Endress+Hauser Proline Prowirl 73 - Page 125

Proline Prowirl 73 Description of device functions
Endress+Hauser 125
OUTPUT SIGNAL
(continued)
Example for output configuration PASSIVE-POSITIVE
Output configuration with an external pull-down resistor. In the quiescent state (at zero
flow), a positive voltage level is measured via the
pull-down resistor.
A0004689
m
Open collector
n
Pull-down resistor
o
Transistor activation in "POSITIVE" quiescent state (at zero flow)
p
Output signal level in quiescent state (at zero flow)
In the operating state (flow present), the output signal level changes from a positive
voltage level to 0 V.
A0001981
Example for output configuration PASSIVE-NEGATIVE
Output configuration with an external pull-up resistor. In the quiescent state (at zero
flow), the output signal level at the terminals is at a positive voltage level.
A0004690
m
Open collector
n
Pull-up resistor
o
Transistor activation in "NEGATIVE" quiescent state (at zero flow)
p
Output signal level in quiescent state (at zero flow)
In the operating state (flow present), the output signal level changes from a positive
voltage level to 0 V.
A0001981
Function description, PULSE, FREQUENCY, STATUS group
U =30VDC
max
op
+
U (V)
t
U (V)
t
m
n
U (V)
t
U =30VDC
max
+
U (V)
t
U (V)
t
o
p
m
n
U (V)
t