User manual

ALARM-24 Series User Manual P/N 821542 Rev-A
4
© 2003 Wohler Technologies Inc. ALL rights reserved
Features
The Wohler ALARM-24 audio error alarm systems provide audible and visual alarms for loss of audio, over-range (clipping), and
phase/polarity reversal. When a fault condition occurs, it activates individual channel LEDs and sets off an acoustic alarm. It also
energizes a rear-panel relay contact closure(s) for remote alarm. The standard ALARM model features twenty-four (24) channels
but models featuring eight (8) and sixteen (16) channels are also available
The alarm is activated by audio levels falling outside of a pre-determined range for a pre-determined period of time. They allow for
the setting of both level and time delay on a per-channel pair basis. Error conditions are identified on a per-channel basis. After the
occurrence of an error condition, visual and audible indication is given via front panel LED signaling and Piezo buzzer activation. A
Reset All button is also provided.
The unit may be easily configured using a Windows based application.
The ALARM-24Ax/x models monitor analog signals and feature "mini" Phoenix stye input connectors as standard. The ALARM-
24Dx/x models monitor AES/EBU digital signals with a choice of Phoenix, BNC, or XLR input connectors. Custom variations are
available.
ALARM-24 SeriesALARM-24 Series
ALARM-24 SeriesALARM-24 Series
ALARM-24 Series
1U Audio Alarm Monitor
Description
Section 1: General Features and Specifications
• Centralized monitoring of facility-wide signal conditions
• Only one rack space high
• Up to twenty-four channels can be monitored
• Analog and Digital (AES/EBU) audio signals supported
• Alarms for Signal Loss, Over-range (clipping), and Phase/
Polarity reversal
• Adjustable level thresholds for alarm conditions
• Audible Piezo alarm (mutable)
• Eight, twelve, or twenty-four channel models available
• Visible alarm indication via LEDs for each channel
• Individual channel pair reset buttons
• All channel clear button
• Balanced inputs on "mini" Phoenix connectors
• Software configurable with Windows based application
• Power indication LED
ALARM-24xS/x
WOHLER
TECHNOLOGIES
X
Φ
X
12
X
43
6
Φ
X
5
Φ
X
7
11
Φ
X
89
Φ
X
10
LOSS
CLIP
Φ
X
12
Φ
1413
Φ
1615
X
Φ
17 18
X
Φ
19 20
X
Φ
21 22
ALL
Φ
X
23 24
POWER
RESET
ALARM-24
SERIES
NOTE: Although eight (8) and sixteen (16) channel models are available, this manual specifically addresses the twenty-four channel
models (ALARM-24Ax/x and ALARM-24Dx/x). However, aside from channel quantity, function and operation are identical for all
ALARM models.