Extron electronic MLC 64 RS VC D, MLC 62 RS D NOTES Choose an Extron amplifier that is capable of

zz Port B IR/S (RS models) or Port A IR (IR models): Connect a display device, switcher, or up to two IR emitters to this port. On RS models, you can configure Port B IR/S for either serial or IR communication, using the MLC 60 Series configuration program. On IR-only models, Port A IR supports only an IR connection.

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GROUND Tx/IR

GROUND

Tx

GROUND +12 VDC

PWR PORT A PORT B 12V RS-232 IR/ S 0.4 A MAX

Ground ( )

IR Signal

50'

(15 m)

IR Emitter

MLC RS D Rear Panel

zz Relays port (RS models only): The Relays port provides connections for two relays. Connect one or two devices (such as a low-voltage controller and a motorized screen, shown in the example below) to this port. The relay ports are normally open and rated for 24 VDC, 1 A (see the example below).

NOTE: If you are using both relay ports, connect the ground wires of both devices to common pin 3.

		Tx	HOST/	CONFIG
		GROUND
		Rx	DIGITAL	INPUT
		1
		GROUND	RELAYS	N/O
		1
		COMMON
		2	B
		GROUND	PORT IR/S
		Tx/IR
MLC	RS	GROUND	232-RS
		D Rear Panel
		Tx
				X

		Power
		Supply
Pin:			Ground ( )
3	Ground ( )
2	Signal		110/220 V
1
		Low Voltage	Motorized
		Screen Control
			Screen

zz Digital Input port (RS models only) — The Digital Input port enables you to connect a switch or sensor to control other devices in the room that are connected to the MLC serial, IR, or relay ports. The port measures the high and low states of the connection between the switch or sensor and the connected device. For the voltage thresholds, a voltage below 1.0 VDC is measured as logic low, and a voltage above 1.5 VDC as logic high. When a threshold between the states is crossed (from high to low and vice versa), the selected action occurs.

By default, this port is configured with a 5 V pull-up for use with basic non-powered switches. If the device being connected has its own power source, configure the port to disable the pull-up mode (see the configuration program help file for port configuration procedures). To wire this port, see the example below.

Two-position Switch

GROUND	HOST/ CONFIG
Tx
Rx
		Pin:
GROUND	DIGITAL INPUT	2	Ground ( )
1		1	Digital Input
COMMON	ELAYS N/O
MLC RS D Rear2	Panel

zz Wire the volume control module (MLC 64 RS VC D only) — Connect the remote volume control port of an Extron amplifier to the 3-pole captive screw connector on the rear panel of the MLC 64 volume control module, as shown at right. No software configuration is required for this module.

In the illustration at right, A = ground, B = Volume and mute control, and C = 10 VDC reference voltage.

NOTES: • Choose an Extron amplifier that is capable of

remote volume control and muting. Not all

Extron amplifiers have remote volume control

ports. The MPA 122 or MPA 401 are examples of

the type of amplifier to use.

• Use shielded cable for audio connections to avoid inducing noise.

Vol/Mute
10V
			Amplifier
1	2	3		10 V
			Rear Panel
				Vol/Mute
				Ground

GND VOL 10V

A B C

MLC 64 VCM

Rear Panel

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