ETS SMA1-MPC5 User manual

SMA1-MPC5 Speaker / Microphone Interface Instructions
The SMA1-MPC5 is a two way public address, audio surveillance interface that is designed to connect to DVRs and IP
cameras. The SMA1-MPC5 can be used with any ETS Sound Surveillance speaker/microphone with the C5 option. The
SMA1-MPC5 can also be used with any 70v speaker and any Sound Surveillance pre-amplified microphone with the use
of our MIS-C5BO breakout box. The SMA1-MPC5 is typically located near the DVR or IP camera. Note-input and output
signals on the SMA1-MPC5 are “line level” only. Note- this equipment is intended for use with camera or VMS software
that has a PTT (push to talk) half duplex option for two way audio. If your software does not support this mode you may
get acoustical howling feedback.
Microphone / Speaker Placement.
Locate the speaker and microphone near the area of interest in the space to be monitored. If a large area is to be
monitored, locate the speaker and microphone in the middle of the space if possible. Avoid mounting the speaker and
microphone near air conditioning vents, light fixtures or electrical equipment. The speaker and microphone should be
placed as close to the subject(s) as possible. The speaker and microphone are usable at distances of up to 25 feet in
public address applications but is dependent on the level of background noise in the area. Experimentation in the
environment will determine what distances work best.
Audio Signal Cable Runs
Recommended cable is: CAT5 between the SMA1-MPC5 amplifier / interface and the microphone/speaker (STW1-XX-
C5, MSI-C5-BO, or HSM11-C5 or CSM8-C5). Keep the cable run distances under 500 feet and away from AC power
sources, light fixtures and electrical equipment. Make connections as shown in Figure 1.
IMPORTANT
Wire the RJ45 connectors in the following manner. DO NOT wire as a standard Ethernet cable and do not cross
connections over.
Pair 1 1 CALL SW
2 CALL SW
Pair 2 3 SPEAKER (70V) +
4 SPEAKER (70V) –
Pair 3 5 MICROPHONE +
6 MICROPHONE –
Pair 4 7 +12V (MICROPHONE)
8 COM (MICROPHONE)
SMA1-MPC5 location and power: The SMA1-MPC5 interface box is designed to be located next to a DVR or IP camera.
The SMA1-MPC5 requires a 120VAC power source within 3 feet of its location. If this is not possible in your application,
you can splice in up to 100 feet of 18 awg, 2 conductor cable to extend the distance between the AC power source and
the SMA1-MPC5.
DVR or IP camera connections:
Connect the “audio out” of the SMA1-MPC5 to the “audio in” of the DVR or IP camera. Connect the “audio in” of the
SMA1-MPC5 to the “audio out” of the DVR or IP camera. Note-input and output signals on the SMA1-MPC5 are “line
level” only. If the DVR or IP camera uses screw terminals for audio connections, simply cut off the ends of the supplied
RCA patch cables, strip the wires back and connect the wires to the IP camera terminal blocks. The center conductor(s) of
a cut patch cable are + and the shield is -.
Adjusting the SMA1-MPC5 Levels:
Set both level controls to 1/8 clockwise from full counter clockwise on the SMA1-MPC5 before powering the system up.
Adjust the controls + or – to the desired levels for both speaker and microphone. If the microphone sound at the DVR or
head end is distorted, rotate the control towards the – mark (counter- clockwise). Adjust the volume of the speaker to the
desired level. If the speaker volume is too high, amplifier oscillations may result. Turn the level control down if you
experience this.

Caution
It may be against the law to install this microphone kit in certain environments. It may also be against the law to record
conversations of the person(s) being monitored without their knowledge. It is the responsibility of the installation company
and end-user to determine if the application of this product is legal. These laws vary from state to state. If you are not
informed on these matters, consult a qualified attorney or contact the appropriate state agency. A sticker is provided with
this kit for the applications where notification must be posted.
Warranty
All ETS products carry a one year parts and labor warranty. This warranty does not cover damages as a result of misuse,
improper handling of the unit or exposure to extreme temperatures or moisture. At its discretion, ETS reserves the right to
repair or replace this unit under the conditions of the warranty. If you experience problems with your equipment call ETS
at: 505-888-3923 to obtain a return authorization number. Equipment requiring repair beyond the warranty period or units
that have been damaged or are not covered under the warranty can be repaired by ETS for a minimal cost under most
conditions.
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