Sentera Controls DPD-F-10K, Mounting And Operating Instructions

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Fig. 4 Connecting with accessories
Application 1: Measuring differential pressure [Pa] or
volume flow [m³/h] using PSET-PVC
Application 2: Measuring volume flow [m³/h] or air velocity [m/s]
using PSET-PT
DPD
+ _
DPD
+ _
Sensor module 1
+ -
Sensor module 2
7. Connect the nozzles with the tubing.
8. Switch on the power supply.
For sensor calibration and Modbus registers reset procedures, refer to section
“Operating instructions”.
NOTE
PWM voltage selection:
■
When the internal pull-up resistors (JP1 for sensor module 1 and JP2 for sensor
module 2) are connected , the voltage source is set via Modbus holding register 54
for sensor module 1 and holding register 74 for sensor module 2, i.e. 3,3 VDC or
12 VDC. See
Fig. 5 Pull -up resistor jumpers.
Fig. 5 Pull-up resistor jumpers
JP2 JP1
■
When JP1 and JP2 are disconnected, the output type is Open collector. See Fig. 6
PWM (Open collector) connection example.
■
Only when JP1 and JP2 are not connected and the analogue outputs (AO1 and
AO2) are assigned as PWM output (via holding registers 54 and 74 - see the
Modbus Map), external pull-up resistors are used.
DUAL DIFFERENTIAL PRESSURE
TRANSMITTER WITH DISPLAY
DPD