Digital I/O Interface Unit

  • 4 input - 4 output - 1 relay SPDT
  • 9Vdc to 36Vdc Supply Voltage Range
  • DB 15 connector
  • Push in pcb terminals
  • Safety output current


The CAEN RFID RA0002 Digital I/O Interface Unit provides an easily accessible interface to the CAEN RFID readers’ digital inputs and outputs in order to connect external devices such as motion sensors, lightstacks and audible alarms.
The RA0002 KIT includes a dedicated cable for the R4301P – ION reader.


Digital I/O interface unit

Serial interface

DB15 (Connection to Ion R4300P Reader)


Push in pcb terminals

Supply Voltage Range

9 Vdc ÷ 36 Vdc , 24 Vdc (Typ)

Input terminal ratings

5 Vdc ÷ 48 Vdc

voltage each signal can support

Input resistance for GPIs

3 kOhm(Typ)

Output terminal ratings

0 ÷ 500 mA

overall for all external loads

Output breakdown voltage

60 Vdc

Input/output isolation


Relay nominal

5A , 240 VAC

Relay Max Switching Voltage

400 VAC

Relay Expected Life, Mechanical

15×106 cycles

Relay Expected Life, Electrical

1×104 cycles (at 5A, 250 VAC , 6 cycles/min)

Safety output current

Multifuse Polyswitch RKEF075

User interface

Green LED: power

Yellow LED: selected GPI/O information

IP rating


Operating Temperature

-20 to 60 °C


5 to 95% (on-condensing)


(W)100,5 x (L)131 x (H)34,4 mm3


200 g

RA0002 Technical Information Manual - Size: 2.05 MB
Revision : 2
RA0002 Data Sheet - Size: 463.72 kB
RA0002 CE Declaration of Conformity - Size: 502.62 kB
CAEN RFID Products Catalog 2020 - Size: 3.48 MB
RA0002 - Digital I/O Interface Unit
RA0002 - Digital I/O Interface Unit KIT
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