© PHOENIX CONTACT - 11/2007
100260_en_01
INTERFACE
MCR-VDC-UI-B-DC
Data Sheet
1Description
The MCR voltage transducer measures DC voltages in
several signal ranges from 0 ... ±20 V DC to 0 ... ±660 V DC
and converts them to standardized analog signals.
DC voltages can be processed with both positive and
negative polarity.
The input voltage ranges listed at input terminal blocks 1 to
7 can be varied by ±20% using a calibration potentiometer.
The voltage transducer is calibrated by default to 0 ... ±24 V
input and 0 ... ±10 V output and is ready for operation when
delivered. To use the device with other input or output
variables, carry out a ZERO/SPAN adjustment using the
potentiometer on the front.
1.1 Features
– 3-way electrical isolation
– True r.m.s. value measurement
– Adjustable voltage ranges
– ZERO/SPAN adjustment ±20%
1.2 Method of Operation
The input circuit divides the DC voltage at terminal blocks 1
to 7. The resulting signal is electrically isolated and
transmitted to the output circuit and is available at the output
as a standardized analog signal.
1.3 Field of Application
When using the voltage transducer, please ensure that the
potential difference between terminal blocks 1 to 7 to
ground potential PE or terminal block 8 to ground potential
PE U does not exceed ±660 V (this condition applies to
circuits that are not grounded).
In DC voltage networks, this potential difference must not
exceed U = ±100 V (this condition applies to circuits that are
grounded).
When these conditions are met, safe isolation is ensured
between input, output, and supply.
Make sure you always use the latest documentation.
It can be downloaded at www.download.phoenixcontact.com.
A conversion table is available on the Internet at
www.download.phoenixcontact.com/general/7000_en_00.pdf.
This data sheet is valid for all products listed on the following page:
Voltage Transducer for DC Voltages
MCR-VDC-UI-B-DC
100260_en_01 PHOENIX CONTACT 2
2Ordering Data
3 Technical Data
Description Type Order No. Pcs./Pck.
MCR voltage transducer, for DC voltages from 0 ... ±20 V DC to
0 ... ±660 V DC, output signal ±10 V/±20 mA
MCR-VDC-UI-B-DC 2811116 1
Voltage Measuring Input
Input voltage range (input resistance) ±550 V DC (550 kΩ)
±370 V DC (370 kΩ)
±250 V DC (250 kΩ)
±170 V DC (170 kΩ)
±120 V DC (120 kΩ)
±80 V DC (80 kΩ)
±54 V DC (54 kΩ)
±36 V DC (36 kΩ)
±24 V DC (24 kΩ)
Maximum input voltage ±660 V DC (not grounded)
Maximum input voltage ±100 V DC (to ground)
When these values are observed, safe isolation (EN 50178/DIN EN 50178/VDE 0160) is ensured between input, output, and supply.
Voltage Output
Voltage output signal -10 V ... 10 V
Maximum voltage output signal ±15 V
Load/output load voltage output > 10 kΩ
Ripple < 50 mVPP
Current Output
Current output signal -20 mA ... 20 mA
Maximum current output signal ±30 mA
Load/output load voltage output < 500 Ω
Ripple < 50 mVPP
Power Supply
Supply voltage range 18.5 V DC ... 30.2 V DC
Maximum current consumption < 50 mA
General Data
Limit frequency (3 dB) 40 Hz
Measuring principle True r.m.s. value measurement
Maximum transmission error < 1% (of final value)
Maximum temperature coefficient < 0.015%/K
Zero adjustment ±20%
Span adjustment ±20%
Step response (10 - 90%) 12 ms
Degree of protection IP20
MCR-VDC-UI-B-DC
100260_en_01 PHOENIX CONTACT 3
Pollution degree 2
Width x height x length 22.5 mm x 99 mm x 114.5 mm
Housing version Polyamide PA, non-reinforced, green
General Data (Continued)
Connection Data
Conductor cross-section, solid 0.2 mm2 ... 2.5 mm2
Conductor cross-section, stranded 0.2 mm2 ... 2.5 mm2
Stripping length 8 mm
Safe Isolation
Safe isolation According to EN 50178
Test voltage input/output 1.5 kV (50 Hz, 1 min.)
Surge voltage category II
Ambient Conditions
Ambient temperature (operation) -25°C ... +50°C
Conformance/Approvals
Conformance CE-compliant
UL, USA/Canada u
Conformance With EMC Directive 89/336/EEC
Noise Immunity According to EN 61000-6-2
Electrostatic discharge EN 61000-4-2 8 kV air discharge
Electromagnetic HF field
Amplitude modulation
Pulse modulation
EN 61000-4-3
10 V/m
10 V/m
Fast transients (burst) EN 61000-4-4 Input/output/supply:
2 kV/5 kHz
Surge current loads (surge) EN 61000-4-5 Input/output: 2 kV/42 Ω
Supply: 0.5 kV/2 Ω
Conducted interference EN 61000-4-6 Input/output/supply: 10 V
Noise Emission According to EN 61000-6-4
Noise emission according to EN 61000-6-4 EN 55011 Class A
MCR-VDC-UI-B-DC
100260_en_01 PHOENIX CONTACT 4
4Block Diagram
5Safety Notes
6 Structure
1Supply voltage
2Output
3Potentiometer for adjustment
4Inputs
5Upper part of the housing can be removed to set the
jumpers
6Universal snap-on foot for EN DIN rails
7 Installation
The assignment of the connection terminal blocks is shown
in the block diagram. The module can be snapped onto all
35 mm DIN rails according to EN 60715.
Install the module in suitable housing to meet the
requirements for the protection class.
Screw Connection
Insert the wires in the corresponding connection terminal
block.
Use a screwdriver to tighten the screw in the opening above
the connection terminal block.
CAUTION
Installation, operation, and maintenance may
only be carried out by qualified electricians. When
installing and operating the device, the applicable
safety directives (including national safety
directives), accident prevention regulations, as
well as general technical regulations, must be
observed.
CAUTION: Electrostatic discharge
The module contains components that can be
damaged or destroyed by electrostatic discharge.
When handling the module, observe the
necessary safety precautions against
electrostatic discharge (ESD) according to
EN 61340-5-1 and EN 61340-5-2.
+ 24VDC
+ 24VDC
OUT
IN
GND2
GND3
GND2
GND3
OUT U
OUT I
9
1
5
13
11
3
7
15
10
2
6
14
12
4
8
16
GND 1
±24V
±170V
±36V
±250V
±54V
±370V
±80V
±550V
±120V
J
J
J
5 6 7 8
1 2 3 4
5
6
7
8
MCR-VDC-UI-B-DC
Art.-Nr.: 28 11 11 6
GND 2
OUT I
APPROBATIONEN / APPROVALS
GND 2
1
2
3
4
13
14
15
16
OUT U
9
10
11
12
GND 3
+24VDC
GND 3
+24VDC
±550V
±170V
±370V
50V
GN
OUT
IN
10
2
3
!
"
4
OU
9
$
%
&
⁄
5
J1
8
7
J1
J1
6
OU
GN
70V
50V
70V
5
6
7
8
±250V
±120V
GND 1
± 80V
± 54V/± 36V/± 24V
MCR-VDC-UI-B-DC
IN
OUT
POWER
U1
GND1
I
GND2 GND2
+24V GND2 GND2
+24V
U
U5
U2
U6
U3
U7
U4
POWER
ZERO
SPAN
3
5
4
5
1
2
AB
B
1
B
2
MCR-VDC-UI-B-DC
100260_en_01 PHOENIX CONTACT 5
8 Configuration
8.1 Selecting the Input Voltage Range
8.2 Opening the Module
•Using a screwdriver, release the locked upper part of
the housing on both sides 1. The upper part of the
housing and the electronics can now be pulled out
approximately 3 cm 2.
8.3 Jumper Settings
•Place the jumper (J) in the desired setting for the input
voltage.
•Close the housing again until it engages with a click.
WARNING: Risk of electric shock
Never carry out work when voltage is present.
ATTENTION: Module damage due to excess
voltage
If the voltage signal exceeds the voltage range
specified at the input signal terminal block by
more than 15% (for 0 ... ±660 V more than 5%),
the input circuit may be damaged.
Input
Voltage
Adjustment
Range
(±20%)
[V DC]
Input
Terminal
Block
Jumper/
Setting
0 ... ±550 V (440 ... 660) 1
0 ... 370 V (296 ... 444) 2
0 ... 250 V (200 ... 300) 3
0 ... 170 V (136 ... 204) 4
0 ... 120 V (96 ... 144) 5
0 ... 80 V (64 ... 96) 6
0 ... 54 V (43 ... 65) 7 J1/setting 1
0 ... 36 V (28 ... 43) 7 J1/setting 2
0 ... 24 V (19 ... 29) 7 J1/setting 3
(default setting)
5 6 7 8
1 2 3 4
1
2
±
±
50V
IN
1
2
3
4
5
8
7
6
70V
50V
70V
±
IN
U
1
GND1
U5
U2
U6
U3
U7
U4
1
2
Carry out a ZERO/SPAN adjustment each time
the input or output range is changed.
HYBRID TV1
PHOENIX
CONTACT
J
1
2
3
54V
36V
24V
J
1
2
3
54V
36V
24V
MCR-VDC-UI-B-DC
100260_en_01 6
PHOENIX CONTACT GmbH & Co. KG • 32823 Blomberg • Germany • Phone: +49 - 52 35 - 30 0
PHOENIX CONTACT • P.O.Box 4100 • Harrisburg • PA 17111-0100 • USA • Phone: +717-944-1300
www.phoenixcontact.com
9 ZERO/SPAN Adjustment
The module is calibrated by default to 0 ... ±24 V input and
0... ±10 V output.
There are two potentiometers on the front of the module for
the adjustment:
– ZERO: Zero point adjustment
– SPAN: Final value adjustment
9.1 Zero Point Adjustment (ZERO)
•Connect a calibration device to the input terminal blocks
(U(1 - 7) and GND1) and specify a voltage of 0 mV.
•Set the output signal value using the ZERO
potentiometer:
– Voltage output (0 … ±10 V): UOUT = 0 V
– Current output (0 … ±20 mA): IOUT = 0 mA
9.2 Final Value Adjustment (SPAN)
•Use the calibration device to specify the maximum
voltage used within the input voltage range
(see "Selecting the Input Voltage Range" on page 5).
•Set the output signal value (UOUT = 10 V or
IOUT = 20 mA) using the SPAN potentiometer.
1
2 3 4
MCR-VDC-UI-B-DC
Art.-Nr.: 28 11 11 6
GN
OUT
0
!
"
OU
9
$
⁄
OU
GN
MCR-VDC-UI-B-DC
IN
OUT
POWER
U1
GND1
I
GND2 GND2
+24V GND2 GND2
+24V
U
U5
U2
U6
U3
U7
U4
POWER
ZERO
SPAN
Potentiometer Allow the module to warm up for 4 minutes before
starting the adjustment procedure.
