#Built-in "Addressable RS-485 to RS-232 Converter" firmware
#Support about 30 well-defined commands
#Support Dual-Watchdog commands
#Support Power-up value & safe value for DO
#The firmware can real-time monitor the onboard DI and control the onboard DO according to user's requirement
#The firmware can real-time monitor the RS-232 device and control the onboard D/O according to user's requirement
#Watchdog timer provides fault tolerance and recovery
#Low power consumption
#R.O.C. Invention Patent No. 086674, No.103060, No. 132457
    
      
        
            
      
Specification
    
      
Timer
Build-in Watchdog Timer     Yes

Connector
For I-7521/I-7522/I-7523     Male DB-9
For I-7521/I-7522/I-7523     13-pin screw terminal block ( accepts 16~26 AWG wires ); 3.81mm pitch
For I-7522A/I-7524/I-7527     14-pin screw terminal block ( accepts 16~22 AWG wires ); 3.5mm pitch

Isolation
COM2 (self-tuner ASIC inside)     Isolation voltage 3000V for I-7521/I-7522/I-7523

Self-tuner ASIC inside
For RS-485     COM2 , COM1

Communication speed
All ports     115.2K bps max

Digital Input/Output
Digital Input     Input type : non-isolated
On voltage level : +1V max (Connect to GND)
Off voltage level : +3.5V~30V (Open)
Digital Output     Output type : Open-collector
Output current : 100mA
Max load voltage : +30V/DC

Dimensions 
I-7521/I-7522/I-7523        119mm x 72mm x 33mm
I-7522A/I-7524/I-7527     123mm x 72mm x 33mm

Operating Environment
Operating Temperature     -25°C to +75°C
Storage Temperature       -40°C to +80°C
Humidity                           0 to 90%

Power
Protection     Power reverse polarity protection
Power requirement       10 to 30V/DC
Power consumption     2W (without display)
                                  3W (with display)