chapter describes basic encoder, amplifier, and limit signal connectivity
via 68-pin VHDCI (Very High Density Cable Interconnect, also known
as SCSI-5) receptacles for the XMP-PCI, XMP-CPCI-6U and XMP-CPCI-3U
controllers. The XMP-CPCI-6U and XMP-CPCI-3U are also offer a
rear I/O backplane connection option, which is described in Chapter
I/O via VHDCI Receptacles
STC-136 Terminal Blocks
offers STC-136 terminal blocks to assist in connecting controllers
to drives via VHDCI. STC-136 terminal blocks utilize preconfigured
cables from VHDCI receptacles. Each cable services one 68-pin
VHDCI connector; each STC-136 can service two cables. The
STC-136 terminal block provides a simple method for connecting
hardware to your controllers using conventional screw terminals.
Wires are connected to the terminal by inserting them into
slots on the terminal block and tightening lug screws. For
ease of use, numbering is identical between VHDCI receptacle
pins and STC-136 terminals.
users prefer alternatives to the STC-136 for connecting to
the XMP controller's VHDCI receptacles. If only a subset of
lines are being used, more compact hardware may be preferred.
Regardless how your connection scheme is configured, you may
use the VHDCI pin-out information in this chapter to design
I/O via Backplane Connection
CPCI-6U and -3U controllers perform input-output (I/O) via their
backplane connectors. For more information regarding backplane
analog I/O on CPCI form factors, please see Chapter
+5 and +24 Volt I/O
controllers accomodate +5VDC or +24VDC optoisolated inputs.
Resistors installed on each controller determine which I/O
voltage it is configured for; otherwise, they are electronically
identical. To determine which voltage your controller is configured
for, look for the small, white label.
configurations: +5V and +24V.
Under most conditions, motor axes are NOT freely
interchangeable with each other! Always check the compatibility
of wiring BEFORE plugging an axis into the connector of
a different axis. Otherwise, damage to components and/or
the controller may result.
attention to the use of power and ground returns. AGnd should
be used for the analog inputs. Digital system grounds (Gnd)
are provided for use as a system ground reference. These
grounds (AGnd, Gnd) are all tied to a single point on the
fused 5 VDC power is provided for external encoders. Be
careful to estimate the additional 5 VDC current required,
and the voltage drop across the cables.
STC-136 Terminal Blocks
blocks organize your system wiring, making them especially helpful
for lab development. The STC-136 terminal blocks route each
CBL-68 pin to a screw terminal on a DIN rail, (Phoenix Contact
base). Each STC-136 provides connection
to four (4) axes of I/O (a full motion block), and works with
both 24 VDC and 5 VDC systems.
STC-136 provides connectivity for two (2) axes.
note that terminal numbers for the STC-136 are matched one-to-one
with VHDCI connector pins. (For example, Pin #1 on the VHDCI
is the same as Terminal #1 on the STC-136, and so on.) Therefore,
even if you choose not to use STC-136 terminal blocks for
connection, you may still use the pin-out information in these
chapters to configure your own connectors.
full STC-136 wiring and pinout diagrams, see Chapter