DS, VersaPoint I/O Module, GFK-1906
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DS, VersaPoint I/O Module, GFK-1906
VersaPoint I/O Module
Analog In 15 Bit Voltage/Current 2 Channels
IC220ALG220
GFK-1906
April 2001
1
Module Specifications
Housing dimensions
(width x height x
depth)
12.2mm x 120mm x 71.5mm
(0.49in. x 4.8in. x 2.86in.)
Connection style
2- and 3-wire
Power for sensors
External power supply
Operating
temperature
-25C to +55C
(-13F to +131F)
Storage temperature
-25C to +85C
(-13F to +185F)
Operating humidity
75% on average. Take
appropriate measures against
increased humidity (> 85%).
Storage humidity
75% on average
Degree of protection
IP 20 according to IEC 60529
Class of protection
Class 3 according to VDE 0106,
IEC 60536
Power Consumption
Communications
power U
L
7.5V
Current consumption
from local bus U
L
Approximately 45 mA, typical
I/O supply voltage
U
ANA
24VDC
Current consumption
from analog bus
U
ANA
Approximately 12mA, typical
Total power
consumption
Approximately 0.63W, typical
Module IC220ALG220 is used to measure analog voltage or
current signals.
Module with the I/O Terminal Strip plugged in
Module IC220ALG220 requires one (1) I/O Terminal Strip,
IC220TBK061, ordered separately. See the ordering
information below.
Features
S
Two analog single-ended inputs for either voltage or
current signals
S
Connection of 2- and 3-wire sensors
S
Three current ranges: 0 to 20mA, 20mA, 4 to 20mA
S
Two voltage ranges: 0V to 10V, 10V
S
Configuration of the independent channels
S
Measured values can be represented in two formats
S
Resolution independent of representation format and
measuring range
S
Process data update of both channels in 1.5mS, max.
S
Diagnostic
indicators
Ordering Information
IC220ALG220
Analog In 15 Bit Voltage/Current 2
Channels
IC220TBK061
I/O Terminal Strip with Shield, quantity 5
VersaPoint I/O Module
Analog In 15 Bit Voltage/Current 2 Channels
IC220ALG220
GFK-1906
April 2001
2
Installation Instructions
High current flowing through the segment and main power busses raises the temperature of the components within the
module. To keep the current flowing through the power busses of the analog modules as low as possible, a separate
main circuit should be used for analog modules. If analog modules must be used in a main circuit together with other
modules place the analog modules to the right of the standard modules, at the end of the main circuit.
Terminal
Signal
Assignment
1.1
+U1
Voltage input channel 1
2.1
+U2
Voltage input channel 2
1.2
+I1
Current input channel 1
2.2
+I2
Current input channel 2
1.3
-1
Return for channel 1 (common
for current and voltage)
2.3
-2
Return for channel 2 (common
for current and voltage)
1.4, 2.4
Shield
Shield connection
LED
Color
Meaning
Connections
Connect sensors using shielded, twisted-pair cables.
Connect the shielding of the cable to the shield
connector clamp. With the clamp, the shield is
connected with high-resistance and capacitance to FE
GND on the module. Additional wiring is not necessary.
Do not connect voltages above 5V to a current input.
This can damage the module electronics by exceeding
the maximum current of 100mA.
Use a connector with shield connection when installing
the sensor. The following diagrams show the
connection schematically (without the shield connector).
CAUTION: Do not simultaneously apply current and
voltage signals to an input channel.
D
Green
Bus diagnostics
Example: Connection of Active Sensors
Connection of active sensors with 2-wire technology
with shield connection:
A. Active sensor with voltage output (channel 1)
B. Active sensor with current output (channel 2)
Example: Connection of Passive Sensors
Connection of two passive sensors with 2-wire
technology with shield connection, showing the passive
sensor supply.
The sensors are powered by a Segment Terminal
module (left). They can also be supplied from an external
power supply.
VersaPoint I/O Module
Analog In 15 Bit Voltage/Current 2 Channels
IC220ALG220
GFK-1906
April 2001
3
Internal Circuit Diagram
Electrical Isolation
Protocol chip (bus logic including voltage
conditioning)
Optocoupler
Programming Data
DC/DC converter with electrical isolation
ID code
7F hex (127 decimal )
Microprocessor with multiplexer and
analog/digital converter
Length code
02 hex
Reference voltage
Input address area
4 bytes
Electrically erasable programmable read-
only memory
Output address area
4 bytes
Amplifier
Parameter channel (PCP)
0 bytes
Coupling network
Register length (bus)
4 bytes
VersaPoint I/O Module
Analog In 15 Bit Voltage/Current 2 Channels
IC220ALG220
GFK-1906
April 2001
4
Output Data Words for Channel Configuration
The module receives two output data words. These data words are used to configure the module. The modules default
configuration can be used without change, or each channel can be configured independently. This configuration setting is
not saved, and must be transmitted in each logic scan.
Default channel configuration:
Measuring range:
0 to 10 V
Averaging: On,
16-fold
Output format:
Signed 15-bit
The following parameters can be configured:
S
The measuring range for the input signal. (Selection of current or voltage operation is determined by the physical wire
connection of the modules input terminals).
S
Averaging
on/off
S
Format of the input data
After powerup, the message measured value invalid (error code 8004 hex) appears in the input data. After 1 second
(maximum) the preset configuration is accepted and the first measured value is available.
If the channel configuration is changed, the corresponding channel is re-initialized. The message measured value invalid
(error code 8004 hex ) appears in the input data for 100mS.
Process Data Output Format
Each channel has one process data output word associated with it. You must set bit 15 of the corresponding output word
to 1 to reconfigure the channel. If bit 15 = 0, the default configuration is used.
Bit
Assignment
Code
Description
0
Default
15
Configuration
1
Configuration data
00
16-fold average
01
No filter
9, 8
Filter
10, 11
Reserved
00
Signed, 15-bit resolution
01, 10
Not used
5, 4
Format
11
Standardized representation
0000
0V to 10V
0001
10V
Measuring
Range
(Voltage)
0010 to 0111
Reserved
1000
0mA to 20mA
1001
20mA
1010
4mA to 20mA
3 - 0
Measuring
Range
(Current)
1011 to 1111
Reserved
VersaPoint I/O Module
Analog In 15 Bit Voltage/Current 2 Channels
IC220ALG220
GFK-1906
April 2001
5
Process Data Input Words
The measured input values are transmitted, per channel, to the controller. The figure below shows the sequence of the
input data words.
Channel 1
(2 bytes)
Channel 2
(2 bytes)
For each channel, the format of the input data can be independently configured in two input data formats, as shown
below. For both formats, the measured value is represented in bits 14 to 0. An additional bit (bit 15) is available as a sign
bit.
Default Input Data Format
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Sign
Analog Value
Standardized Representation Input Data Format
In this format, the measured data is standardized to represent the corresponding value without conversion. One bit
has the value of 1 mV or 1 A. (depending on which module terminals are used).
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Sign
Analog Value
Comparing Data Values in Both Formats
These data formats handle the same measured input values in different ways, as shown by the example below. On the
pages that follow, the input data formats are described in greater detail.
Example measurement range: 0mA to 20mA
Example measured value: 10mA
Format
Measured Value
HEX Input
Value
Decimal Input
Value
Default
10mA
3A98
15000
Standardized Representation
10mA
2710
10000
Channel Error Codes
In both formats, values greater than 8000H
indicate an error.
Hex
Decimal
Error
8001
-32767
Over range
8002
-32766
Open circuit
8004
-32764
Measured value invalid/no valid measured value available
8010
-32752
Configuration invalid
8040
-32704
Module defective
8080
-32640
Under range
VersaPoint I/O Module
Analog In 15 Bit Voltage/Current 2 Channels
IC220ALG220
GFK-1906
April 2001
6
Significant Measured Values
The tables below summarize significant values in both data formats.
Significant Values in Default Data Format
Measuring range
0mA to 20mA or 0V to 10V
Measuring range
-20mA to +20mA / -10V to +10V
Measuring range
4mA to 20mA
Input Data Word
(Twos Complement)
0mA to 20mA
Input
0V to 10V
Input
-20mA to
+20mA Input
-10V to +10V
Input
4mA to 20mA
Input
Hex
Decimal
mA
V
mA
V
mA
8001
overrange
+21.6746
+10.837
>
+21.6746
>
+10.837
> +21.339733
7F00
32512
+21.6746
+10.837
+21.6746
+10.837
+21.339733
7530
30000
+20.0
+10.0
+20.0
+10.0
+20.0
0001
1
+0.66667A
+333.33V
+0.66667A
+333.33V
+4.00053333
0000
0
0
0
+4.0 to 3.2
0000
0
<0
<0
0000
0
0
0
FFFF
-1
-0.66667A
-333.33V
8002
Open circuit
<+3.2
8AD0
-30000
-20.0
-10.0
8100
-32000
-21.6746
-10.837
8080
Underrange
<-21.6746
<-10.837
Significant Measured Values in Standardized Representation Format
In Standardized Representation format, one bit has the value of 1 mV or 1 A. Because of the st