6 Digital Input/Outputs
The DMI15 has 2 digital inputs and 4 digital outputs which can be read or set via the reader.
The input pins are optically isolated 24 V DC inputs as is common in automation
technology. Up to 10 mA are needed to set the input to "high".
The output pins are 24 V high side switch DC outputs with a maximum current of 250 mA
per pin. These can be used to directly power e.g. signal towers. In total a maximum output
current of 1000 mA for all pins is allowed when 24V DC power is supplied at the IO
connector. Otherwise the 13W PoE power limit will apply. Outputs are equipped with
internal overcurrent and overtemperature protection.
Parameter
min
typ
max
Supply voltage Vcc/ V
12
24
30
Vin High / V
12
24
30
Vin Low / V
-0.7
0
3
Vout High / V
Vcc-2
Vcc-0,5
Vcc
Vout Low / V
0
0,5
3V
Iout High / mA
200
250
270
Iin High / mA
4
10
25
Technical Documentation metraTec DMI15
Page 12 of 18
