HSM8-C5 Speaker / Microphone Instructions
The HSM8-C5 is a combination 70V speaker and
pre-amplified
microphone designed to be used in outdoor applications.
The HSM8-C5 is designed to directly interface ONLY with the ETS SMA1-xx-C5 for connection to DVRs, I/P cameras,
etc.
HSM8-C5 is for use in half duplex audio systems only. Audio whine or “feedback” will be result if both speaker and
microphone are active at the same time.
HSM8-C5 Microphone / Speaker Placement.
Locate the HSM8-C5 speaker
/
microphone near the area of interest in the space to be monitored. If a large area is to be
monitored, locate the HSM8-C5 in the middle of the space if possible. Avoid mounting the speaker / microphone near air
conditioning vents, light fixtures or electrical equipment. The HSM8-C5
should be placed as close to the subject(s) as
possible. 5 to 10 feet is ideal. The HSM8-C5 is still useable in the15 to 50+ feet range 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.
Cable Run
Run a single CAT5 cable from the HSM8-C5 Speaker / Microphone and the SMAx-LP interface box. Keep the cable run
distance at or below 1000 feet and away from AC power sources, light fixtures and electrical equipment. Wire the RJ45
cable connectors in the following order:
Pair 1
1
CALL SW
2
CALL SW
Pair 2
3
SPEAKER (70V) +
4
SPEAKER (70V) –
Pair 3
5
MICR
6
MICROPHONE –
Pair 4
7
+12V (MICROPHONE)
8
COM (MICROPHONE)
Call Switch Connections
The HSM8-C5 features a call switch input. This pair of wires is isolated from all other circuitry and can be used for a call
switch, door contact, door release relay, etc. Terminal block connections are “broken out” on the HSM8-C5 and any ETS
SMAX-LP interface ordered with the –C5 option.
Adjusting the microphone “gain” and SMAx-LPxx-C5 “level” controls (audio output)
Remove the windscreen and locate the gain control as shown in the figure on the back of this page. The gain is set to
mid-point at the factory. If the signal from the SM1-WBE is too loud, rotate this control counter clock-wise. If the signal
from the SM1-WBE is too low, adjust this control Clockwise. Experiment with different settings until the desired audio level
is achieved.
See figure below.
If the SMAx-LPxx-C5 will be plugged into a “microphone level” input of an I/P camera, set the microphone gain of the
HSM8-C5 slightly clockwise (or 1/8 of a full turn) from full counter-clockwise. Then use the “level control” on the
SMAx-LPxx-C5 to set a volume that produces an acceptable audio level at the head end.
If the SMAx-LPxx-C5 will be used with a “line level” input, turn the gain control of the HSM8-C5 to 3/4 full clockwise and
adjust the level control on the SMAx-LPxx-C5 to produce the clearest audio level at the head end.
HSM8-C5 Speaker volume
If the volume is too loud, the power level of the HSM8-C5 speaker can be changed by moving the position of the jumper
on the MSI-C5 board (inside the wiring enclosure on the rear of the Speaker housing) to a lower power position. See
figure 1.