Monroe Electronics 639 - Manual (Page 4)

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Monroe Model 639 is an audio follow video switch, in 2 x 1 configuration, with the video portion
having a bandwidth of 0 to 950 MHz. Audio switching is provided by dry contact relays, with
full balanced stereo capability. The unit incorporates a timer programmed to control the
switch.
The video/rf connectors are ‘F’ type, and the audio connectors are detachable screw terminals.
The unit has an embedded ethernet controller, functioning as an addressable server.
Also provided is an input for a contact closure to ground (CTRL and GND) for manual control.
The unit has a manual ‘TEST’ switch, to allow the user to switch from primary to secondary as
long as the switch is depressed.
IF EITHER OF THESE TWO SWITCHES ARE CLOSED, [i.e, the TEST SWITCH IS DE-
PRESSED OR THE CTRL SCREW TERMINAL IS CLOSED - SHORTED TO THE GND
TERMINAL] THEY HAVE COMMAND OF THE SWITCH, AND NEITHER TIMED EVENTS
NOR REMOTE CONTROL OF THE SWITCH IS POSSIBLE. THIS PERMITS USE OF THE
SWITCH LOCALLY IF REQUIRED; i.e.. IF ETHERNET CONNECTION IS LOST SO THAT A
LOCAL OVER RIDE IS REQUIRED.
A ‘Reset’ switch returns the unit to its default state if necessary. The CD provided contains a
program to allow configuring of the included web server, as well as an instruction manual
describing its operation. Description of the operation is shown later, with ‘screen shots’ to
illustrate the sequence of operations.
The unit incorporates a real time clock, acccurate to better than 1 second per week, that may
be set or reset with time sources from the intranet (or internet) depending upon how the user
connects it. If a network time server is available on the ethernet connection where the 639
resides, the 639 may be set to update the clock daily for increased accuracy.
Up to 100 separate weekly events, and up to 20 separate dated events may be entered. The
unit stores the last 2000 events that have occured.
GENERAL DESCRIPTION