Advantech PCI-1241, User Manual

Page: 33 / 104

23 Chapter 3
3.2 Voltage Output Connection (PCI-1241 only)
PCI-1241 supports 4-axis voltage output channels for servo driver con-
trol. PCI-1241 provides proportional-type close loop control mode, and
each axis can be configured as close loop control mode or not indepen-
dently.
3.2.1 Voltage Output Specifications
• Resolution: 16 bits
• Power on value: 0V
• External load: must be over 2K
• Output range: ±10V maximum
3.2.2 Wiring Consideration
The follows is the wiring considerations and Figure 3-5 shows wiring dia-
gram between PCI-1241 and velocity-type SERVO MOTOR DRIVER.
Four voltage output channels of PCI-1241 are A0_VO, A1_VO, A2_VO
and A3_VO. These four channels are velocity command output for
connecting with Vcmd input channels of SERVO MOTOR DRIVER
accordingly.
Be noted that PCI-1241 ground channel GND must be connected to
ground pin of SERVO MOTOR DRIVER.
The motor encoder signal of SERVO MOTOR DRIVER (A/B/Z signals)
must be connected back to PCI-1241 in DIFFERENTIAL form. It’s rec-
ommended that the three sets of singles A, A/, B, B/ and Z, Z/ are sug-
gested using twisted pair cable to reduce common mode noise. In
addition, as shown in Figure 3-5 the shield net is used to reduce the inter-
ference of electromagnet.
Connect one side of the shield net to the external housing of SCSI-II 68-
pin connector (connected to PC frame ground) and the other side to
SERVO MOTOR DRIVER FG (Frame Ground). It helps to make sure
that Frame Ground of both PC and SERVO MOTOR DRIVER has con-
nected together to the same field ground.