LTDVE8CH-20 – INSTRUCTION MANUAL
12
Please note that LED7- and LED8- are not the same as 0V.
8.4. Input/output synchronization
Connector P6 is used for input and output synchronization and for serial RS485 communication.
There are eight independent, galvanically isolated, synchronization inputs. These inputs can be
connected directly to the system for voltages up to 24V. An external series resistor is not necessary.
Synchronization inputs may be left unconnected when not used. The state of each synchronization
input is shown by a green LED indicator next to the connector.
There are eight independent, galvanically isolated, synchronization outputs. These outputs can be
used, for example, to trigger a camera or a slave controller. These outputs can be connected directly
to the system for voltages up to 60V. The state of each synchronization output is shown by a yellow
LED indicator next to the connector.
Connector P6 also provides three signals for an isolated serial RS485 interface and two signals for an
optional and non-electrically isolated external temperature sensor. The activity of the serial RS485
interface is shown by a dedicated yellow LED next to connector P6.
See the following section for more information about connector P6.
8.4.1. Synchronization inputs
The eight synchronization inputs are available on the TR1+, TR1-, TR2+, TR2-, TR3+, TR3-, TR4+,
TR4-, TR5+, TR5-, TR6+, TR6-, TR7+, TR7-, TR8+ and TR8- terminals of connector P6. These
signals are listed in the
Table 7: pinout of connector P6 for synchronization inputs
. Be careful not to
cross-connect the eight synchronization inputs.
Pin number
Name
Description
1
TR1-
Input 1. Negative terminal
20
TR1+
Input 1. Positive terminal
2
TR2-
Input 2. Negative terminal
21
TR2+
Input 2. Positive terminal
3
TR3-
Input 3. Negative terminal
22
TR3+
Input 3. Positive terminal
4
TR4-
Input 4. Negative terminal
23
TR4+
Input 4. Positive terminal
5
TR5-
Input 5. Negative terminal
24
TR5+
Input 5. Positive terminal
6
TR6-
Input 6. Negative terminal
25
TR6+
Input 6. Positive terminal
7
TR7-
Input 7. Negative terminal
26
TR7+
Input 7. Positive terminal
8
TR8-
Input 8. Negative terminal