Amico Nema 4 Master Alarm - Manual (Page 9)

MASTER ALARM
8. MASTER/NEMA 4 STATUS MODULE
Each Master Status Module will continuously monitor up to 10 signals from source equipment
and pressure switches. If any of the signals being monitored go into an alarm condition, a
Red LED will illuminate and the audible alarm will sound. The module has a slow and
a rapid flashing LED rate. The last alarm condition always flashes at a rapid rate, while the
previously acknowledged alarms always flash at a slow rate.
PLEASE NOTE: Contacts located on back of module are Dry Contacts only.
DO NOT apply any voltage.
For Annual Test
• Reset power to make sure all LED’s light up
• Push and hold the ‘Test’ button to light up all LED’s and the audible alarm
7. SENSOR MODULE
The Sensor Module contains the transducer which converts the pressure/vacuum pres-
sure source into a digital signal that is displayed on the Display Module. The sensor
module shall be housed in an anodized aluminum and nickel-plated brass enclosure
to act as an interference barrier also it is temperature compensated. Each sensor is
clearly labeled and colour coded for the gas or vacuum being monitored. The sen-
sor module contains a gas specific DISS fitting to ensure correct connection of the proper
sensor to the respective gas. Each sensor has been factory calibrated by computer for the
specific gas shown on the sensor housing. If it is not connected to the appropriate gas
display module, an error message (EO2) will be displayed.
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6. COMPACT DISPLAY MODULE
The Compact Display Module shall have 2 displays in 1 board. The Compact Module
provides a digital display of the actual pressure/vacuum of a gas being monitored. In
addition a gas trend indicator bar with High and LOW alarms are displayed. The trend bar
as two colored LED’s: GREEN for Normal and RED for High and Low condition.
Each display module contains a gas specific colour coded label (USA or ISO colours are
available). The Display Module is field adjustable for pressure/vacuum settings, repeat
alarm, and unit of measure. Dry contacts for high and low alarms are available for remote
monitoring of each module.