ELECTRICAL CONNECTIONS
28
SH4 BASE-STANDARD
Notes on connections
For the correct operation of the safety light curtains, the following precautions regard
-
ing the electrical connections have to be respected:
• Do not place connection cables in contact with or near high-voltage cables and/or
cable undergoing high current variations (e.g. motor power supplies, inverters,
etc.);
•
Do not connect the OSSD wires of different light curtains in the same multi-pole
cable
.
- The TEST wire must be connected through a N.O. button to the supply volt
-
age of the ESPE.
• The device is already equipped with internal over-voltage and over-current sup
-
pression devices.
• The use of other external components is not recommended.
Example: connection to the safety relay SE-SR2
Figure 2: Connection to SE-SR2 Safety Relays
The figure shows the connection between the safety light curtains and the safety relay
of the SE-SR2 series functioning in the Automatic Restart mode (left side) and Manual
Restart with monitoring (right side).
Do not use varistors, RC circuits or LEDs in parallel at relay inputs or in series at OSSD
outputs.
• The OSSD1 and OSSD2 safety contacts cannot be connected in series or in parallel,
but can be used separately, conforming to the plant’s safety requirements.
• If one of these configurations is erroneously used, the device enters the output
failure condition (see chapter “User Interface Dialogue”).
• Connect both OSSDs to the device to control.
CAUTION: The TEST button must be located in such a way that the operator
can check the protected area during any test.
The RESET/RESTART/ALIGN button must be located in such a way that the
operator can check the protected area during any reset operation.
A1
S52
S34
S12
A2
S12
SE-SR2
POWER
CH.1
CH.2
A1 13
23 33
P1
S52 S34 41 42
P2
P2
P1
S11 S12 Y36 Y37
A2 14
24 34
13 23 33 41
14 24 34 42
A1
S52
S34
S12
A2
SE-SR2
POWER
CH.1
CH.2
A1 13
23 33
P1
S52 S34 41 42
P2
P2
P1
S12 Y36 Y37
A2 14
24 34
13 23 33 41
14 24 34 42
Y36/Y37
S12
S11
24Vdc
0Vdc
24Vdc
0Vdc
Automatic
Restart
Monitored
Start
OSSD1 OSSD2
OSSD1 OSSD2
Summary of Contents for SH4 BASE-STANDARD
Page 1: ...SH4 BASE STANDARD PRODUCT REFERENCE GUIDE Safety Light Curtains...
Page 6: ...CONTENTS vi SH4 BASE STANDARD...
Page 13: ...COMPLIANCE PRODUCT REFERENCE GUIDE 5...
Page 29: ...GENERAL INFORMATION ON DEVICE POSITIONING PRODUCT REFERENCE GUIDE 21...
Page 33: ...PRODUCT REFERENCE GUIDE 25...
Page 38: ...ELECTRICAL CONNECTIONS 30 SH4 BASE STANDARD...
Page 59: ...SH4 X XXXX X X MODELS PRODUCT REFERENCE GUIDE 51...
Page 65: ...PRODUCT REFERENCE GUIDE 57...
Page 69: ...RESPONSE TIMES PRODUCT REFERENCE GUIDE 61...
Page 73: ...SH4 2 3 4 XXXX X X PRODUCT REFERENCE GUIDE 65...
Page 75: ...METAL ANGLED FIXING BRACKET PRODUCT REFERENCE GUIDE 67...
