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![](https://files.manualsfile.com/54577619-ds-k3b501sx/bg25.png)
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The alarm output supports relay output.
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For any requirements, the door lock can control the door
barrier status of the third party. D1 controls the barrier
opening for entrance, while D2 controls the door opening for
exit. For details, see Barrier Control Relay Output Mode.
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C3 and C4 in the event input can also be people counng
interface. C3 controls people counng for entrance, while C4
controls people counng for exit. When the access control
board detects signals in C3 and C4, the people number will be
accumulated. For detailed informaon about people counng
and people number, see Conguring People Counng
Parameters in User Manual of iVMS-4200 AC Client Soware.
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For detailed informaon about the DIP switch, see DIP Switch
Descripon.
5.5.4 Access Control Board Serial Port ID
Descripon
You can use the jumper cap on the access control board to switch
the interface communicaon mode. For details about switching
between RS-232 and RS-485 communicaon type, see Switching
RS-485/RS-232 Mode.
Figure 5-8 Access Control Board
According to the picture above, the RS-485 serial port
corresponds to UART2 and UART3. RS-232 serial port is
22
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