D-Link DVS-301 User Manual page 9

Video Server provides a very flexible general I/O interface to combine with the user's security
devices such as sensors, alarms, lighting or door locks. The general I/O terminal block has six
pins for device control. These pins can be divided into two categories based on their functions,
including RS485 and digital inputs and outputs.
If the device connected to COM has an RS485 interface, wire two control lines to pin 5 and pin 6.
After switching to RS485 on the configuration page, the PTZ control commands will be directed
through pin 5 and pin 6. If the distance from the controlled device is too far to allow accurate
function, an external power source may be used to pull high the RS485 signal.
Video Server provides one digital input and one relay switch. Pin 1 and pin 2 can be connected
to external sensor and the state of voltage will be monitored according to the programmed
scripts in configuration. The relay switch can be used to turn on or off external devices.
Status LEDs
Each time Video Server starts, it will perform a Power-On Self Test, abbreviated as POST
hereafter, to examine every hardware module. As soon as the administrator plugs in the power
adapter, both LEDs under the network LED will flash one by one until the POST is done. If any
module fails, both LEDs will indicate to the users the error according to the pattern listed in
Appendix A. If the result is good, both LEDs will turn off for a while and then follows the pattern
below. Network interface depends on the peripherals including Ethernet UTP cable, modem or
null modem cable. If the Ethernet cable between Video Server and Ethernet hub is good, Video
Server will choose the Ethernet network. If Ethernet is unavailable but a operational modem is
connected, the network interface will be PPP with modem. If either of the above is not the case,
Video Server will try the interface of PPP with null modem.
Network Interface Condition
Ethernet before installed
DVS-301 User Manual v1.00
Building Networks for People
LED2 (Heartbeat) LED3 (Status)
OFF
3
OFF