MPPS-2 is simplified microcontroller manometer
with m-bus interface. It is intended to measure pressure from 4-20mA transducers,
with maximum of 16 bars. MPPS-2 has m-bus interface and 2 channels for connecting 4-20mA pressure sensors.
It is with autonomous power supply from the grid, making it ideal for both passive and active sensors.
Measured value is transformed in range 0 - 16 bars, with precision of 0.01 bar. Linear correction can be carried through
m-bus in order to calibrate manometer to a reference 4-20mA generator with special manufacturer specific telegrams.
Device has short-circuit protection on both inputs, power supply and m-bus interface making it "hard-to-break".
Mounted on a standard М36 DIN-rail.
user
manual
M-bus telegram
power supply |
55-250Vac/85-350 Vdc |
nominal m-bus voltage |
36 VDC |
allowable m-bus voltage |
12 ÷ 42V DC |
nominal power consumption |
3mA (2 standard m-bus loads) |
number of channels |
2 |
display |
bi-color leds for Input activity, m-bus led |
measurement range |
0 to 16 bar |
precision |
0.01 bar
|
m-bus baudrate |
300 to 2400 bps
|
initial m-bus baudrate |
2400 bps, Even
|
dimensions (H/W/D) |
86/71/61 mm |
work temperature |
from 0° C to +50° C |
МPPS-2 are simplified 2-channel manometers, intended
to be connected in m-bus network. These devices do not have display and keyboard,
but can simultaneously measure current 4-20mA on two separate channels and transform it to pressure.
Device is designed for measuring from passive 4-20mA pressure transducers, that is why it has
autonomous switching power supply inside. All devices are factory calibrated with
reference current generator. However, there is a possibility user to carry out his own
linear correction for a particular sensor. This is made with special m-bus telegram and can be done
with Gineers software. According to m-bus device complies with basic m-bus telegrams (like SND_NKE, RSP_UD2,
primary and secondary address change, etc.) and is two m-bus loads for the master converter (3mA).
There is no backup battery because there is no point, since MPPS-2 returns only actual and instant
measured pressure. Further processing of the data (like timestamps, etc.) should be taken from
master device. Status of the inputs is signaled with two bi-color leds. They has three conditions -
green (all OK), yellow (sensor not connected) and red (short-circuit). Presence of m-bus is singaled with
additional standard LED. All inputs are protected against short-circuit - signal inputs, m-bus and power supply.
Device is mounted on a M36 DIN-rail.
Device complies with standard m-bus telegrams due to EN1434-3. It has one primary address and one secondary
address. They can be changed with any m-bus configuration program, which follows m-bus standard. Description
of m-bus telegram and code fields can be seen in m-bus description, downloadable from our site.