Development and production of systems for measurement and control
4.3. RS485
The PLA44 has built-in one RS485 interface supporting Modbus RTU protocol. Connection of the RS485 bus to the
device is on the separate terminal by two wires A and B. Shielding is not required.
PLA44 does not have built in any terminal resistor.
4.4. Ethernet
The configuration of Ethernet are defined by the network administrator and have to be set on the PLA44
correspondingly. If the network configuration is not known, the Ethernet cable should not be plugged into the device.
4.5. USB
Device has one USB interface of type B. USB interface is a standard HIT so there is no special driver needed to be
installed at PC for activating the communication and data transfer.
4.6. Temperature sensor
Temperature sensor is connected directly to PLA44 inputs 20 and 21 according to the picture 2. The sensor is NTC
type with resistance 10kΩ / 25°C.
4.7. Digital inputs / outputs
The instrument is equipped with two opto-isolated transistor outputs inputs. The outputs working mode is fully
adjustable as an alarm output, remotely controlled output or pulse output.
Picture 3: input / output connection
5. Operation
PLA44 allows comfort operation by easy graphic Main menu which is divided to groups of related features and
functions. For the navigation in menu us the cursor buttons ▲ and ▼. To enter the selected menu or parameter press
button
SET
. Returning back to previous menu or parameter level press button
ESC
.
BMR
trading
Horní lán 17
779 00 Olomouc
Czech Republic
6
Tel: +420 778 066 566
www.bmr-trading.com
