max
min
I
U
R
b
=
-
MSRq
36//?
Q
ELB
MSRq
36//?
Q
ELB
P
*S[
G
fZq
Digital input states, optocoupler
An optocoupler is present on each digital input. The
inputs are electrically isolated from the other parts of the
circuits of the
IBT
100, Supply and Evaluation Instrument.
Logic state 1 or
High
:
3.5 V … 30 V.
Logic state 0 or
Low
:
≤
0.8 V.
Digital output states, electronic relay
An electronic semiconductor relay is available for each
digital output. These are electrically isolated from the
other parts of the circuits of the
IBT
100 instrument.
Logic state z or high-impedance:
Relay opened.
Logic state 0 or Low:
Relay closed.
An open semiconductor relay does not have any unique
logic level (state z for this reason). By connecting an
external pull-up resistor R, the logic state 1 or
High
is
created. The pull-up resistor is not part of the
IBT
100
instrument.
With R, state z becomes state 1.
The pull-up resistor R is connected to a voltage source;
this connection can be made on Pin 7 of the internal 24V
voltage source of the
IBT
100, Supply and Evaluation
Instrument.
The maximum current consumption I
max
of each digital
output is 100 mA. The resistor must be dimensioned
accordingly:
Page 20
Summary of Contents for IBT100
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