Atest Gaz Sigma Control L, User Manual

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1 Preliminary informa!on
1.1 Safety
This device may contain voltage dangerous to human health and life. Disconnect the device
from its power supply to carry out any tasks to be done a er its cover removal.
1.2 Purpose
Sigma Control L is an advanced Control Unit for use with small size gas detec on systems. It controls all the
devices connected and integrates them to create a single Sigma Gas system. Its advantage is to provide two
unique, clear and consistent data presenta ons:
general view:
Sigma Control L (like other Sigma Gas system Control Units) is provided with a unique Visual
System Indicator allowing users to precisely and immediately assess the whole system “at
a glance”, even remotely.
detailed view:
the user staying in the vicinity of the Control Unit can monitor its indica ons (e.g. detectors) and
manage them (alarm confirma on, changing parameters, etc.).
The Sigma Control L Unit cooperates with other Sigma type devices and makes an op mum and economical
solu on to provide access to all basic Sigma Gas system features.
Sigma Control L Unit reads:
signals from Gas Detectors connected to it (measurement values, diagnos c informa on, etc.),
digital input (DI),
operator’s inputs (keyboard).
By using this informa on Sigma Control L:
ac vates signal connected (both acous c and visual),
generates visual, acous c indica ons for users,
ac vates system outputs (e.g. to DCS or a ven la on system).
1.3 Device characteris!cs
Basic func onalists
Supports from 1 to 20 Sigma line detectors.
Two 24 V DC outputs dedicated to control a visual and acous c indicator.
Three configurable dual outputs to provide the following func onalists:
• output is triggered if detector warning and alarm thresholds are exceeded (warning 1,
warning 2 and alarm),
• system status indica on by using a visual system indicator,
• pulse valve control (see table 3),
• makes it possible to deny or delay output execu on,
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User's Manual: POD-026-ENG R11