Parker ACR2000, Hardware Manual

Page: 19 / 53

Chapter 1, ACR2000 Motherboard Hardware Set-Up 9
ACR2000 MOTHERBOARD JUMPERS
Digital Input Reference Select (J5)
This jumper selects the reference voltage to be used for the optically-isolated inputs. The
reference voltage selected applies to all inputs; there are no combinations available.
Isolated voltage (VEXT) refers to +24VDC.
WARNING
Wiring VEXT with the incorrect voltage will permanently
damage the Digital I/O circuitry. The isolated voltage
(VEXT) is selected as +24VDC.
Refer to Figure 1 for jumper location.
Digital Input Reference Jumper
Input Type Reference Voltage J5 User Supplies
Sinking Reference Inputs to
Is24VDC Voltage (VEXT)
1-2 Path to GEXT
Sourcing Reference Inputs to
Isolated Common (GEXT)
2-3 Path to +24VDC
(VEXT)
Table 1.4 ACR2000 Digital Input Reference Jumper