24
Manual – Controllers DHE/DHF/DHR21B (standard) and DHE/DHF/DHR41B (advanced)
4
Installing the DH.21B/41B option
Assembly and Installation Notes
4.7.2
Connecting binary inputs and outputs (X31 terminal)
Terminal X31 provides eight binary inputs or outputs (e.g. for controlling external
actuators/sensors).
Binary inputs
•
The binary inputs are electrically isolated by optocouplers.
•
The permitted input voltages are defined according to IEC 61131.
+13 V – +30 V = "1" = contact closed
–3 V – +5 V = "0" = contact open
Binary outputs
•
The binary outputs are electrically isolated by optocouplers.
•
The binary outputs are short-circuit proof but not interference-voltage-proof.
•
The maximum permitted output current is 150 mA per binary output. All eight binary
outputs can be operated simultaneously with this current.
•
To prevent dangerous voltage peaks from occurring, do not connect inductive loads
to the supply voltage or the binary inputs or outputs without free running diodes.
Cable specification
•
Only connect cables with a minimum core cross section of 0.25 mm
2
(AWG23) and
a maximum core cross section of 1 mm
2
(AWG18). Clamping without conductor end
sleeves is possible in accordance with IEC 60999.
•
Choose the type and core cross section of the connected cable in dependency of the
required cable length and the load expected from your application.
For more information on binary inputs or outputs, refer to the "Technical Data" chapter.
2102458763
X31
1
3
5
7
9
2
4
6
8
10
NOTICE
The supply voltage must be present on X31:1/2 when using binary inputs and outputs.
The DH.21B/41B option might be damaged. In this case, the specified function of the
binary inputs and outputs is no longer ensured.
If the supply voltage is switched off, you must switch off all other voltages at X31:1 to
10, e.g. DC 24 V of switches and sensors at the binary inputs.
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