OR8/R8
Page 2
1
Connections and pin assignments
The available connections and different components of the R8 and OR8 boards are shown in the
following figure of the board (view on top of the board (fitted with components), Sub-D connector on
the right).
1.1
Power supply
The R8 is supplied with 5V DC at the screw-clamp terminal, the OR8 can
be operated with 9..40V as well as with 5V (factory setting: 9..45V,
jumper open).
1.2
Optocouplers (OR8)
Connect the signal source (5..30V DC) to the screw
terminals IN1..IN8. The resulting output signal (TTL) is now
available at the 25-pin Sub-D male connector.
•
Please carefully observe the polarity! Only apply voltages within the adjusted range!
•
It is very important to turn the direction of the port packages to input, when connecting the OR8 to
the USB-PIO! Otherwise the cards might be damaged!
1.3
Relays (OR8, R8)
The responding of the relays OUT1..OUT8 depends on the applied
input level (TTL) at the 25-pin Sub-D male connector.
The R8 provides one-way switches with 2-pin terminals for the
relays, whereas the OR8 is equipped with two-way switches,
realized as 3-pin terminals. Therefore the circuit is always closed at
one of the upper two contacts (see figure on the right).
Do not apply any voltages higher than 60V at the relay contacts! Max. current: 6A.
