Safety Manager Safety Manual - Tuv-fs.com

F&G applications
F&G applications
Fire and Gas (F&G) applications have the following additional requirements:
1. Each visual indication (alarm, override or test, failure) shall have its own
dedicated digital output. This digital output may be a hardware output or a
communication output, e.g. to a DCS system. Override and test status may be
combined in one visual indication. Alphanumeric displays are not supported.
2. Redundant power supplies must be connected to Safety Manager in such a
way that the redundant power supplies do not fail at the same time, e.g. by
using different primary power sources (e.g. 220 Vac mains and a 24 Vdc from
a battery backup). Detection of power supply failure (e.g. via a
voltage-monitoring module) shall be part of the system design.
Figure 11 Power supply
Power Supply Unit 1
e.g. 200 VAC
Power Supply Unit 2
e.g. 24 VDC
200 VAC / 24 VDC
Voltage
Monitoring
Controller
fault
Safety Manager
0 VDC
3. Faults in the Fire & Gas detection system are indicated visually. This
indication must also be active if the Fire & Gas detection system has been
switched off. This can be set up as shown in Figure 11 on page 51, using a
normally de-energized relay, or via a visual indication in a DCS display which
is activated if the communication to the Fire & Gas detection system fails. The
protected side of the fuses are connected to a voltage-monitoring device to
detect blown fuses.
Safety Manager Safety Manual 51