AMETEK 2120 PLC Interface Module - Manual (Page 61)

Installation and Programming Manual
Glossary
57
thus improving the resolution.
Relay Output Module This module contains an upper and lower limit relay. These relays
are programmable to de-energize or energize when the machine
moves outside either of the relay’s specifi ed limits.
Resolver Module This module is used with any Gemco resolver.
Supervisory Functions A group of functions hidden from normal use and intended
specifi cally for the equipment supervisor. For example, a function
is provided to change the access code which puts the monitor in
program mode. These functions can only be programmed when the
monitor is in supervisory mode.
Supervisory Mode A mode of operation the monitor must be in before a supervisory
function can be programmed. The supervisory mode access code is
used to put the monitor in supervisory mode.
Upper Limit Relay Located on the relay output module, this relay consists of one
pair of N.O. contacts and one pair of N.C. contacts. This relay is
programmable to de-energize when the machine moves above the
programmed upper end limit.
Variable Pulse Module V1 This module is used with a Linear Displacement Transducer (LDT)
that operates on variable pulses, such as Gemco’s 951 VP-1992
LDT. This module provides +24 VDC to supply power to the LDT
and interface for the RS-422 output signal.
Wire Speed The time it takes a pulse to travel the guide rail on an LDT. For
example, a LDT set to a wire speed of 9.000 microseconds has
pulses that travel its guide rail at a speed of 9.000 microseconds
per inch.