Endress+Hauser Proline Promass 80 - Read the primary process variable as current in mA and four (preset using Command 51) dynamic process variables

10 Group PULSE/FREQUENCY OUTPUT Device Functions Proline Promass 80
38 Endress+Hauser
OUTPUT SIGNAL
(contd)
Example for output configuration PASSIVE-POSITIVE:
Output configuration with an external pull-down resistance.
In the quiescent state (at zero flow), a positive voltage level is measured via the pull-
down resistance.
A0004689
m = Open collector
n = Pull-down resistance
o = Transistor activation in “POSITIVE” quiescent state (at zero flow)
p = Output signal level in quiescent state (at zero flow)
In the operating status (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 resistance.
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 resistance
o = Transistor activation in “NEGATIVE” quiescent state (at zero flow)
p = Output signal level in quiescent state (at zero flow)
In the operating status (flow present), the output signal level changes from a positive
voltage level to 0 V.
A0001981
Function description PULSE/FREQUENCY OUTPUT
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