Ingeteam
These digital inputs can be configured for different purposes (see "18.16. Configuring the digital inputs") and
used with a potential-free contact or with a power supply, both outside the unit.
External potential-free contact
The truth table for these inputs is as follows.
Potential-free contact
Closed (R < 100 Ohm)
Closed (R > 100 Ohm)
Hardware type B
Digital input RES in hardware type B can only be configured as "COMANDO DRM0 (AS4777)" (see "18.16.
Configuring the digital inputs"). This input is required to comply with Australian Standard AS4777.2, where an
external device called DRED controls the unit through this connection.
44
Hardware type A
Digital Input 1
Digital Input 2
R
1+
1-
R
Connector
Open
Hardware type B
Digital Input RES
Digital Input 2
J54 DIGITAL INPUT 1
J54 DIGITAL INPUT 2
1+
1-
External power supply
Voltage level
5 V ~ 24 V
0 V
1 V ~ 5 V
J54 DIGITAL INPUT RES
J54 DIGITAL INPUT 2
ABH2013IQM01_C- Installation and Operation Manual
Connecting the digital inputs
+
V
-
CPU
"0"
"1"
X