CM2904 Instruction Book © 2009 - 2022 Parker-Hannifin Corporation Page 16 of 51
Hardware Specifications
Input descriptions
5.2.2. Multifunction Digital Inputs (MDIN)
Multifunction digital input hardware specifications are described below. Usage of these
inputs are decided in software.
MDIN 1…4 are actually used as analog inputs having measurement range from
0…32000mV, while MDIN5…19 are used as digital inputs having currently 3 states in
use in the application software.
Refer to chapter 6.3.2 for use of MDIN 1..4 and to chapter 6.3.1 for use of MDIN
5…19.
The following table provides specific details for this digital input type:
Table 6: Digital multistage input specifications
Element
Min
Nom
Max
Unit
Count
20
pcs
Input voltage range
0
32
V
Pull-up voltage 24V system
2,6
V
Pull-up voltage 12V system
2,6
V
Short to ground
0
1
V
Open wire (no connection)
2,1
3,1
V
+5V reference
4,5
5,5
V
+8V reference
7,5
8,5
V
Short to battery
9
V
Cuttoff frequency
100
Hz
Over-voltage
38
V
Reverse protection
-26
V
Resolution
32
mV
Accuracy
2
%
N
OTICE
Currently the states used for MDIN5…19 are following
Open
=
OFF or “0”
+5V reference
=
ON or “1”
Any other state =
+8Vreference / Short to battery/Short to ground
=
error
5.2.3. Frequency inputs
•
Input works in this configuration with NPN type sensors
•
No open wire detection for sensor
•
If used critical signals, normally closed - sensor type should be used
