INTRODUCTION
GLOSSARY
1 - 4
I-E96-314A
®
GLOSSARY
Term
Definition
Dipshunt
Dual in-line package with shorting bars.
Dipswitch
A dual in-line package that contains single pole switches.
ESD
Electrostatic Sensitive Devices - Electronic components subject to damage
or failure when exposed to an electrostatic discharge; require special han-
dling.
Slave Expander
Bus
Parallel communication bus between the master module and the slave
located on the backplane of the MMU.
FCS
Frequency Counter Slave Module (IMFCS01).
Function Code
An algorithm that defines specific functions. These functions link together to
form the control strategy.
HSS
Hydraulic Servo Slave Module (IMHSS01).
Latch Register
A temporary storage buffer that holds a piece of data until instructed to move
it elsewhere.
MCU
Microcontroller - An independent microprocessor with on-board memory, I/O
ports, and support circuitry.
MFC
Multi-Function Controller Module (NMFC03/04/05).
MFP
Multi-Function Processor Module (IMMFP01/02).
MMU
Module Mounting Unit - a circuit card cage provides electrical and communi-
cation support to the modules.
PCB
Printed Circuit Board
TMU
Termination Mounting Unit - a circuit card cage providing slots to mount ter-
mination modules and cables.
TU/TM
Termination Unit/Termination Module - a PCB assembly which provides an
interface linking field wiring to input or output modules such as the FCS.
Watchdog Timer
An on-board self check, verifies that the module is operating correctly.
