Mercury Series USB2.0 Cameras User Manual
29
4.8.3.
Connection Method of Cables
The MERCURY USB interface cameras have two types of trigger signals, one is positive voltage drive signal
and the other is negative voltage drive signal. Both the
High
and the
Low
which are described in the
software interface function and the demo, are based on positive voltage drive. When driven by negative
voltage, the polarity is reversed.
The MERCURY USB interface cameras use industry-specific connectors, see as the following
Table4- 7
:
Table4- 7 I/O Port definition (back sight of camera)
Figure
Pin
Definition
Description
1.
T
Hardware Trigger 1
2.
Reserve
Reserved
3.
Trigger -
Hardware Trigger 2
4.
Reserve
Reserved
5.
Not connected
Not connected
6.
Not connected
Not connected
7.
Strobe
Light Source Control Output
8.
ExtVCC
External Power Supply
4.8.4.
Trigger Filtering
In order to suppress the interference signal during external triggering, the MER series camera has designed
trigger filtering function, including rising/falling edge filter. The
set range
is
0us - 1ms
,
step: 100us
. If the
value of rising edge filter is set as 1ms, then the rising edge pulse width which less than 1ms will be filtered
out, and the camera will not be triggered.
4.8.5.
The User Data Encryption Area
The user data encryption area is designed to protect the user’s self-owned intellectual property rights.
Users can define it by themselves. When the user data encryption area can be accessed, the ordinary
parameters are used, if the user data encryption area is not accessible, the user must use a secret key to
open it. The users can be more closely tied to their software through the data encryption area, then to
improve the difficulty of decryption and protect their self-owned intellectual property.
The user data encryption area can be accessed when the camera leaves the factory. How to use it please
contact the support engineer.
