User guide

Multi Process Meter Instruction Manual
7
INTRODUCTION
The MPM is a multi-purpose, easy to use digital process meter ideal for level, flow
rate, temperature, or pressure transmitter applications. It accepts current and voltage
signals (e.g. 4-20 mA, 0-10 V). Three of the front panel buttons can be custom-
programmed for a specific operation. The analog input can be scaled to display the
process in two different scales; for example the upper display could indicate level in
feet and the second display could indicate the volume in gallons.
The basic model includes an isolated 24 VDC transmitter power supply that can be
used to power the input transmitter or other devices. An additional isolated 24 VDC
power supply is included with the 4-20 mA output option. A digital input is standard.
A fully loaded meter has the following: four SPDT relays, 4-20 mA output, and two 24
VDC power supplies. The MPM capabilities may be enhanced by adding the following
external expansion modules: four SPST relays (creating an eight-relay process meter),
two digital I/O modules with four inputs and four outputs each, RS-232 or RS-485
communication adapters.
The eight relays can be used for alarm indication or process control applications, such as
pump alternation control. The 4-20 mA isolated output, Modbus RTU serial
communications, and digital I/O options make the MPM an excellent addition to any
system.
ORDERING INFORMATION
85-265 VAC
Model
12/24 VDC
Model
Options Installed
MPM-100 MPM-200 No options
MPM-101 MPM-201 2 relays
MPM-120 MPM-220 4-20 mA output
MPM-121 MPM-221 4 relays
MPM-140 MPM-240 2 relays & 4-20 mA output
MPM-141 MPM-241 4 relays & 4-20 mA output
Accessories
Model Description
PMA-01 RS-232 serial adapter
PMA-02 Meter copy cable
PMA-03 RS-422/485 serial adapter
PMA-04 RS-232 to RS-422/485 isolated converter
PMA-05 RS-232 to RS-422/485 non-isolated converter
PMA-06 USB to RS-232 non-isolated converter
PMA-07 USB to RS-422/485 isolated converter
PMA-08 USB to RS-422/485 non-isolated converter
PMA-10 DIN rail mounting kit for two expansion modules
PMA-11 4 SPST (Form A) relays
PMA-12 4 digital inputs & 4 digital outputs (2 may be connected)
PMA-13 Suppressor (snubber): 0.01 µF/470 , 250 VAC