9
OMRON SCIENTIFIC TECHNOLOGIES INC.
Fremont CA USA
Tel: 1/888/510-4357 in USA and Canada
© OSTI 1209 PN99584-0050 Rev. E
Original Instructions
36
9.3.3
D
ETECTION
Z
ONE
The 4700 detection zone is delineated by the inside edge of the transmitter and receiver endcaps. The
area outside these marks is not protected. Position the 4700 so that it is only possible to access the
danger point through the detection zone.
9.3.4
M
ARKING
M
INIMUM
O
BJECT
R
ESOLUTION
Serial number labels on the transmitter and receiver indicate three possible minimum object
resolutions. During installation, use a permanent marker to obscure the object resolutions not set. This
will depend on whether no floating blanking, 1-beam or 2-beam floating blanking is set. See
9.3.5
A
LIGNMENT
Physical alignment of the transmitter and receiver units is easiest when the 4700 system is in the
automatic start operating mode with Exact Channel Select inactive. The units should be in the same
plane and at equal height.
The Individual Beam Indicators will light when a beam is out of alignment. See Section 6.2
for details.
9.3.6
I
NPUT
P
OWER
R
EQUIREMENTS
/C
ONNECTIONS
• DIN controller and DC metal chassis controller:
The 4700 system operates directly from 24 VDC ± 20%, 2.25A*. Power to the 4700 system must come
from a dedicated power supply which must meet the requirements of IEC60204-1 and IEC 61496-1,
STI part number 42992 or equivalent. The 4700 system internally generates voltages for its own use.
No other devices should be connected to these voltages.
*Internal consumption of power by the controller is less than 10 watts (415mA)
• AC metal chassis controller:
100 - 230 VAC @ 30 VA.
9.3.7
S
PECIAL
R
EQUIREMENTS
FOR
P
ERIMETER
G
UARDING
In perimeter guarding applications the 4700 detection zone is placed around the outside perimeter of a
guarded machine or robot. This placement leaves space for personnel to stand between the detection
zone and the hazardous machine.
In this case, the guarded machine must only be restarted using a switch located outside and with a full
view of the area of hazardous motion. Operation of the 4700 system in the start/restart interlock
operating mode is suitable for perimeter guarding.
9.3.8
P
RESENCE
S
ENSING
D
EVICE
I
NITIATION
Using the light curtain to initiate a machine after an object is removed from the sensing area is called
Presence Sensing Device Initiation (PSDI). Use of PSDI places additional requirements on the
guarding and safety controls. It can restrict advanced light curtain features such as Floating Blanking
and Exact Channel Select. Contact OMRON STI for further information. Good sources of reference for
PSDI include: ANSI RIA 15.06-1999, OSHA 1910.217(h), and ANSI B11.2-1995.