User`s manual

Page - 19
3.0 - Installing and Configuring PMAC
3.1 - Jumpers Setup
On the PMAC, you will see many jumpers (pairs of metal prongs), called E-points (on the bottom board of the PMAC-STD
they are called W-points). Some have been shorted together; others have been left open. These jumpers customize the
hardware features of the board for a given application. It is strongly recommended to check each jumper configuration using
the appropriate hardware reference for the particular PMAC being set. Further instructions for the jumper setup could be
found in the PMAC User’s manual. After all the jumpers have been properly set PMAC can be installed either inside the
host computer or linked with a serial cable to it.
3.2 - Serial Connections
For serial communications, use a serial cable to connect your PC's COM port to the PMAC's serial port connector (J4 on
PMAC-PC, -Lite, and -VME; J1 on PMAC-STD's bottom board). Delta Tau provides cables for this purpose: Accessory
3D connects PMAC-PC or -VME to a DB-25 connector; ACC-3L connects PMAC-Lite to a DB-9 connector; and ACC-3S
connects PMAC-STD to a DB-25 connector. Standard DB-9-to-DB-25 or DB-25-to-DB-9 adapters may be needed for
your particular setup.
If you are using the ACC-26 Serial Communications converter, you will connect from the PC COM port to ACC-26 with a
standard DB-9 or DB-25 cable, and from ACC-26 to PMAC using the cable provided with ACC-26. Since the serial ports
on PMAC-PC and PMAC-VME are RS-422, this accessory can be useful to provide the level conversion between RS-232
and RS-422 (communications is possible without this conversion, but at reduced noise margin). Because the conversion is
optically isolated, the accessory also helps prevent noise and ground-loop problems.
If a cable needs to be made, the easiest approach is to use a flat cable prepared with flat-cable type connectors as indicated in
the following diagrams:
DB-9
Female
IDC-10
Do not connect
wire #10
11
DB-25
Female
IDC-26
Do not connect
wire #26
11