Device Addresses; Serial Port Cabling; Example - Performance Computer PT-VME161 User Manual

Device addresses

Check the device addresses of all SCSI devices to ensure that no conflicts occur. The device address of
the PT-VME161 is programmable and will be determined by your installed software.

Serial Port Cabling

The PT-VME161 Utility Serial Port interconnect is provided on the front panel. The signals are orga-
nized so that a mass terminated Insulation Displacement Connectors (IDC) can be used to create an RS-
232 DTE interconnect. See "Table 11: Utility Serial Port Pin Assignments" on page 75. A 12 inch tran-
sition cable is supplied with the PT-VME161 which converts between the 14-pin header and a female
shell (male pin) 25-pin D-Shell connector. If a longer cable or a different D-Shell connector sex is
required it can be assembled by following the example below. The Utility Port pin positions are noted in
14 13
the figure to the left.
12 11
10 9
8 7
The EIA/RS-232C Specification limits the maximum end to end cable length to 50 ft.
6 5
4 3
2 1

Example

VME64
Performance
Technologies
Following is an example cable with vendors and part numbers for the components. These configurations
have been tested at PTI. Figure 9 displays an example serial cable for the PT-VME161. The view is with
the connector sockets pointing towards you.
An interface cable can be constructed using a 14 conductor ribbon cable to attach a 25-Pin D-Shell IDC
to a 14 contact ribbon cable IDC socket. To conserve front panel space only a 14 pin connector is used,
however the 25-Pin D-Shell expects 25 conductors, so pin-1 of the ribbon cable must be justified to the
pin-1 end of the D-Shell connector. It is recommended that the cable be no longer than necessary for your
particular application.
D-Shell Connection
25 position Insulation Displacement Connector Male, D-Shell connector derived from DIN 41612
type C, with rows A and C populated (socket):
Ribbon cable
14 Conductor 28 AWG. Flat Cable
RS232 Serial Port connector
14 Pin Flat Cable Connector center polarized
3M 8225-6003 or
T&B 609-25P-MA2
Spectra-Strip 843-191-2801-014 or
3M 3365/14
Extensible Single Board Computer/Controller User's Manual 25
Performance Computer