Series 3000
Model R-174A
Audio/Video – IF/RF Relay Panel
DTMF Controlled
Monroe Electronics
100 Housel Avenue
PO Box 535
Lyndonville NY 14098
585-765-2254 fax: 585-765-9330
monroe-electronics.com
2
TABLE OF CONTENTS
Warranty Page 3
Description Page 4
Specifications Page 5
Installation Page 6
Operation Page 7
Programming DTMF Codes
Frequency Chart Page 9
Page 8
The following accessories are included with this unit:
Instruction Manual
427A Power Supply
3000R/22M Rack Mounting Kit
Phone cables
Specifications and design subject to change without notice.
P/N 1340199 Rev 011205
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WARRANTY
Monroe Electronics, Inc. warrants to the owners, each instrument and sub-assembly
manufactured by them to be free from defects in material and workmanship for a period of one
year after shipment from factory. This warranty is applicable to the original purchaser only.
Liability under this warranty is limited to service, adjustment or replacement of defective parts
(other than fuses or batteries) on any instrument or sub-assembly returned to the factory for this
purpose, transportation charges prepaid.
This warranty does not apply to instruments or sub-assemblies subjected to abuse, abnormal
operating conditions, or unauthorized repair or modification.
Since Monroe Electronics, Inc. has no control over conditions of use; no warranty is made, or
implied as to the suitability of our product for the customer's intended use.
THE WARRANTY SET FORTH IN THIS ARTICLE IS EXCLUSIVE AND IN LIEU OF ALL OTHER
WARRANTIES AND REPRESENTATIONS, EXPRESSED, IMPLIED OR STATUTORY
INCLUDING, BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. Except for obligations expressly undertaken by Monroe Electronics, in this
warranty, Owner hereby waives and releases all rights, claims and remedies with respect to any
and all warranties, express, implied or statutory (including without limitation, the implied
warranties of merchantability and fitness), and including but without being limited to any obligation
of Monroe Electronics with respect to incidental or consequential damages, or damages for loss of
use. No agreement or understanding varying or extending the warranty will be binding upon
Monroe Electronics unless in writing signed by a duly authorized representative of Monroe
Electronics.
In the event of a breach of the foregoing warranty, the liability of Monroe Electronics shall be
limited to repairing or replacing the non-conforming goods and/or defective work, and in
accordance with the foregoing; Monroe Electronics shall not be liable for any other damages,
either direct or consequential.
RETURN TO FACTORY POLICY
Materials returned to Monroe must have a Return Material Authorization number. To obtain an
RMA number, contact our A/V Switching & Control Customer Service at 585-765-2254 or fax
585-765-9330. Customers have 30 days to determine that the product ordered fills their need
and performs as described in Monroe’s literature. Units returned for approved repair or credit,
must be in the original packaging including all parts and paperwork plus be in very good
physical condition. If not, the customer is billed the cost to refurbish the unit and for missing
accessories and merchandise. No products may be returned for exchange or credit after 12
months of the shipment date. Monroe reserves the right to repair or replace units under
warranty.
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DESCRIPTION
Monroe Series 3000, Model R174A Audio/Video-IF/RF Relay Panel will switch any combination
of baseband audio follow video and IF/RF frequencies from 0 to 950 MHz.
The unit contains high quality RF and Audio relays capable of more than 100,000 operations
without failure.
“BNC” connectors are used for the video and IF/RF signals and screw terminals for wiring the
baseband audio signals.
Each of the four (4) switch sections contains a DTMF decoder that may be used for automatic
switching of the section by a control tone sequence selected by the user. The sequences could
come from networks, satellite providers or other programmers.
Switches can be controlled by DTMF (cue tones), contact closure, or an RS-485 command from
a computer. Up to 15 pf these units may be connected via RS-485 to one control computer.
Priority of switching is described in the installation instructions.
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RF Isolation
> 60 dB @ 950 MHz.
Attenuation
+/- 1 dB 0 to 750 MHz
See Attached Frequency Charts on page 9.
Power
90 – 260 AVC, 47-63Hz: 12VDC output - supplied
Control Inputs
Contact Closure
Absolute Maximum Input Voltage 5 VDC
Logical High Input Voltage 3.5 VDC Minimum
Logical Low Input Voltage 1.5 VDC Maximum
Serial Input
Each unit (up to 15 maximum) is individually addressable
RS-485, 2 wires plus ground
SwitchWare2 software, Windows based
DTMF Tone Input
Unbalanced, 10k impedance input
1 for each switch assembly
Control Output
Single open collector to ground, 30 Volt 30 mA
1 for each switch assembly
Physical
3.5” H X 3” D X 19” W, 1 Rack Mount
SPECIFICATIONS
WARNING:
The audio input jacks – RJ11 4/4 – on the rear of the unit are intended
for audio input only. Do not connect a telephone line to them. It will
damage the unit and void the warranty.
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INSTALLATION
Mounting:
The R174A requires a minimum of 3.5 vertical inches of space in a standard 19” wide EIA
equipment rack. Slide the unit into the rack frame and secure it, using the 3000R/22M
mounting hardware supplied with the unit.
Connections:
1. The Video (or IF/RF) switches are mechanical relays. Connections to them
are made through 75Ω BNC connectors on the rear of the unit. Connect your
cable for the default signal to the NC (normally closed) connector. Connect
your cable for your alternate signal - which you will substitute for the default
signal - to the NO (normally open) connector. Connect the cable to your modulator
or other destination to the COM (common or output) connector.
These connectors will switch either video signals, or may alternately be used to
switch high frequency signals, such as IF or RF. The frequencies useable are
shown on the frequency response charts included.
It is also permissible to use some relay sets for baseband video and some
for high frequency, since all switch modules are isolated.
2. If the signals being switched are baseband audio follow video, with audio following,
connect the audio signals to screw terminals of the same switch set, ensuring that the left
and right channels for the default audio are connected to the L NC 1 and 2, and the
R NC 1 and 2, and the signals for the alternate signal are attached to the L NO
1 and 2 and the R NO 1 and 2 connectors. The L OUT 1 and 2 and the R OUT
1 and 2 are routed to the modulator or other destination of the audio signals.
3. If you are using the unit with a contact closure switcher, connect the switch
for each Relay Unit to the connector for Contact Closure as appropriate.
4. If you are using the unit with the optional SwitchWare2 control software,
refer to the SwitchWare2 manual to connect the RS485 wiring to it’s
connector, and set the appropriate unit code.
5. Connect the +12 VDC lead (white) from the power supply provided with the unit
to the +12V terminal on the POWER connector, and the black lead from the power
supply to the GND terminal. Plug the model supply power outlet, and the unit is ready to
function.
6. To connect the audio DTMF tones to the individual switch, attach the supplied cable
assembly to the RJ-11 4/4 connector. (if 2 cables are supplied terminated with RJ-11
connectors on each end they must be cut in half and the wires stripped before hook up.)
Refer to the wiring diagram on page 7 in this manual for hook-up information. DO NOT
CONNECT A TELEPHONE LINE TO THE JACK. IT WILL VOID THE WARRANTY
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OPERATION
GROUND
The 2 x 1 relay sets may be switched three ways: By using a DTMF signal programmed into the
included decoder for each switch assembly. By means of the contact-closure inputs on the
control screw terminal. Or, by using Switchware software on a PC, through an RS-485 circuit.
Switching priority is from contact closure first, RS-485 second, and DTMF third. This means
that if the contact closure is used, the switch may be turned on or off no matter what the other
controls do. If the RS-485 is used, it supercedes DTMF on or off commands.
When the unit receives a DTMF control sequence a 250 mS pulse is output as closure from
SWTICH to GROUND (refer to drawing below). This allows activation of a VTR or other device
as desired.
Switching time is <30 mS.
AUDIO IN
SWITCH
GROUND
GROUND
GROUND
AUDIO IN
SWITCH
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PROGRAMMING DTMF CODES
1. Obtain a standard Touch Tone telephone set.
REMEMBER, DO NOT CONNECT THE TELEPHONE LINE TO THE R174A
CONNECTORS. IT WILL DAMAGE THE UNIT AND VOID THE WARANTY.
CONNECT ONLY A STANDARD TOUCH TONE TELEPHONE SET, ALONE.
2. Using a standard double-ended RJ-11 connector equipped cable, plug into the
telephone set and then into the R-174A connector for the switch to be programmed.
3. While listening to the handset, hold down the # key for 3 seconds until the unit clicks
once. Then release the # key.
4. Press and hold the * key for 3 seconds until the unit clicks 3 times. Then release the
* key.
5. Enter the number of digits (1 - 4) for the On/Off code.
If the entry is valid (1 – 4) the unit clicks once. Go to step 4.
If the entry is invalid, the unit clicks 5 times and out of the programming mode.
6. Enter the On code. The unit clicks 3 times after # of digits are entered for the On
code.
7. Enter the Off code. The unit clicks 3 times after # of digits are entered for the Off
code.
Note: There is a 3 second inter digit timer during the programming mode or entering the
On/Off code. If time out, the unit blinks 5 times and leaves the programming mode. Do
not pause for long when making entries.
YOU MAY ENTER ANY 4 DIGIT COMBINATION OF TONES FOR ON AND OFF. BUT
THEY MUST BE THE ONES THAT THE SERVICE YOU ARE USING SUPPLIES.
8. Now, unplug the telephone set from the jack on the unit, and plug in the wiring to
your audio source for the tones you will be using. Repeat this operation for the
other switches.
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FREQUENCY RESPONSE, NC CONTACTS
ISOLATION, NO CONTACTS
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