3. AIAO Units
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3.1.3 ELC-AN06AANN
3.1.3.1 The A/D, D/A Conversion
In industrial automation, many devices transmit data via analog signals. The most common
analog signals are -10 ~ 10V and -20 ~ 20mA. The analog input modules convert these analog
signals to digital values for the ELC controller. Analog output modules convert digital values to
analog signals. The AN06AANN has both analog inputs and outputs.
For example, the voltage -10 ~ 10V is first converted into a decimal range with an A/D module.
These are analog inputs. Analog outputs convert a specified decimal range from the controller
into analog signals such as 0ma ~ 20ma. The ELC reads/writes to the control registers (CR) in
the analog modules with FROM/TO instructions for configuration and reading/writing analog
data.
3.1.3.2 Introduction
The ELC-AN06AANN module is a combination analog I/O module. It has 4 analog inputs and 2
analog outputs (voltage or current). This module converts analog input data into a 12 bit digital
values. The analog outputs convert digital values from the controller into analog signals. The
module is configured by the controller via TO instructions in the ladder logic program. Other data
such as the actual analog data is transmitted between the controller and the analog modules via
TO and FROM instructions in the controller. There are 49 Controlled Registers (CR) in the
AN06AANN module (each register is a 16 bit value).
3.1.3.3 Specification
Functional Specifications
Analog/Digital (A/D)
Voltage input
Current input
Power supply voltage
24V DC (20.4V DC ~ 28.8V DC) (-15% ~ +20%)
Analog input channel
4 channels/module
Range of analog input
±10V
±20mA
Range of digital
conversion
±2,000 ±1,000
Resolution
12 bits (1
LSB
= 5mV)
11 bits (1
LSB
= 20
μ
A)
Input impedance
200K
Ω
or higher
250
Ω
Overall accuracy
±0.5% when in full scale (25°C, 77°F)
±1% when in full scale within the range 0 ~ 55°C, 32 ~ 131°F
Response time
3ms × the number of channels
Isolation
Between analog and digital channels
Range of absolute
input
±15V ±32mA
Digital data format
13 significant bits out of 16 bits are available; in 2’s complement
Average function
Yes; available for setting up in CR#2 ~ CR#5
Range: K1 ~ K4,096 (06XA-S), K1 ~ K20 (06XA-H)
