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6
SM-III Plus Installation and Operation Manual
INSTALLATION
Remote Control
• Mute input
• Manual/Automatic (Arm) input
• Switcher Transfer Input
• Reset input
• Ext input
• Tripped relay, SPDT contacts.
• Manual/AUTOmatic (Arm) relay, May be configured for either NO or NC
contacts.
• Ext relay, SPDT contacts.
• Left audio (1) alarm relay, SPDT contacts.
• Right audio (2) alarm relay, SPDT contacts.
• Pulse 1, open collector rated at 15Vdc @ 100ma
• Pulse 2, open collector rated at 15Vdc @ 100ma
• Auxiliary relay, SPDT contacts. JP5 is used to select the Aux relays control function.
Move the jumper between XFER (transfer), PUL1 (Pulse 1) or PUL2 (pulse 2).
When configured, the Aux relay will follow the selected function.
Note: ALL inputs are 5 volt TTL/CMOS compatible and active low (pull to
ground to activate).
It is recommended that all cables connected to the SM III Plus be looped through
ferrite cores to suppress RF. Surge protection with RF filtering is also suggested for
the power transformer. The purchase of an inexpensive uninterruptible power sup-
ply (UPS) will provide back up in case of power outages.
CAUTION!
Installation of the SM
III Plus in high RF
environments should be
performed with care.
Shielded cable is sug-
gested for all control,
audio inputs and out-
puts. All shields should
be tied to the “CHAS-
SIS GROUND” termi-
nal. The station
ground should be con-
nected to the chassis
ground screw (CH1)
located behind J1 as
viewed from the rear.
For lightning protec-
tion devices, check out
www.polyphaser.com
and www.itwlinx.com.
WEBSITE:
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product updates and
additional information.
