Specifications

5
PHONE OR FAX YOUR ORDER, TOLL-FREE! TEL:
1-800-999-2809
• FAX:
1-800-999-9016
• Local volume control for a group of speakers
• Provides buffering for up to 150 self-amplified
speakers
• Allows self-amplified speakers to work with
100/70/25V systems, expanding
existing systems
• Continuously variable attenuator
• Rugged and attractive stainless steel
wall plate with engraved lettering
• Mounts in single gang wall box
• Easy and secure terminal strip
connections
• Jumper selectable 100V, 70V, or 25V speaker
selections as well as T/R
• Bypass feature overrides local volume setting
for high importance messages
• Bypass trim allows a maximum 12 dB
attenuation over bypass announcements
FEATURES:
The BUFEX is a multi-purpose device that can work
as a volume control for a network of speakers, and as
a
buffer that can drive up to 150 speakers. It also
function
s as a system expander when connecting to
100V, 70V, and 25V speaker systems.
To address the needs of emergency announcements,
the BUFEX has a Bypass feature that allows emergency
announcements to be heard at high levels regardless
of the volume setting on the BUFEX. The BUFEX
contains a Bypass Trim feature that allows some
adjustment to the Bypass level.
The
SLC provides a simple and cost effective way to remotely
control the volume level of a network of up to 150 speakers.
Simply wire in series with the audio feed to the desired group
of amplified speakers.
Bypass
Local volume controls allow people
working in an area to control the
level of paging and background
music for their needs. However
in paging systems where alert
announcements are made as well
as general announcements, local
volume controls can be a problem.
When users set volume controls
for very low levels or off, the alert
announcements may not be heard.
When the BUFEX’s Bypass feature
is activated (by an external contact
closure), it overrides the local level
setting of the BUFEX and allows
important messages to be heard at
maximum system volume.
Because page announcements are
made at the maximum system vol-
ume in Bypass mode, the level may
be overpowering in certain areas.
The BUFEX includes a Bypass Trim
feature that allows the installer (not
the user) to lower the volume of an
announcement in Bypass mode, but
the amount of attenuation is limited
to no more than 12 dB. This provides
some relief from pages made at
maximum system volume, but still
ensures that messages made in the
Bypass mode, which are typically
emergency related, are significantly
loud regardless of where the vol-
ume knob on the faceplate is set.
The Bypass Trim will track the level
of the faceplate knob and increase
the alert message level proportionally
up to maximum system volume.
Level Controls
Buffer/Expander/Volume Control
BUFEX
Signal Level Control
SLC
108
50
12
• Continuously variable attenuator
• Rugged and attractive stainless steel
wall plate with engraved lettering
• Mounts in single gang wall box
• Easy and secure terminal strip
connections
• Passive (requires no DC power)
FEATURES:
100V
25V
70V
24V DC
VOL
T/R
BYPASS
TRIM
BYPASS
24V
POLARITY
RECTIFIER
24V
DIVIDER
NETWORK
GND
O/C
10V
R (Spk-)
T (Spk+)
R
T
XFMR
INPUT
AMP
OUT TO
AMPLIFIED
SPEAKERS
10V
BYPASS
SWITCH
VOLINPUT FROM
INTERFACE SOURCE
OUTPUT TO
AMPLIFIED SPEAKERS
R
T
R
T
108
50
12
Level Controls
Dimensions
Product
Weight
2-
7
⁄8" W X 4-
5
⁄8" H X 2-
1
⁄2"D
Less Than
1 lb.
Dimensions
Product
Weight
2-
7
⁄8" W X 4-
5
⁄8" H X 2" D
Less Than
1 lb.