Digital I/O - Emerson MCi210 User Manual

4.3

Digital I/O

The digital I/O circuits are isolated from the power circuits in the drive by basic insulation
(single insulation) only. The installer must ensure that the external control circuits are
insulated from human contact by at least one layer of insulation (supplementary
insulation) rated for use at the AC supply voltage.
WARNING
If the digital inputs or outputs are to be connected to other circuits classified as Safety
Extra Low Voltage (SELV) (e.g. to a personal computer), an additional isolating barrier
must be included in order to maintain the SELV classification.
WARNING
The MCi210 is equipped with 3 digital inputs, 1 selectable digital input or output and 1 digital output.
These inputs and outputs can be read to or controlled by the user program in the module.
The digital outputs are a positive logic arrangement with high side drivers only, such that they are at
+24 V when active and can supply a total maximum 20 mA of current shared between the two
outputs. When inactive they are effectively floating. The digital outputs are protected against short-
circuit or overload. The trip threshold is 20 mA, and if tripped both outputs will be deactivated and
the drive will show a "Slotx Error - Output overload" trip (where x indicates the slot number that
module is installed in).
The digital I/O are controlled using menu 4 in the module. Refer to section 5.9 Menu 4 - Digital I/
O on page 35 for more information.
4.3.1 Digital I/O specifications
1 Digital Input 1
2 Digital Input 2
3 Digital Input 3
4 Digital I/O 4 (when configured as an input)
Type
Maximum input voltage
Switching threshold
Load
4 Digital I/O 4 (when configured as an output)
5 Digital output 5
Type
Output voltage
Maximum output current
6 0 V common
Common to the 0 V of the host drive
12
Positive logic IEC 61131-2
±30 V
9.5 V ±0.3 V
>2 mA at 15 V
Positive logic
0 V to 24 V
20 mA (from one output only or shared between
both outputs)
MCi210 User Guide
Issue Number: 2