User`s manual

Installation 25

2.8 CN1 pin assignments: External Power Input (PCI-

8164 only)

NOTES

X CN1 is a plug-in terminal board with no screws.

X Use the external power supply. A +24V DC is used by exter-

nal input/output signal circuits. The power circuit configura-

tion is shown below.

X Wires for connection to CN1:

Z Solid wire: ϕ0.32 mm to ϕ0.65 mm (AWG28 to AWG22)

Z Twisted wire: 0.08 mm

to 0.32 mm

(AWG28 to AWG22)

Z Naked wire length: 10 mm standard

The diagram below shows the external power supply system of

the PCI-8164. An external +24V power must be provided. An on-

board regulator generates +5V for both internal and external use.

CAUTION The output current capacity of the +5V power source from

the onboard DC/DC is limited. DO NOT use this to drive

several devices simultaneously, especially stepper mo-

tors or external encoders.

NOTE MPC-8164 and PXI-8164 do not have the CN1 for power

input. Use the E_24V and EGND pins of CN2. L is an in-

ductor for EMI use.

CN1 Pin No Name Description

1 EGND External power ground

2 CN1_24V

+24V DC ± 5% External power supply