| General Specifications |
| Model |
Basic unit |
ARM-DI08N-4S |
ARM-DI08P-4S |
ARM-DO08N-4S |
ARM-DO08P-4S |
| Expansion unit |
ARX-DI08N-4S |
ARX-DI08P-4S |
ARX-DO08N-4S |
ARX-DO08P-4S |
| Power supply |
Rated voltage: 24VDC, Voltage range: 12-28VDC |
| Power consumption |
Max. 3W |
| I/O points |
NPN input 8-point |
PNP input 8-point |
NPN output 8-point |
PNP output 8-point |
| Control I/O |
Voltage |
0-28VDC input |
10-28VDC output (voltage drop: max. 0.5VDC) |
| Current |
10mA/point (sensor current: 150mA/points) |
0.3A/point (leakage current: max. 0.5mA ) |
| Common |
8 points, Common |
| Special function (input) |
Counter for 16-bit (30CPS*1 ) (only when using digital input unit of ARM, ARX) |
| Communication speed*2 |
2400, 4800, 9600, 19200, 38400, 57600, 115200bps (default: 9600bps) |
| Communication method |
2-wire half duplex |
| Communication distance |
Max. 800m |
| Multi-drop |
Max. 32 multi-drop |
| Medium access |
POLL |
| Application standard |
Compliance with EIA RS485 |
| Protocol |
Modbus RTU |
| Data bit |
8-bit |
| Stop bit |
1-bit or 2-bit (default: 2-bit) |
| Parity bit |
None/Odd/Even (default: none) |
| Isolation method |
I/O and inner circuit: photocoupler insulation
Modbus to internal bus and inner circuit: insulation
Unit power: non-insulation |
| Insulation resistance |
Over 200MΩ (at 500VDC megger) |
| Noise immunity |
±240V the square wave noise (pulse width: 1us) by the noise simulator |
| Dielectric strength |
1,000VAC 50/60Hz for 1 minute |
| Vibration |
1.5mm amplitude at frequency of 10 to 55Hz (for 1 min) in each X, Y, Z direction for 2 hours |
| Shock |
500m/s2 (approx. 50G) in each X, Y, Z direction for 3 times |
| Environment |
Ambient temp. |
-10 to 55℃, storage: -25 to 75℃ |
| Ambient humi. |
35 to 85%RH, storage: 35 to 85%RH |
| Protection structure |
IP20 (IEC standards) |
| Protection circuit |
Surge, short-circuit, overheat (over 165℃) and ESD protection, reversed polarity protection circuit |
Over current protection circuit
(operated at min. 0.17A) |
Over current protection circuit
(operated at min. 0.7A) |
| Indicator |
Network status (NS) LED (green, red), unit status (MS) LED (green, red)
I/O status LED (input: green, output: red) |
| Material |
Front case, body case: Polycarbonate |
| Mounting |
DIN rail or bolt mounting type |
| Approval |
CE |
| Weight *3 |
Basic |
Approx. 123.3g (approx. 61.8g) |
Approx. 123.3g (approx. 61.8g) |
Approx. 123.3g (approx. 61.8g) |
Approx. 123.3g (approx. 61.8g) |
| Expansion |
Approx. 117.5g (approx. 56g) |
Approx. 118.5g (approx. 57g) |
Approx. 119.5g (approx. 58g) |
Approx. 120.5g (approx. 59g) |
*1: CPS (counter per second): Specification of accepting external signals per second
*2: The communication speed is automatically set to the communication speed of the Master (PC, PLC, etc.). When changing the communication speed during operation, the network status (NS) LED flashes in red and communication is not possible.
*3: The weight includes packaging. The weight in parenthesis is for unit only.
*Environment resistance is rated at no freezing or condensation. |