User's Manual

Table Of Contents

MReX Transceiver User Manual v1.92 Firmware

Output Handling

Note: Please refer to Input Output Hardware Connection section on this manual for ex-

amples of how to connect the input and output pin on the MReX board.

All inputs can be configured to be outputs. Input/Output 1 additionally drives a separate open col-

lector output pin to control loads of up to 100mA. All outputs operating from input pins have a 1K

output impedance sourcing a maximum of 3.3mA.

There are 2 additional LED output pins. These are both open drain, allowing LEDs to be driven up

to 100mA from a source voltage of up to 12V.

Outputs are configured using the commands:

*OUT_CONFIG

*UNIT_ID

The outputs are controlled through messages received that conform to the WTE output control

protocol.

NOTE: Inputs can be configured to operate at the same time as outputs, allowing prepro-

grammed input messages to be transmitted when a message has been received to change the

state of an output.

OUTPUT PIN HARDWARE

The MReX output pin can sink a maximum of 50mA. If a larger load need to driven from this pin a

current/voltage driver must be connected to the MReX module. Please refer to Input Output

Hardware Connection section of this manual.