Microsensor MPM4881 User manual
MPM4881 Pressure Transmitting Controller
MDM4881 Differential Pressure
Transmitting Controller
Operation Manual
Shaanzhi No. 03000112
Operation Manual
MPM/MDM4881
II
Contents
1 Features................................................................................1
2 Specifications........................................................................2
3 Principle................................................................................4
4 Outline Construction and Installation....................................7
5 Electric Connection...............................................................9
6 Parameters Setting and Usage...........................................11
7 Analog Output Switch..........................................................13
8 Hardware Lock....................................................................14
9 Communication Protocol.....................................................15
Be alert to possible electrostatic hazard! For controller in
normal use, maintenance and cleaning, any danger of
ignition caused by the electric charge shall be prevented;
when it is used in the explosive environment, touching or
scrubbing the controller is strictly prohibited. If user must
touch or scrub the product, please make sure to do it in
places with good ventilation and no gas leakage. Please scrub the product
with wrung-out damp cloth. It is strictly prohibited to clean the controller
housing with dry cloth.
Warning
MPM/MDM4881
III
Our company reserves the modification right for this operation manual due
to renovation of production technology and craftwork. If some information
is changed, no more notice will be edited.
Please pay attention to the latest version.
Our company also reserves the right of final explanation for this manual.
Version: V1.2
1
Thank you very much for selecting Micro Sensor’s product,
please take some time to read this operation manual very
carefully before using the product.
MPM/MDM4881 Pressure / Differential Pressure Transmitting
Controller is a digital meter integrating pressure measurement,
display, transmitting and control together. It adopts the
internationally advanced ARM processing chip. By
compensation and adjustment of the sensor, MPM/MDM4881
can achieve precise measurement, quick response & control of
multiple relays. The controller supports peak value record and
action delay, providing 4 digit LED display, easy for reading.
Multiple buttons make the operation easier and more convenient.
Either current or voltage output signal is available for choice. It
can be installed by back mounting, rail mounting, cover
mounting and joint mounting. Whole product protection is IP65.
MPM/MDM4881 offers 5-relay + 1-analog output. It can be
applied for long-distance pressure measurement and control in
equipment automatic pressure detection, action control and
water level alarm etc. It is also a preferred choice for working
fields where request high frequency / high accuracy switchover
or mechanical pressure relays is incompetent.
1 Features
Real-time pressure display in unit: Bar or MPa
14-segment LED display
Button programming, easy operation
Max. 5 relays control independently, time-delay function
2
Switchable analog output
Record the Max. pressure during operation(button for
clearing up)
Support back, rail, cover and joint mounting
Hardware wrong operation protection
Intrinsically safe products meet GB3836.1 and GB3836.4
standards, and have explosion-proof certification, Exia
mark is Ex ib IIA T6 Gb.
Modbus communication
2 Specifications
Input
Power Supply: Non Intrinsically Safe ：(220±44)V AC/22V~32V
DC;
Intrinsically Safe：22V~28V DC（Supplied by Safety Barrier）
Pressure Range: 0kPa~10kPa..60MPa(MPM4881);
0kPa~35kPa... 3.5MPa(MDM4881);
Overpressure: 1.5FS ;
Static Pressure: 20MPa (MDM4881)
Output
3
Accuracy:≤±0.25%FS;≤±0.5%FS; Repeatability:
≤±0.2%FS;
Display: 4 digit 0.56 inch 14-segment LED display;
Temperature Drift: ≤±0.03%FS/℃(zero/span);
Display Refresh: 200ms.
Analog Output
Current Version: 4mA~20mA DC, Load resistance ≤560Ω；
Voltage Version: 0V~10V DC, Load resistance ≥10kΩ.
Switch Output
Output Mode: 5 relays, normally open or close contact;
Voltage Supply: ≤277V AC;≤30V DC;
Current Supply: ≤3A；Response: < 1ms;
Relay Life: ≥10,000,000times/load (min.);≥100,000times/load
(max.);
Switch Point Setting: 1.5%FS~99%FS;
Return Difference Setting: 1%FS~10%FS;
4
Switch Delay: 0s~99s.
Environmental Conditions
Operation Temperature: -25℃~65℃/-13℉~149℉；
Relative Humility: 0%~85%;
Storage Temperature: -40℃~70℃/-40℉~158℉;
Media Temperature: -20℃~80℃/-50℉~176℉;
Electromagnetic compatibility: GB/T 17626.2/3/4-2006；
Shock: ≤5g/10Hz...500Hz(IEC 60068-2- 6-2007);
Impact: ≤10g/11ms(IEC 60068-2-27-2008);
Protection: IP65
Intrinsically safe explosion proof parameter
Supply terminal, Signal terminal:
Ui: 28V DC Ii: 93mADC Ci: 0.6uF Li: 4.0mH Pi: 0.65W
Relay Output Terminal：
Ui: 10.5V DC Ii: 14mA DC Ci: 0 uF Li: 0mH Pi: 37mW
3 Principle
MPM/MDM4881 Pressure /Differential Pressure
Transmitting Controller is a high performance controller with
5
internationally advanced ARM processing chip. It can process
the process pressure through 1 current output, 1 voltage output,
5-relay output and 1 LED display.
1、Display
When MPM/MDM 4881 is powered on, it displays“MPM” for
seconds, then display real time pressure.
User can set the display (real time pressure, max. pressure,
switch point) at Basic Settings Menu. After MPM/MDM 4881 is
powered on, it can display real time pressure, corresponding
switch point or max. pressure.
2、Output
①Relay output
MPM/MDM4881 has 5-relay output. Each relay can set 1
switch point and 1 hysteresis. When pressure gets to "switch
point", relays will act. When pressure return back to "switch
point-hysteresis", relays back to normal.
“SP1”…“SP5”= Switch point 1…5
“HYS1”…“HYS5”= Hysteresis 1…5
②Set switch point
·Press corresponding button ,eg. "P1"
·Display switch point code, eg. "SP1"
·2 seconds later, it displays real time setting value
·Press“+”or“－”key to change value
6
Press H1 display Set hysteresis
Set switch point
·3 seconds later, it displays the setting value
③Set hysteresis
·Press corresponding button ,eg. "H1"
·Display hysteresis code, eg.“HYS1”
·2 seconds later, it displays real time setting value
·Press“+”or“－”key to change value
·3 seconds later, it displays the setting value
④Analog output
MPM/MDM4881 output 4mA~20mADC or 0V~10VDC
(Please adjust at Basic Settings Menu)
3、Max. value is the max. pressure when MPM/MDM4881 is
started or the last time to be reset
①Display max. pressure ：Press button P4 and H4 at the
same time
Press P1 Display Set switch point
Set hysteresis
7
MPM4881
MI
CR O
麦克
麦克传感器有限公司
MICRO SENSOR CO,.LTD.
（220）
126 81.5
P1
H1
P2
H2
P3
H3
P4
H4
P5
H5
+
-
MDM4881
MI
CR O
麦克
麦克传感器有限公司
MICRO SENSOR CO,.LTD.
（220）
126 81.5
SW22 G1/4 female
P1
H1
P2
H2
P3
H3
P4
H4
P5
H5
+
-
②Reset max. pressure ：Press button P3 and H3 at the
same time
4 Outline Construction and Installation
（1）Construction and Outline Dimension
Unit: mm
Chart 1: MPM4881 Outline Construction and Dimension
Chart 2: MDM4881 Outline Construction and Dimension
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1
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