Omron FH-L550

FG (functional grounding terminal) DC input terminal (-V) DC input terminal (+V)
Indicate of termi-
nal block con-
nector
Name Function
+
DC input terminal
(+V)
Connect to the DC output terminal (+V) of 24 VDC power.
-
DC input terminal
(-V)
Connect to the DC output terminal (-V) of 24 VDC power.
FG (Functional
grounding termi-
nal)
Connect to the earth.
Functional grounding is done to protect device and system
functions, including prevention of noise from external sour-
ces, or prevention of noise from devices or equipment that
could have harmful ef
fects on other devices or equipment
• When you ground the FG, it may cause to enter noise into devices or equipment. If an equip-
ment malfunction or failure occurs, disconnect the FG from the ground and see if the condi-
tion improves.
•
For grounding, use a dedicated ground wire (2 mm
2
or larger) and apply Class D grounding
(third class grounding: 100 Ω or less grounding resistance).
• Do not share the Sensor controller’s ground with other equipment or ground the Sensor con-
troller to the metal structure of a building. Doing so may worsen operation. Whenever possi-
ble, use an independent ground (with the ground pole separated by a minimum of 10 m from
any other ground pole).
• Ground to 100 Ω or less, and if possible use a separate ground from those of other devices.
(Refer to figure (a) in the diagram below.)
• If using an independent ground is not possible, then use a common ground as shown in fig-
ure (b). Connect to the ground pole of the other device.
Sensor Controller Sensor Controller Sensor Controller
(a) Independent grounds:
Best
Grounding Methods
Other
device
Ground of
100 Ω or less
Other
device
Other
device
(b) Common ground:
Acceptable
(c) Common ground:
Incorrect
3 Insert the power supply terminal connector (male) into the power supply terminal connector (fe-
male) on the sensor controller side.
5 Setup and Wiring
5-13
FH Series Vision System Hardware Setup Manual (Z366-E1)
5-3 Sensor Controller Installation
5
5-3-3 FH-L Series