Connection and initial setup of MEXM devices with a Cortex unit

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 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 Cortex USB ports
  • The MEXM should be automatically detected. 
  • To check this, in the 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 Cortex USB port, in RTU mode
A MEXM unit detected in a 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 Cortex (rear panel)
  • In the 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 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 Cortex, in RTU mode. This setup saves rear Cortex USB ports
Two MEXM units detected in a Cortex.

RTU MODE (USB) – Multiple MEXM (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 Cortex USB ports
  • In the 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 Cortex USB ports
  • In the 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 Cortex, in RTU mode. This setup uses more Cortex USB ports
Two MEXM units detected in a 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 Cortex Ethernet ports
  • In the 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 Cortex Ethernet port, in TCP mode
A MEXM unit detected in a Cortex

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

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