Omron ZW-7000 Series User Manual page 9

• Handling fiber cables
Use them in compliance with the following. This may result in damage to the fiber cable.
- Fiber cable bend radiuses must be at least 20 mm.
- Do not yank hard on a fiber cable.
- Do not step on a fiber cable or place anything heavy on it.
- Do not apply any twisting stress to the fiber cable.
- Do not forcefully insert, or bend, or twist in a manner that would cause stress on the fiber connector when
connecting it.
- Do not let bending cause stress at the root section of a fiber connector and connection.
3. Grounding
• Use a frame ground terminal of the specified size to be grounded. Do not connect a wire with an only twisted
end directly to a terminal block.
Terminal screw: M4
Crimp-type terminal
8.5mm
or less
• Use D-type grounding (ground resistance of 100 Ω or less). Make the ground point as close as possible and
make the ground wire used as short as possible.
• Never share a ground wire with other equipment or connect to building beams to prevent the occurrence of a
potential difference between grounds (between 0V).
• The power supply circuit of the Sensor Controller is not insulated from the internal circuits.
• When grounding the positive (+) terminal of the 24 VDC power supply, do not connect the Sensor Controller's
frame ground terminal or PLC's frame ground terminal to ground. [(1), (2)]
The PC housing may be internally connected to the SG (0 V), in which case current will flow through the path
shown below and may cause seizure.
• If there is no PC, or specifically there is no SG (0 V)/FG short-circuiting path, grounding the Sensor
Controller's frame ground terminal will not cause seizure. Wire the PLC after checking the specification of
your PLC.
• The dedicated RS-232C cable (ZW-XRS2/XPT2) has its cable shield isolated from the connector housing.
[(3)]
Sensor Controller
24V
24V
24 V DC
power
supply
SG SG
FG
FG
(1)
4. Regulations and Standards
• EN61326-1
• Electromagnetic environment : Industrial electromagnetic environment (EN/IEC 61326-1 Table 2)
• The following condition is applied to the immunity test of this product.
: There may be cases that current or voltage output fluctuate within ± 3%F.S. when a sensor is experienced
electromagnetic interference.
ZW-7000/5000
User's Manual
8.5mm
or less
Power supply
circuit
connector housing
connector housing
SG: Signal Ground (0 V for 24 V DC power supply)
FG: Frame Ground
PC or PLC
RS-232C
SG
SG SG
SG
RS-232C
FG
FG
(3)
SG SG
SG SG
Ethernet
Ethernet
FG
FG
FG FG
(2)
7