Polyrack Tech-Group - Glossary from M to P

MDC

Manual Daisy chaining with jumpers for VMEbus.

MPS

MPS
Abbreviation for Microcomputer Packaging System. Microcomputers for industrial use with VMEbus, VME, VME64x, CompactPCI and Industrial PC applications are set up predominantly according to an MPS.

Nema

Abbreviation for "National Electrical Manufacturers Association"

ON-Board-Termination

The termination is positioned before the first and after the last expansion slot on the backplane, which increases the outer dimensions of the backplane by approximately 2 U on both the right and left sides.

Open Frame

This term is used in reference to power supply units. So-called “Open Frame power supplies” don’t have a cover which means that the electronic components in the power supply are easily accessible.

PA6

Abbreviation for polyamide.

PC

Abbreviation for polycarbonate.

PCI

Abbreviation for "Programmable communication interface": This is a means for the serial data transfer which can be directly connected to the computer. It changes a parallel data value into serial data and transmits it. In can also receive serial data and change in into parallel data. The data transmission can be synchronous or asynchronous.

PE

Abbreviation for polyethylene

PFC

Abbreviation for Power Factor Correction. The Power Factor defines the relationship between the active power and apparent power for an electrical appliance. The higher the power factor for any given appliance, the higher its effectiveness.
The power factor correction serves to increase the effectiveness of an electrical appliance. This is achieved through the reduction of heat loss, reduction of high frequency EMC-interference as well as through an improvement of the mains voltage distribution process.

PICMG

PICMG refers to the Abbreviation for PCI Industrial Computer Manufacturers Group. The PICMG is a consortium of more than 600 companies that develop specifications for high end telecommunications and industrial computer applications in close cooperation. The PICMG specifications include the CompactPCI for euroboard formats, among others.

P0

The P0 is an additional I/O connection that can be freely allocated and is used in VME64x-backplanes. It is placed between the J1 and J2 levels. A PCI-Bus or Network bus can be connected to the P0 (compare to the VME64x specification ANSI/VITA 1.1-1994 thru 1.1-1997)

PP

Abbreviation for polypropylene.

PS

Abbreviation for polystyrene.

PUR

Abbreviation for polyurethane

PVC

Abbreviation for polyvinyl chloride.