455-461 Series
Serial wiring diagram
For a 0-10 mA input, the input impedance of each unit is 1 Icc2.
The 10 V voltage is required by the unit at 10 mA.
For the 0-20 mA and 4-20 mA inputs, the impedance of an input is 250 O.
The voltage of each input is 5 V to 20 mA.
Control
signal
0 - 5 m A
0 - 1 0 m A
0 - 2 0 m A
4 - 2 0 m A
O
0 5
5
6
6
Unit
1
Unit
2
6
Unit
3
Figure 4.4,b S e r i a l inputs
Manual drive.
An external potentiometer can be connected between terminals 6 (0 V) and 12 (10 V) and the
mid-point at terminal 4 (see fig. 4.2, page 4-8).
Use a potentiometer of 5 to 10 k.Q.
The user can choose the input type (Analogue signal from a controller or other signal source
or Manual drive using an external potentiometer) by the switching shown in figure 4.3.
The "Auto" position (inverter or relay contacts) corresponds to an external drive and the
"Manual" position corresponds to a manual drive.
The "Manual" input range depends on the "Auto" input configuration (see "Configuration"
section).
Warning
If the input signal was not disconnected from terminal 5,
the 2 signals would be added.
451-461 User Manual
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