July 2013 3.17 Analog PLC inputs/outputs 285
3.17 Analog PLC inputs/outputs
Specifications:
Analog inputs Voltage range: –10 V to +10 V
Input resistance: > 40 kΩ
Resolution: 10 mV
Analog outputs Voltage range: –10 V to +10 V
Load impedance: > 5 kΩ
Ουτπυτ χυρρεντ: < 2 μΑ
Resolution: 10 mV
Inputs for Pt 100
thermistors
Measurement current: 2.25 mA
Temperature range: –4 °C to 120 °C (0xF230 to 0x0000)
Resolution: 0.002 °C
The interfaces of the PLA-H 08-04-04 module are electrically separated
from the 230 V line power in accordance with EN 50178.
Sensors and external devices that are connected to the PLA-H 08-04-04
module must be supplied exclusively either with 24 V NC or with 24 V PLC.
The inputs and outputs of the module are not galvanically isolated internally.
In the HSCI system, the two supply voltages must not be connected with
each other, however.
Sensors and external devices that are connected to the PLA-H 08-04-04
module and are supplied with 24 V NC must have double basic insulation.
If the module has not been correctly configured with the IOconfig software
for PCs or if errors occur during measurement (measuring range exceeded,
broken cable, loose connection, etc.), the module transmits the value 0.000
V for voltages or 120 °C for temperatures to the control, along with a
diagnostic message. To avoid excessive temperature measurement
values, these 120 °C values must not be taken into account in averaging
the measured values. For values below the measuring range, the module
transmits the value –4 °C to the control.
To Next Page
Loading...
