bmcm MAL-UI Manual de usuario
MAL-UI
Miniature amplifiers for voltage and current
Perfectly conditioned.
Voltage and current.
Voltage and current signals can optimally be ad-
justed to the input of a PC data acquisition system
with the miniature measuring amplifier MAL-UI.
It features a 5V sensor supply for connected sen-
sors.
Minimum size.
Great performance. Small price.
The miniature format of the MAL-UI is ideal to
realize measurement applications even if the in-
stallation is in problematic locations. Despite the
small size, the measuring amplifier features great
functionality. All this at a reasonable price.
±10V, ±5V, ±1V in. ±5V out.
Input ranges of ±10V, ±5V, or ±1V can be con-
figured for the MAL-UI via solder bridges. A
±5V signal proportional to the input signal is pro-
vided at the output.
Versatile.
In addition to signal conditioning of voltages, the
MAL-UI can be used for current measurement in
the ±20mA range. Changing the operating mode
is done via soldering bridges on the bottom side
of the board.
Compatibility.
The MAL series provides a great variety of
measuring amplifiers, measuring converters, or
filter modules. They can be used in any combina-
tion allowing for the solution of the most individ-
ual measuring tasks.
Get connected.
With the backplanes of the BP series varying in
size and design, signal connection is easy. The
modules just have to be plugged on the relevant
slot of the backplane.
Functional diagram
MAL-UI
1Installation
The measuring amplifier is plugged onto a 24-pole socket. If the
marking of the socket is on the left, pin 1 is bottom left.
!
Check for correct poling. Change modules only at no load!
2Pin assignment
The pin assignment of the MAL-UI is illustrated in the figure above and in the following table.
Pin Name Function Pin Name Function
1, 2 n. c. - 13, 14, 15 n. c. -
3 +EX sensor supply +5V 16 -UBsupply -7.5V..-15V
4 +IN HI signal input 17, 18 n. c. -
5 -IN LO signal input 19, 20 n. c. -
6 0EX sensor supply 0V 21 n. c. -
7, 8, 9, 10 n. c. - 22 OUT
amplifier output ±5V
11 GND power supply ground 23 n. c. -
12 n. c. - 24 +UBsupply +7.5V..+15V
3Jumper configuration
The MAL-UI can process both voltage (measuring range ±10V, ±5V ±1V)
and current (measuring range ±20mA) signals. Switching to another operat-
ing mode (voltage/current measurement) or measuring range is done by
changing the configuration of the solder jumpers on the bottom of the mod-
ule (also see chapter 4"Interfacing examples").
The cut-off frequency of the MAL-UI is set via the solder bridges PL8 and
PL9, its value varying in dependence of the chosen measuring range.
With PL1 closed, a 5V power supply for active sensors is provided at the +EX pin of the measuring ampli-
fier. It can be used, for example, in the backplanes of the BP series (see chapter 5) of bmcm.
Factory setting of the MAL-UI is voltage measurement in the ±10V range with 140Hz cut-off frequency and
5V sensor supply (default setting marked in red).
Cut-off frequency fgOperating
mode
Bridge
closed
Measuring
range PL8 closed , PL9 open PL8 closed , PL9 open PL8+PL9 open
Voltage PL12 ±10V 140Hz 15Hz 340Hz
Voltage PL11 ±5V 75Hz 8Hz 340Hz
Voltage PL10 ±1V 15Hz 2Hz 340Hz
Current PL5 + PL10 ±20mA 15Hz 2Hz 340Hz
!
•Only close one solder bridge at a time to configure the operating mode (PL10, PL11, or P12) and
the cut-off frequency (PL8 or PL9).
•All other jumpers are for internal use only and must not be changed!
Page 2
MAL-UI
4Interfacing examples
The module output is proportional to the input voltage in all operating modes and ranges. Apply cable shield
at one end only. If earthing is required, connect the screen only at one end, otherwise there is a risk of hum
pick-up.
4.1 Voltage measurement (DC)
DC voltages within the allowed input range are provided at the output as a
±5V signal to be connected to a PC data acquisition system.
•PL12 closed: ±10V (input) ≈±5V (output)
•PL11 closed: ±5V (input) ≈±5V (output)
•PL10 closed: ±1V (input) ≈±5V (output)
Connect LO and 0EX for unipolar measurement.
4.2 Current measurement
For current measurement with MAL-UI, a 50Ωshunt is activated (PL5
closed). The measurement is done in the ±1V measuring range.
!
Do not connect any power sources as otherwise the shunt might be
overloaded!
5Other MAL amplifiers and connection technology (BP series)
A great variety of miniature measuring amplifiers with or without galvanic isolation is available. The back-
planes of the BP series from bmcm different in size and design allow the comfortable connection to the data
acquisition system and for the amplifier supply. The MAL measuring converters can be plugged on the
backplanes in any combination.
Page 3
MAL-UI
Page 4
The following MAL modules and BP backplanes from bmcm are available:
Product Description
MAL-ISO1/5/10/50 Galv. isolating miniature amplifier for voltage (±1V/±5V/±10V/±50V) and current (±20mA)
MAL-FU Frequency-voltage converter in miniature format
MAL-PT100 Miniature amplifier for temperature (PT100, 0..300°C)
MAL-R1K Miniature amplifier for resistance (0..1kΩ)
MAL-SEIKA Miniature amplifier for SEIKA sensors (±0.5V measuring range, 2.5V offset)
MAL-SG2/5 Miniature amplifier for strain gauge (±2mV/V or ±5mV/V)
MAL-THR Miniature amplifier for temperature (thermocouple, type K, 0..1250°C)
MAL-UI Miniature amplifier for voltage (±1V/±5V/±10V) and current (±20mA), 5V sensor supply
BP16 16 slots, external device in aluminum housing, 5V sensor supply, connections: 2x Sub-D37
BP2 2 slots, for DIN rail mounting, 5V sensor supply, connections: screw terminals
BP2-BOX 2 slots, external device in IP65 box, 5V sensor supply, connections: screw terminals
6Important notes for using the MAL-UI
•The MAL-UI is only suitable for extra-low voltages - please observe the relevant regulations!
•Only use an electrical isolated power supply unit (with CE).
•Turn off the power before mounting the module onto the carrier board.
•All accessible pins are electrostatic sensitive devices. Provide for a grounded conductive work place.
•MAL-UI must only be operated in closed housings (for reasons relating to EMC).
•Only use non-solvent detergents for cleaning. The product is designed to be maintenance-free.
•The module must not be used for safety-relevant tasks. With the use of the product, the customer becomes manu-
facturer by law and is therefore fully responsible for the proper installation and use of the product. In the case of
improper use and/or unauthorized interference, our warranty ceases and any warranty claim is excluded.
Do not dispose of the product in the domestic waste or at any waste collection places. It has to be either duly dis-
posed according to the WEEE directive or can be returned to bmcm at your own expense.
7Technical data
(typical at 20°C, after 5min., +7.5V supply)
•Input range
Measuring range DC: ±10V (close PL12, ex works), ±5V (close PL11), ±1V (close PL10) or 20mA (close PL5 + PL10)
Gain calibration at // Input resistance diff.: +10V // 300kΩ(for U) or 50Ω(for I)
Input suppressor circuit for 1sec: max. 200V (not in case of current measurement)
•Output range
Output voltage: ±5V DC
Output load: >1kΩ; recommended for higher accuracy: >10kΩ
Amplifier accuracy // Temperature drift: typ. 0.2% // 50ppm/°C
Output interference or output ripple: typ. 5mVss at app. 100kHz (from DC/DC converter of the backplane)
Current supply sensitivity: typ. ±10mV/V
Output filter // Filter cut-off frequency fg: 1-pole (6dB/oct.) // 2-340Hz (configurable with solder bridges PL8 + PL9)
The values for accuracy always relate to the respective measuring range. Errors might add at worst.
•General
Power supply // Current consumption: ±7.5V DC .. ±15V DC // 1mA (without connected sensor)
Sensor supply: +5V DC supply voltage with ±5% accuracy (typ.)
CE standards: EN61000-6-1, EN61000-6-3, EN61010-1; for decl. of conformity (PDF) visit www.bmcm.de
ElektroG // ear registration: RoHS and WEEE compliant // WEEE Reg.-No. DE75472248
Max. permissible potentials: 60V DC acc. to VDE, max. 1kV ESD on open lines
Dimensions // Protection type: plastic housing 33mm x 20mm x 15mm // IP30
Temperature ranges: operating temp.: –25°C..+50°C, storage temp.: –25°C..+70°C
Relative humidity: 0-90% (not condensing)
Delivery: product, description
Available accessories: module backplanes: BP16, BP2, BP2-BOX
Warranty: 2 years from date of purchase at bmcm, claims for damages resulting from improper use excluded
Manufacturer: BMC Messsysteme GmbH. Subject to change due to technical improvements. Errors and printing errors excepted. Rev. 4.5 01/19/2012
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