User's Manual

PMAC VME Hardware Reference Manual
PMAC VME Connector Pinouts 27
P2 JMACH1 (96-Pin
Header) Continued
Front View
Pin # Symbol Function Description Notes
C11 CHB1 Input Encoder B Ch. Pos. 2
C12 CHB1/ Input Encoder B Ch. Neg. 2, 3
C13 CHA1 Input Encoder A Ch. Pos. 2
C14 CHA1/ Input Encoder A Ch. Neg. 2, 3
C15 DAC3 Output Analog out Pos. 3 4
C16 DAC3/ Output Analog out Neg. 3 4, 5
C17 AENA3/DIR3 Output Amp-Ena/Dir. 3 6
C18 FAULT3 Input Amp-Fault 3 7
C19 +LIM3 Input Neg. End Limit 3 8, 9
C20 -LIM3 Input Pos. End Limit 3 8, 9
C21 HMFL3 Input Home-Flag 3 10
C22 DAC1 Output Analog out Pos. 1 4
C23 DAC1/ Output Analog out Neg. 1 4, 5
C24 AENA1/DIR1 Output Amp-Ena/Dir. 1 6
C25 FAULT1 Input Amp-Fault 1 7
C26 +LIM1 Input Neg. End Limit 1 8, 9
C27 -LIM1 Input Pos. End Limit 1 8, 9
C28 HMFL1 Input Home-Flag 1 10
C29 FEFCO/ Output
FE/Watchdog Output
C30 A+15V Input
Analog +15V Supply
C31 GND Common Digital Common
C32 +5V Output +5V Power 1
The P2 connector is used to connect the PMAC to the first four channels (Channels 1, 2, 3, and 4) of servo amps,
flags, and encoders.
Note 1: In standalone applications, these lines can be used as +5V power supply inputs to power PMAC’s digital
circuitry. However, if a terminal block is available on your version of PMAC, it is preferable to bring the +5V
power in through the terminal block.
Note 2: Referenced to digital common (GND). Maximum of +
12V permitted between this signal and its
complement.
Note 3: Leave this input floating if not used (i.e. digital single-ended encoders). In this case, jumper (E18 - 21, E24
- 27) for channel should hold input at 2.5V.
Note 4: +
10V, 10mA max, referenced to analog common (AGND).
Note 5: Leave floating if not used; do not tie to AGND. In this case, AGND is the return line.
Note 6: Functional polarity controlled by jumper(s) E17. Choice between AENA and DIR use controlled by Ix02
and Ix25.
Note 7: Functional polarity controlled by variable Ix25. Must be conducting to 0V (usually AGND) to produce a
'0' in PMAC software. Automatic fault function can be disabled with Ix25.
Note 8: Pins marked -LIMn should be connected to switches at the positive end of travel. Pins marked +LIMn
should be connected to switches at the negative end of travel.
Note 9: Must be conducting to 0V (usually AGND) for PMAC to consider itself not into this limit. Automatic limit
function can be disabled with Ix25.
Note 10: Functional polarity for homing or other trigger use of HMFLn controlled by Encoder/Flag Variable 2
(I902, I907, etc.) HMFLn selected for trigger by Encoder/Flag Variable 3 (I903, I908, etc.). Must be conducting to
0V (usually AGND) to produce a 0 in PMAC software.