Connection and initial setup of MEXM devices with a Davicom Cortex unit

Davicom Cortex units are able to use both RTU and TCP modes, simultaneously (if desired) to communicate with MEXM units (this feature is not available on the DV-200 Series units).

To add MEXM devices to a Davicom Cortex in RTU or TCP.

RTU MODE (USB) – One MEXM

  • Power-up the MEXM
  • On the MEXM, set the 8-position rotary selector switch to position 1(position 0 is reserved for TCP mode)
  • Connect a USB cable between the MEXM and one of the 4 rear Davicom Cortex USB ports
  • The MEXM should be automatically detected. 
  • To check this, in the Davicom Cortex top menu, go to Devices > MEXM and check that the MEXM is detected. If not, click on DETECT MEXM.
  • The MEXM unit will appear in the list.
Connecting a single MEXM to a Davicom Cortex USB port, in RTU mode
A MEXM unit detected in a Davicom Cortex

RTU MODE (USB) – Multiple MEXM (daisy chain)

  • Power-up the first MEXM
  • On the first MEXM, set the 8-position rotary selector switch to 1. Each MEXM selector switch must be set to a different position (position 0 is reserved for TCP mode)
  • Connect a USB cable between the MEXM and the Davicom Cortex (rear panel)
  • In the Davicom Cortex top menu, go to Devices > MEXM and check that the MEXM is detected. If not, click on DETECT MEXM
  • Power-up the second MEXM
  • On the 2nd MEXM, set the 8-position rotary selector switch to position 2. Each MEXM selector switch must be set to a different position (position 0 is reserved for TCP mode)
  • Using the provided RJ-9 telephone-like patch cable, connect this MEXM to the first MEXM
  • In the Davicom Cortex top menu, go to Devices > MEXM and check that this MEXM is detected. If not, click on DETECT MEXM
  • To add other MEXM devices, simply repeat these steps.
Connecting multiple MEXM in Daisy-chain to a Davicom Cortex, in RTU mode. This setup saves rear Davicom Cortex USB ports
Two MEXM units detected in a Davicom Cortex.

RTU MODE (USB) – Multiple MEXM (Davicom Cortex rear USB ports)

  • Power-up the first MEXM
  • On the first MEXM, set the 8-position rotary selector switch to 1. Each MEXM selector switch must be set to a different position (position 0 is reserved for TCP mode)
  • Connect a USB cable between the MEXM and one of the 4 rear Davicom Cortex USB ports
  • In the Davicom Cortex top menu, go to Devices > MEXM and check that the MEXM is detected. If not, click on DETECT MEXM
  • Power-up the second MEXM
  • On the MEXM, set the 8-position rotary selector switch to 2. Each MEXM selector switch must be set to a different position (position 0 is reserved for TCP mode)
  • Connect a second USB cable between the MEXM and one of the 4 rear Davicom Cortex USB ports
  • In the Davicom Cortex top menu, go to Devices > MEXM and check that this MEXM is detected. If not, click on DETECT MEXM
  • Repeat the steps above to add other MEXM devices
Connecting multiple MEXM units by USB to a Davicom Cortex, in RTU mode. This setup uses more Davicom Cortex USB ports
Two MEXM units detected in a Davicom Cortex

TCP MODE (Network)

  • Power up the MEXM
  • Set the communications-mode selector switch to position 0 (TCP)
  • Connect an Ethernet cable from the MEXM to one of the 4 rear Davicom Cortex Ethernet ports
  • In the Davicom Cortex top menu, go to Devices > MEXM, then click on DETECT MEXM
  • To add other MEXM, repeat the steps above.
Connecting a single MEXM unit to a Davicom Cortex Ethernet port, in TCP mode
A MEXM unit detected in a Davicom Cortex

Now that the MEXM unit(s) has (have) been detected, you can add the I/O points to your Davicom Cortex’s configuration. See this article for details on how to do this.

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