Controls Product Division
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
Siemens
SIGUARD®
Light Curtains
Safety Integrated
Controls Product Division
SIGUARD 3RG7842
Category 4 series
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Certification acc. to EN61946-1/2
Resolution 14, 30, 50, 90mm
Heights of 150mm to 3000mm
Max. distance 0.3m-18m
Host-Guest combination
Safety Evaluation units:
Safety Relays
for Light Curtains
Muting
- standard
- muting
- PSDI (Presence Sensing Device Initiate)
 Multiscan
 Competitive price structure
Safety Integrated
Controls Product Division
3RG7842 Category 4 acc. to EN 60954-1
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Resolution / Range / Protection Height
14mm
Resolution
6m Range
5.91"
150mm
8.86"
225mm
11.81"
300mm
17.72"
450mm
23.62"
600mm
29.53"
750mm
35.43"
900mm
41.34"
1050mm
47.24"
1200mm
53.15"
1350mm
59.06"
1500mm
64.96"
1650mm
70.87"
1800mm
5.91"
150mm
8.86"
225mm
11.81"
300mm
17.72"
450mm
23.62"
600mm
29.53"
750mm
35.43"
900mm
41.34"
1050mm
47.24"
1200mm
53.15"
1350mm
59.06"
1500mm
64.96"
1650mm
70.87"
1800mm
17.72"
450mm
23.62"
600mm
29.53"
750mm
35.43"
900mm
41.34"
1050mm
47.24"
1200mm
53.15"
1350mm
59.06"
1500mm
64.96"
1650mm
70.87"
1800mm
82.68"
2100mm
94.49"
2400mm
106.30" 118.11"
2700mm 3000mm
29.53"
750mm
35.43"
900mm
41.34"
1050mm
47.24"
1200mm
53.15"
1350mm
59.06"
1500mm
64.96"
1650mm
70.87"
1800mm
82.68"
2100mm
94.49"
2400mm
106.30" 118.11"
2700mm 3000mm
Muting
30mm
Resolution
18m Range
50mm
Resolution
18m Range
90mm
Resolution
18m Range
Safety Integrated
Controls Product Division
SIGUARD Light Curtains and Light Grids
Applications Type 4
Safety Integrated
Light Curtains
 Mechanical and hydraulic presses
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
 Edging presses
 Punch Presses
Muting
 Production lines and automatic production machines
 Robotic cells
 Perimeter Guarding
 And all additional applications which require a risk evaluation,
Safety Category 4
Safety Integrated
Controls Product Division
SIGUARD 3RG7842
Diagnostics display on the transmitter + receiver
Safety Integrated
Light Curtains
a) System status
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
b) Decimal point: Test active
c) Multiple evaluation active
Muting
d) LED red:
OSSD outputs off
e) LED green:
OSSD outputs on
f) LED orange:
Weak signal reception
g) Not assigned
Safety Integrated
Controls Product Division
3RG7842 SIGUARD
Technical Data
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
Safety Integrated
Controls Product Division
Two different transmission channels
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
 When required two transmission channels can be
selected
Safety Relays
for Light Curtains
 Light curtains can be arranged as required
Muting
 They do not mutually influence one another
Safety Integrated
Controls Product Division
SIGUARD 3RG784
Cascading Host Guest-Combinations
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
 Simultaneous protection in
the horizontal & vertical planes
 Safety outputs at the Host,
i.e. only one evaluation is
required
 No bulky Evaluation box
required, just a safety relay
 Maximum total length,
240 light beams
 Host / Guest / Guest
arrangements also available
 300m (11.81“) cable between
Host and Guest
 Available in all series of cat.
2 and cat. 4
Safety Integrated
Controls Product Division
SIGUARD 3RG7842
Mounting system
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Standard holding bracket
(shipped with light curtain)
Safety Relays
for Light Curtains
Muting
Swiveling holder with
oscillation damping (this must
be separately ordered)
Safety Integrated
Controls Product Division
SIGUARD 3RG784
Accessories
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
Mounting
holders
Mounting
columns
Safety Integrated
Deflection mirrors and
deflection mirror columns
Laser aligning
tools
Controls Product Division
Visualization and Diagnostics via PC
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
 Visualization
 Diagnostics
 Signal tracing
 Alignment aid (this is especially used for high protection zones
and Host / Guest combinations)
Safety Integrated
Controls Product Division
Light Curtain Evaluation Units
For 3RG7841 and 3RG7842
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
Safety Integrated
Controls Product Division
Safety Relay Circuit Examples
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
Basic Light Curtain Safety Relay
Safety Integrated
Controls Product Division
Safety Relay Circuit Examples
Now with Electronic Safety Relays for DC circuit switching
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
Basic Light Curtain Safety Relay options now offered
by new 3TK2841 series with 2 Amp max breaking capacity.
Safety Integrated
Controls Product Division
Safety Relay Circuit Examples
Now with Electronic Safety Relays for DC circuit switching
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
Basic Light Curtain Safety Relay options now offered
by new 3TK2842 series with 2 Amp max breaking capacity.
Safety Integrated
Controls Product Division
Safety Relay Circuit Examples
Now with Safety Relay Contactor Combinations for DC circuit switching
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
Light Curtain Safety Relay now offered with Redundant Contactor
structure (3TK2850 series) with breaking capacities of 6A (AC-15) and
10A (DC-13). Unit saves panel space and wiring costs.
Safety Integrated
Controls Product Division
Safety Relay Circuit Examples
For PSDI Applications
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
PSDI (Presence Sensing Device Initiate)
Safety Integrated
Controls Product Division
Safety Relay Circuit Examples
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
Safety Integrated
Controls Product Division
SIMATIC ET 200eco
Fail-safe Inputs
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
ET 200eco
For distributed connection
of Light Curtains via PROFIsafe
Muting
Digital
Inputs
For connecting digital sensors /
encoders

4/8 F-DI
Safety Integrated
8 Inputs (SIL2/Cat. 3)
or 4 Inputs (SIL3/Cat.4)
DC 24V  Internal Sensor supply
 Protection class IP65/67
 Two connection systems
M12, 7/8“, Ecofast
Controls Product Division
SIGUARD 3RG7847-4BF
Muting Relay Unit
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
• Safety-Interface Typ 4
acc. to IEC-, EN 61496-1
and EN 954-1 Category 4
• 2 or 4 Sensor Muting w/ testable
or non-testable Muting-sensors
• Proximity Sensors, Lightbeams
or Limit Switches as Muting-Sensors
• 2 monitored Muting lamps,
Output Signal for failure indication
• Various signaling contacts
• RS 232 Diagnosis Interface for on-site
diagnosis
Safety Integrated
Controls Product Division
SIGUARD Light Curtains
Muting application
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
Safety Integrated
Controls Product Division
SIGUARD Light Curtains
Parallel Muting
Safety Integrated
Light Curtains
Start
Light Curtains
3RG7842 (cat.4)
M2
Safety Relays
for Light Curtains
E
Dangerous
area
Muting
S
M3
M2
<2.5 s
M3
<2.5 s
<2.5 s
Muting
50 ms Ansprechzeit
Safety Integrated
Controls Product Division
New Literature
3RG7841 and 3RG7842
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
Banta order #
SEBR-20051-1104
Safety Integrated
Controls Product Division
SIGUARD® Light Curtains
are used throughout industries worldwide
Safety Integrated
Light Curtains
Light Curtains
3RG7842 (cat.4)
Safety Relays
for Light Curtains
Muting
Safety Integrated