SIL 3 according to EN 61508, EN 62061 or PL e / Category 4 according to EN
ISO 13849-1
Manual or automatic reset
Eight safe inputs and four safe semiconductor outputs
2 kHz cutoff frequency
Adjustable standstill frequency
0.1 Hz...9.9 Hz (0.1 Hz steps) and 0.5 Hz ...99 Hz (1 Hz steps)
Sensors:
Proximity switches with PNP-output (plus switching)
Incremental encoder with HTL-output
Device versions
SNS 4074K-A
0.1–9.9 Hz
SNS 4074K-C
0.1–9.9 Hz
SNS 4074K-A
0.5–99 Hz
SNS 4074K-C
0.5–99 Hz
...-A: with screw terminals, pluggable; ...-C: with spring-loaded terminals, pluggable
Further Documentation
For the planning, commissioning and operation of the device, please observe the information in the
documentation "Manual SNS 4084K/4074K Standstill Monitor" (Doc. No.: BA000506).
ATT ENTION
R1.188.3620.0
SNS 4084K-A
R1.188.3630.0
SNS 4084K-C
R1.188.3640.0
SNS 4084K-A
R1.188.3650.0
SNS 4084K-C
Only use the unit in accordance with its intended purpose. Also,
pay particular attention to the information in the technical data.
The frequencies present at the inputs I1, I2, I3 and
I4 must not exceed 2 kHz (cutoff frequency).
The SIL according to EN 61508 / EN 62061 or PL / Category
according to EN ISO 13849-1 depending on the external
wiring, the choice of control devices and their location on
the machine.
In applications with a low demand of the safety function, a
proof-test once a year has to be implemented (The supply
voltage of the device has to be switched off and on again
and the safety function of the device has to be activated to
verify the safety function).
The device must be protected with a fuse 4 A Operating
Class gG or a circuit breaker 4 A Tripping Characteristics B
or C.
Installation (see also "Assembly")
The devices must be installed in a switch cabinet with a
protection class of at least IP 54.
The installation is made on a mounting rail
according to EN 50022-35.
The mounting rail must be connected to protective earth
(PE).
The external power supply must comply with the regulations
for low voltages with safe separation (SELV, PELV according
to IEC 60536) and EN 50178 (Electrical equipment for use in
power installations).
External loads must be equipped with a suitable protection
circuit for the load (e.g. RC elements, varistors, suppressors)
in order to reduce electromagnetic interference and to in-
crease the service life of the output switching elements.
Functional Description
In the SNS 4084K/4074K there are four operating mode
groups A, B, C, D available for safe speed monitoring tasks (see
manual):
Zero-speed monitoring (A, B)
Diverse zero-speed monitoring (C, D) with PLC-signal
SNS 4074K/4084K
0.1–9.9 Hz
R1.188.3660.0
0.1–9.9 Hz
R1.188.3670.0
0.5–99 Hz
R1.188.3480.0
0.5–99 Hz
R1.188.3490.0
NOTE
NOTE
EN 6
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