The RSC-132A is a microprocessor controlled line monitoring device. Up to 32 speaker lines can be monitored fully automatically. Faults are indicated through a buzzer incorporated in the device, an LED located on the front panel and a potential free contact on the rear. Through the use of external relay boards, connected via a 5 m SUB D cable, the unit is only 1 RU in height. The only preparatory measure for putting the device into operation is to insert the RSC-008A relay boards into the speaker lines. To complete the installation, the relay boards only have to be connected to the base unit and have to be measured.
Features
Integrated Watchdog circuit.
By measuring the impedance, the device detects missing speakers, short circuits on the line or line breaks.
When the measurement is performed, the line is checked for ground faults at the same time.
If the measured values are above or below the permissible range, the device indicates „over“ or „under range“.
The measuring intervals can be set from 1 minute to 24 hours.
The configuration is stored in a non-volatile E2PROM.
With 4 relay boards (for 8 circuits) one RSC-132A unit can monitor up to 32 circuits.
In the event of an emergency or when an important announcement has to be made, the measurement can be interrupted by means of a potential free contact.
When a fault is detected, the unit issues an audible alarm. Additionally, the LED on the front panel is lit. At the same time a contact is closed to activate external units.
The 2-digit LCD constantly indicates the time remaining until the next measurement is taken or, in the case of a fault, the type of fault and the affected line.