Specifications

AS-Interface
ASIsafe — SIMATIC FS400 light curtains and light grids
3SF78 44 ASIsafe series
internal evaluation, Type 4
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Siemens IK PI · 2009
6
■ Technical specifications
Receiver/transceiver machine interface, ASIsafe
Type 3SF78 44
Safety category to EN,
IEC 61496-1, -2
Type 4
Protective field height
• for 14 and 30 mm resolution 150 ... 1800 mm
• for 50 mm resolution
450 ... 3000 mm
Protective field width, range
• for 14 mm resolution 0 ... 6 m
• for 30 and 50 mm resolution
0 ... 18 m
Detection capability (resolution)
14 mm, 30 mm, 50 mm
Supply voltage
(emitter and receiver)
24 V DC ± 20 %
(external power pack with safe
isolation and compensation of
20 ms voltage dip is necessary)
Residual ripple
< 5%
Current consumption
• Emitter 75 mA
• Receiver
160 mA (without external load)
General value for external fuse
in the transmitter and receiver
supply leads
4 A
Wave length
880 nm (infrared)
Synchronization
Optically between emitter and
receiver
Ambient temperature
• Operation 0 ... +50 °C
• Storage
–25 ... +70 °C
Relative humidity
15 ... 95%
Degree of protection
IP65
Safety class to DIN VDE 0106
III
Vibration resistance
5 g, 10 ... 55 Hz to
IEC/EN 60068-2-6
Shock resistance
10 g, 16 ms in accordance with
IEC/EN 60068-2-29
Signal inputs and outputs (local socket, optional)
Signal inputs
• Restart inhibit unlocking 1 button with 1 NO contact
(floating)
- min. switching time
300 ms
- max. switching time
4 sec
• Teach-in
2-pole key-operated switch
(selector switch) (floating)
- -simultaneity
< 500 ms
Voltage output (for command
devices or safety sensors only)
24 V DC ± 20 %, max 0.5 A
OSSDs safety
switching outputs
4 bit AS-i data
Minimum Typical Maximum
Permissible cable length
- - 100 m
Restart time after beam interruption
- 140 ms -
Slave address area
1 - 31
Slave address area (WE)
0 (ex works
ID code/IO code emitter
-
ID code receiver
B
IO code receiver
0
AS-i profile
Secure slave
Cycle time according to
AS-i specification
5 ms
OSSD response time
Beam number dependent,
see operating instructions
Additional AS-i system
response time
40 ms