3 - 3
3. SIGNALS AND WIRING
(2) Explanation of signals
For the I/O interfaces (symbols in I/O column in the table), refer to this section(b)
(a) Signals
Signal Name
Pin Code
Pin No.
Function/Application
I/O Category
Driver power
supply
VDD
12
24V 10% is output across VDD-SG.
Connect with COM when using this power supply for the digital
interface.
Permissible current: 80mA
Digital I/F power
supply input
COM
13
Enter 24VDC 10% for digital interface.
Digital interface driver power supply input terminal.
Connect to VDD when using VDD as an interface power supply.
Connect a 24VDC, 80mA or more power supply here when using an
external power supply.
24V common
SG
5
Common terminal for VDD. Isolated from LG.
Signal common
SE
3
Common for open collector output.
Connect to SG.
Shield
SD
Plate
Connect one end of the shield cable.
Trouble
ALM
8
ALM-SG are disconnected when the protective circuit is activated
to shut off the base circuit at power-off.
They are connected when the status is normal at power-on.
DO-1
(b) Output interface (DO-1)
A lamp, relay or photocoupler can be driven. (Permissible current: 40mA or less, inrush current:
100mA or less)
For use of internal power supply
For use of external power supply
VDD
Converter unit
ALM
If the diode is not
connected as shown,
the converter unit
will be damaged.
24VDC
COM
Load
SG
ALM
SG
VDD
24VDC
COM
Converter unit
If the diode is not
connected as shown,
the converter unit
will be damaged.
Load
Do not connect
VDD-COM.
24VDC
10%
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