MultiTrode MultiSmart Installation & Operation Manual page 47

Pump station manager & rtu
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MultiSmart Installation & Operation Manual
7.3.3
Digital Volt-Free Outputs
The pump control I/O board has seven 240V, 5A, and digital volt-free outputs:
Figure 44 – Digital Volt-free Outputs
NOTE:
DO1-4 are configured by default if 3 pumps were selected during the Setup Wizard. For a
system which has less than 3 pumps, only the relevant digital outputs are configured. (For 4
pumps or more, no digital outputs are configured).
NOTE:
MultiTrode recommends that snubbers are fitted to the contactor coils that the digital outputs
are driving.
7.3.4
Analog Inputs
The pump control board has two isolated 4-20mA analog inputs.
Figure 45 – Analog Input –
External Excitation: 2-Wire
MultiSmart_IO_Manual_R20
DO 1-4 – Isolated voltage free contacts
DO 5-7 – Common rail voltage free contacts
Multiple sources can be assigned to a digital output with the option of AND, OR and XOR
operations performed on the source
Maximum Load (Input Impedance) – 120 ohms
Resolution 0.2%
Isolated
Figure 46 – Analog Input -
External Excitation: 3-Wire
Page 47 of 260

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