KEYENCE LK-G Series - Manual (Page 7)

5 LK-G-M-NO0-E
LK-G3001PV/LK-G3001P (PNP type)
24 VDC (-) and COM IN are common via a choke coil. Also, COM IN of the expansion
connector is common via a choke coil.
Common for all types
24 VDC (-), SG (GND) of USB, and SG (GND) of RS-232C are all common via a choke coil.
Make sure that a voltage potential difference does not occur with external devices such as
computers or PLC. If a voltage potential difference occurs, use the unit with insulation on
the LK-G power supply and the I/O terminals other than RS-232C and USB.
Precautions for a Positive Grounding Environment
When using a positive grounding environment, watch out for shorts through the COM
terminal.
LK-G3001V/LK-G3001 (NPN type)
LK-G3001P(V) LK-G3001P(V)
COM OUT
COM IN
DC24V(+)
DC24V(-)
DC24V
COM OUT
COM IN
DC24V(+)
DC24V(-)
DC24V
The power supply (24 VDC) shorts via the
COM terminals, causing malfunctions.
The power supply (24 VDC) shorts via the
COM terminals, causing malfunctions.
LK-G3001(V) LK-G3001(V)
COM OUT
COM IN
DC24V(+)
DC24V(-)
DC24V
COM OUT
COM IN
DC24V(+)
DC24V(-)
DC24V
GND GND