Crestron MC2E 2-Series Professional Media Controller
ERR
This LED illuminates when an error condition is detected. This may be the result of
hardware or software failure, or a programming error. To determine the actual error
condition, examine the message available through the Crestron Viewport command
Functions | 2-Series | Error Log.
LNK (LAN)
This LED illuminates when there is a connection to the rear panel LAN port.
ACT (LAN)
This LED illuminates when there is communication (activity) at the rear panel LAN
port with an Ethernet network.
Ports
The MC2E rear panel ports are illustrated and described below.
NOTE: Interface connectors for the NET, Infrared-Serial, I/O, and Relay Output
ports are provided with the MC2E.
IR SERIAL OUT
SG S G SG S G

IR SERIAL OUT

ABC D
This connector provides four ports for IR TTL level or serial interface. Each output is
labeled S (signal) and G (ground). Infrared output is rated up to 1.2 MHz, at data rates
up to 115K. An individual UART on each port allow simultaneous firing of all ports.
Serial protocols include one-way RS-232.
NOTE: Transmission levels on the infrared – serial output connectors are in the 0 to
+5VDC range, which may not be compatible with all RS-232 devices.
NOTE: A port can be used for either IR or RS-232 communication, not both.
IR IN
IR IN
T R S
This connector provides a 3-position mini connector for use with the CNXRMIRD
Infrared (IR) Detector. It is used to receive standard RC5 IR codes (such as those
transmitted by the Philips Pronto, and many universal remotes) as well as codes from
certain devices manufactured by Sharp Electronics Corporation.
The RC5 code is a 13-bit code that has a 5-bit group, 7-bit command group and 1
stop-bit. It contains a bit to distinguish between start and repeat codes. The RC5 code
has a uniform duration of all bits. A transition in the middle of the time interval
assigned to each bit encodes the logical value. A '0' is encoded by a high to low
transition and a '1' by a low to high transition. This is also called a 'bi-phase' code.
The CNXRMIRD that ships from Crestron requires some modification before use
with the MC2E. THE CNXRMIRD ships with a mini phone jack that cannot be used
with the 3-position connector on the IR IN port of the MC2E. To modify the
CNXRMIRD to connect to the MC2E:
1. Snip the mini phone jack from the CNXRMIRD.
Operations Guide – DOC. 6142 2-Series Professional Media Controller: MC2E • 5