pg. 24
Relay Ports
• Connectors are labeled A and B
• These relays are independently controlled, isolated and normally open
• The relay contacts are rated for a maximum of 1 A @ 0-24 VAC or 0-28 VDC (resistive load)
• If desired, a metal connector strip is provided to distribute ‘common’ among multiple relays.
I/O Ports
Configurable as voltage sensing or digital output
Individually configurable I/O
• Each pin is individually configurable as a voltage sense input or a digital output
• Threshold settings are available to determine the high/low points for the digital input and the required voltage
change to generate an update
• Digital Output can push or pull 100mA
IR/SERIAL Port
Configurable as IR control emulation or 1-way serial
IR/S Port Pinout – MU-2300 & MU-3300 lower port
• Each pair is configurable as IR or 1-way RS-232
• Baud rates for RS-232 are limited. Maximum Baud is 19200 in DATA mode
• RS-232 voltages are 0-5v, not +-12v. This limits the maximum distance based on the cable resistance to <10 ft
• IR carrier frequency up to 1.142 MHz
• All ports can be used simultaneously
• These ports accept an IR Emitter (CC-NIRC) that mounts onto the device's IR receiver window
IR/S Port Pinout – MU-3300 upper port