KROHNE Altosonic III, Installation And Operating Instructions Manual

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ALTOSONIC III 12
3.6 Electrical
connection of
the signal
inputs and
outputs
The terminal to connect the electrical signal inputs
and outputs consist of 6 connections. For wiring of
the signal inputs and outputs it is advised to use
unshielded twisted pairs.
Terminal Function Specification
⊥ Common ground -
P1 Pulse output 1, passive open collector output. Pulse
output to flow computer for volume counting.
Function can be set via menu option. I
max
: 150 mA
U
max
: 32V DC, 24V AC
Max frequency: 1,5 kHz
P2 Pulse output 2, passive open collector output. 90° or
180° phase shifted from P1. For pulse fidelity checking
P1 and P2 should be connected to 2 separate inputs of
a flow computer.
Function can be set via menu option.
I
max
: 150 mA
U
max
: 32V DC, 24V AC
Max frequency: 1,5 kHz
S Status output. Function can be set via menu option
3.5.0. I
max
: 150 mA
U
max
: 32V DC, 24V AC
I/C Current output (I), 0(4) to 20 mA
Passive open collector current sink output. Digital input
(C)
Function can be set via menu option 3.4.0. and 3.6.0. Current output (I): I ≤ 22 mA,
R
load
≤ 680 Ohm. U
max
= 15V DC.
Digital input (C): low = 0-5 V DC, high = 15-32 V DC.
Will be switched off when current output activated.
The electrical input and output signals can be connected in passive mode. Please observe instrument polarity:
current (I) is always flowing towards P1, P2, S, I/C, terminals (current sink).
3.7 Connection
diagram
examples
Pulse output, P1,
P2
For supply:
U
≤ 32V DC, ≤
24V AC
Status output, S
For supply:
U
≤ 32V DC, ≤
24V AC