Releasing Signals To The Reserve Cylinders - Honeywell H-S81-HS Operation Manual

Application Notes

6.2.23 Releasing Signals to the Reserve Cylinders

The system features inputs for receiving the signal that switches the releasing command from the
main bank to the reserve one and vice versa. After these inputs are activated, the system carries out
the following operations:
• Activation of the "Reserve Banks" steady light indicator on module S81-F6001
• Activation of the output for Reserve Bank replication.
6.2.24 Actuation Commands to Equipment Outside the System
The system can control equipment located outside the fire extinguishing zone. E.g. Door closing,
ventilation stop, etc. The modules to be used for these purposes are S81-F5002 module combined
with the termination module S81-T8007.
6.2.25 Emergency Shutdown Devices
The system features inputs for receiving the signal from emergency shutdown devices. If these
devices are actuated under standby and "activated" conditions, the release control signal will be
inhibited until this condition is active and until the "activated" condition is reset. The fault condi-
tion of the emergency shutdown input line will inhibit the activation of fire suppression control out-
puts.
6.2.26 Activation of Alarm Devices with Different Signals
The d.e.c. can control the output of alarm devices by means of two different signals: This is why the
control output of alarm devices is activated intermittently during the warning time (pre-discharge)
and continuously during the "released" or emergency hold conditions.
6.3 Notes for the Development of Systems in Compliance
with the CEI 79-2 Standard
Should the system be required to carry out burglar alarm functions, too, please consider what fol-
lows:
• The steelwork shall be equipped with a micro-switch placed on the revolving door connected
to the 24h surveillance opening of the termination module S81-T8004-1.
• The clamping screws of the cable entry plate must be tamper proof.
• S81-Mod-AIT input modules shall be installed in a tamper proof housing with protection
rating IP30 or higher.
• In order to guarantee the safety systems IMQ certification, the functions NON-LATCHING
and NORMALLY OPEN must not be enabled for the S81-F7007-1 module.
6.4 Notes on I/O Module Redundancy
Safety related modules can be duplicated, in order to increase system availability. In this case, the
two modules must be positioned on different racks and their channels must be configured in the
same way. In case of redundant module, the channels of both modules are seen by the control panel
independently for the purposes of logic processes and diagnosis. The module redundancy of H-
S81-HS systems is based on the following principles:
• An I/O module is considered as faulty by the central unit if it does not respond to bus LVDS
polling or further to three consecutive failed tests on at least one of the channels.
• If one of the two modules is faulty, the other one will become effective for logic processing.
Therefore, logics on redundant channels shall always be OR, and never AND.
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Notes for the Development of Systems in Compliance with the CEI 79-2 Standard
H-S81-HS Installation & Operation Manual — P/N LS10114-000HI-E:A 2/24/2015