E110-P
User Manual
FW_E110-P_M_v0301-01_EN
Page 45
6.4.4
VOLTAGE SELECTION SENSOR SUPPLY
Type PB / PX – Pickup element supply
Terminal S3 provides a limited supply voltage of 3.2 VDC (coil signals 1.2 V) for the flowmeter signal
output. Output impedance is 2700 ohms and power is limited to 3.3 mW under short circuit
conditions.
Limited power
This voltage MAY NOT be used to power the flowmeter electronics, converters, etc. as it will not
provide adequate sustained power! All energy used by the flowmeter pickup will directly influence
battery life (type PB). It is strongly advised to use a “zero power” pickup such as a coil or reed-
switch when operating without external power. You can use some low power NPN or PNP output
signals, but battery life will be significantly reduced (consult your distributor).
Type PD: Sensor supply: 8.2 VDC – 12 VDC or 24 VDC (Vin P2 minus 1 V)
This option provides a supply derived from the input supply. Adjust the P3 output voltage using
switches J1 and J2 on the bottom rear of the MEM (Main Electronics Module) - see following figure.
V input - 1V DC
8.2VDC
12VDC
J1
J2
J1
J2
J1
J2
on
off
Fig. 29:
Voltage selector switch (terminal connector P3)
Power supply 10 – 30 V DC (OFF = right position)
J1
J2
External sensor supply voltage
Required supply voltage
ON
ON
8.2 V DC (max. output 20 mA)
9 – 27 V DC
ON
OFF
12 V DC (max. output 30 mA)
13 – 27 V DC
OFF
OFF
Supply voltage - 1 V DC (max output 75 mA) Up to 27 V DC
Power overload
The sensor supply is protected against a power overload but an overload may affect the functionality
of the unit (i.e. shutdown).
