E L C O p e r a t i o n M a n u a l
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w w w. e a t o n . c o m
MN05003006E
1-2
3.1 ELC
Series
3.1.1
ELC-AN04ANNN Analog Input Module
3.1.1.1 The A/D Conversion – Analog Input Modules
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.
For example, the voltage -10 ~ 10V is first converted into values -8,000 ~ +8,000 decimal by an
A/D module. The ELC reads/writes to the control registers (CR) in the analog modules with
FROM/TO instructions.
3.1.1.2 Introduction
This analog input module has 4 analog signal inputs (voltage or current) and converts them into
14-bit decimal values. The ELC program reads/writes data to/from the ELC-AN04ANNN analog
input module by using the FROM / TO instructions. There are 49 16-bit CR (Control Registers) in
the ELC-AN04ANNN.
3.1.1.3 Specifications
Functional Specifications
Analog/Digital module
Voltage input
Current input
Power supply voltage
24 VDC (20.4VDC ~ 28.8VDC) (-15% ~ +20%)
Analog input channel
4 channels or 6 channels/module
Range of analog input
±10V
±20mA
Range of digital
conversion
±8,000 ±4,000
Resolution 14
bits(1
LSB
= 1.25mV)
13 bits (1
LSB
= 5
μ
A)
Input impedance
> 200 K
Ω
250
Ω
Overall accuracy
±
0.5% when in full scale (25°C, 77°F)
±
1% when in full scale within the range of 0 ~ 55°C (32 ~ 131°F)
Response time
3 ms × the number of channels
Isolation
Isolation between digital area and analog area. No isolation among analog
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 ~ K100
Self-diagnosis
Upper and lower bound detection/channels
Communication mode
(RS-485)
ASCII/RTU mode
Communication speed: 4,800/9,600/19,200/38,400/57,600/115,200 bps
ASCII data format: 7-bit, Even, 1 stop bit (7, E, 1)
RTU data format: 8-bit, Even, 1 stop bit (8, E, 1)
RS-485 cannot be used when connected to ELC MPU in series.
Содержание ELCM Series
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