Endress+Hauser Proline Promass 83 - Page 76

7 Block OUTPUTS Device Functions Proline Promass 83 MODBUS RS485
76 Endress+Hauser
OUTPUT SIGNAL
(continued)
4207 In the operating status (flow present), the output signal level changes from 0 V to
a positive voltage level.
A0001975
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
(continued on next page)
Function description
OUTPUTS → PULSE/FREQUENCY OUTPUT 1 → CONFIGURATION (FREQUENCY)
U (V)
t
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