Data Acquisition


  • Current or Voltage Output
  • High Resolution: 16-bit
  • Software Selectable Current or Voltage Output
  • Open Wire Detection for Current Output
  • Readback Voltage or Current
  • Configurable Power-on Value and Safe Value Settings
  • Programmable Output Slope
  • Built-in Dual Watchdog


The I-7021 is a 12-bit and I-7021P is a 16-bit, 1-channel Analog Output module that is designed for both voltage and current output. The I-7021 features 3000 VDC intra-module isolation and the power source for the current output can be selected as either internal or external via a jumper. Options are also provided to allow power-on and safe values to be set. Both support the DCON protocols which can be configured via software.


• Building Automation
• Factory Automation
• Machine Automation
• Remote Maintenance
• Remote Diagnosis
• Testing Equipment


 CPU Module
 Watchdog Timer Module, Communication (Programmable)


 Intra-module Isolation 3000 VDC


 EMS Protection
 EFT (IEC 61000-4-4) ±4 kV for Power Line
 ESD (IEC 61000-4-2) ±4 kV Contact for Each Terminal
 Surge (IEC 61000-4-5) ±0.5 kV for Power Line


 LED Indicators
 Status 1 x Power and Communication


 Analog Input
Channels 1 Unipolar
Type Voltage
Range Voltage: 0 ~ +10 V
Current: 0 ~ +20 mA, +4 ~ +20 mA
Resolution 16-bit
Accuracy ±0.02% of FSR
Short Circuit Protection Yes
DA Output Response Time 10 ms
Programmable Output Slope Voltage: 0.0625 ~ 1024.0 V/Second
Current: 0.125 ~ 2048 mA/Second
Open Wire Detection For Current Only
Readback Accuracy ±0.5% of FSR
Current Load Resistance Internal Power: 500 Ω
External Power: 1050 Ω
Power-on Value Programmable
Safe Value Programmable


 COM Ports
 Ports 1 x RS-485
 Baud Rate 1200 ~ 115200 bps
 Data Format (N, 8, 1)
 Protocol DCON


 Reverse Polarity Protection Yes
 Input Range +10 ~ +30 VDC
 Consumption 1.8 W


 Dimensions (mm) 72 x 123 x 35 (W x L x H)
 Installation DIN-Rail Mounting


 Operating Temperature -25 ~ +75 °C
 Storage Temperature -40 ~ +85 °C
 Humidity 10 ~ 95% RH, Non-condensing



 I-7021P-G     CR  1-ch 16-bit AO Module using DCON Protocol (Gray Cover) (RoHS) 1