Connecting MXB modules to an EXRCPU/EXRLCPU
An EXRCPU/EXRLCPU can be used to control and process data from multiple MXB modules to include other transducers such as voltage, current, bridge and thermocouple. MX modules can be connected directly to the EXRCPU/EXRLCPU or through one or more EX23-R Ethernet switches.
NOTE
The EXRCPU/EXRLCPU automatically configures the MX module network address and checks for firmware updates. If necessary, install new MX firmware before continuing. Do not reboot the EXRCPU/EXRLCPU when MX firmware updates are in progress.
CAUTION
When using FireWire to power MX modules, make sure that all modules have an Ethernet connection to the EXRCPU/EXRLCPU layer or EX23-R switch. Failure to do so may cause undetected synchronization errors in all linked MX modules.

- Connect the EXRCPU/EXRLCPU layer, EX23‑R modules and MX modules to a power supply.
NOTE
When designing the power system, note that increased cable lengths can produce significant voltage drops at the module connectors, especially when using PoE or powering multiple modules from one source.
NOTE
MX modules may also be powered in serial using FireWire connections. Refer to the MX Modules User Manual for details.
- Use a 1‑KAB2107 cable to connect the EXRCPU ETH 1 or EXRLCPU E1 connector to the EX23‑R switch, as shown in the diagram.
NOTE
For optimal data throughput performance, do not use both EXRCPU Ethernet ports when using EX23‑R modules. To use multiple EX23‑R modules, connect any Ethernet port on the new EX23‑R module to any open EX23‑R Ethernet port.
NOTE
For a EXRCPU/EXRLCPU to EX23-R and EX23-R to EX23-R connection use the Gigabit Ethernet ports (10/100/1000, Ports 1 to 4 or Ports 7PoE to 10 PoE) on the EX23-R.
- Use 1‑KAB2100 cables to connect the MX module X100 connectors to the EX23‑R switch.

Do not reboot the EXRCPU/EXRLCPU when MX firmware updates are in progress.