ENMET LC-8 - Manual (Page 13)

LC S ERIES ENMET
11
4.0 Operation
When a preset alarm point is reached, visual and/or audio alarms are activated. The backlit graphics display automatically
displays the channel in alarm and an alarm level Led(s) are activated on the control panel. The LC-8 is factory set to maintain
these alarms until they are acknowledge
4.1 LC-Series Microcontroller Module
Situated within the LC Control Unit front panel is the Microcontroller Module. This module communicates with all Input
channels connected to the system PCB.
The Microcontroller Module provides a user interface in the form of a back lit graphics display and a four button multifunction
keypad.
Three LED indications are provided directly by the Microcontroller Module and these are visible via MCU front panel:
 Green LED for power.
 Red LED indication of Alarm level 1.
 Red LED indication of Alarm level 2
 Red LED indication of alarm level 3.
 Yellow LED indication of fault condition.
An Audible signal is also provided by a sounder mounted within Microcontroller module. This provides a local audible tone
during alarm or conditions.
The Microcontroller Module also provides the user with many configuration and interrogation facilities via the LCD and
keypad. These facilities include:
Sensor Configuration.
Allows adjustment of Sensor type and range (e.g. Flammable 100%LEL).
Calibration of the system.
 This allows each channel to be calibrated independently. The sensor zero point and span can both be set via this function.
 Calibration of the retransmitted output for each channel.
 Calibration of the channel power supply.
Input Module Relay Configuration.
 Each Input Module contains two relays for alarm levels 1 and 2. The alarm levels can be individually set to be either
rising or falling.
 Fault relay.
 All relays can be configured normally energised or de-energised as required. Latching and non-latching functions can
also be selected.
The microcontroller module contains all of the software required to communicate with up to four detecting channels. The
software is common to all LC Series Control Units.