11 installation, A0 - a1 – Electro Cam PL-1746 Series User Manual
Page 21
2-11 Installation
PS-4108-13-L16 I/O Rack Installation
Wiring Inputs
Wiring Analog Outputs
External
Power
Supply
Sinking
Device
I
0
I
1
I
2
I
3
I
4
I
5
I6
I7
C
(-)
(+)
External
Power
Supply
Sourcing
Device
I
0
I
1
I
2
I
3
I
4
I
5
I6 I7
C
(-)
(+)
I0
Group One Input
I1
Group Two Input
I2
Group Three Input
I3
Group Four Input
I4
Group Five input
I5
Group Six Input
I6
1st Cycle Enable
I7
Output Enable
See page 6-2 for more info.
Sinking
Devices
Sourcing
Devices
• Analog output modules source the analog signal.
• No external supply is required.
• Analog output signals are isolated.
"AO"
"-"
A0 - A1 -
Sinking/Sourcing Defined
Sinking means that when the logic is true and the output (or input device) is ON, the output (or input device)
is providing a DC common or ground to the connected device.
Sourcing means that when the logic is true and the output (or input device) is ON, the output (or input device)
is providing a +DC voltage to the connected device.
This information is important when interfacing an Electro Cam Corp. product with another electronic device. If you are using an Electro Cam Corp. product
input to an Allen-Bradley 1746-IN16 “sinking” input card* or similar A-B device, you have to supply a +DC voltage (Electro Cam Corp.
Sourcing output)
to this card, NOT a DC common or ground. In these cases,
Sinking is what the card does with the input voltage; sinks it to common or ground.
*Other manufacturers include, but not limited to: Koyo (formerly GE Series 1, Texas Instruments, or Siemens SIMATIC PLS’s) that use descriptions
similar to Allen-Bradley.