Eaton PH1, Technical Manual

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AlArm pull stAtion - pH1
TM230 Issue F July 2019 www.eaton.com
Alarm pull station - PH1
English
ATEX units
Certified to EN 60079-0, EN 60079-1 and EN 60079-31
Ex d unit (ATEX certification No. ITS11ATEX17308X)
Ex d IIC T6 (-55°C to +70°C) Gb
Ex tb IIIC T85°C (-55°C to +7 0°C) Db IP66
The ATEX certificate and product label carry the ATEX
group and category marking:
II 2 GD
Where:
Signifies compliance with ATEX
II Signifies suitability for use in surface industries
2 Signifies suitability for use in a zone 1 area
G Signifies suitability for use in the presence of gases
D Signifies suitability for use in the presence of dust
These units also have the following approvalse:
Ingress protection: IP67 to IEC60529
Temperature rating for units with addressable modulee:
These units have been certified as safe for use in an
ambient temperature range of (-55°C to +70°C) but
will be marked with the addressable module operating
temperature range (0°C to +49°C)
8.0 Special conditions for safe use
1. The threaded insert as supplied with the unit must
not be removed or replaced.
2. Potential electrostatic charging hazard – clean only
with a damp cloth.
9.0 Functional Safety
The PH1 double action pull handle call point has been
designed for use in flammable atmospheres and harsh
environmental conditions. The GRP enclosure is suitable
for use offshore or onshore where light weight combined
with a high level of corrosion resistance is required.
The function of the PH1 call point is to raise an alarm
manually once verification of a fire or emergency
conditions exists by operating the “LIFT” and “PULL”
handles.
The large “LIFT” and “PULL” GRP handles require double
action to raise the alarm, preventing accidental activation.
The safety function of the PH1 is to open a normally
closed contact (and close a normally open contact) upon
the “Pull” handle being pulled
Under no fault (normal) operating conditions when the
handle has not been pulled, the normally open contact
will be open circuit.
To activate the safety function, the “LIFT” flap will be
pulled upwards revealing the “PULL” handle, the “PULL”
handle can then be pulled downwards to activate the
internal switches. The “PULL” handle will be latched into
place to ensure that the switch stays actuated. The PH1
must then be reset manually by inserting a specific tool
into the two reset holes on the front of the device.
Under fault conditions the failure mode of the PH1 is
a failure to activate the internal switches resulting in a
failure to raise the alarm. For the failure rate associated
with this failure please refer to the table below
Assessment of Functional Safety
The PH1 Call Point is intended for use in a safety system
confirming to the requirements of IEC 61508. SIRA
has conducted a Failure Modes Effects and Diagnostic
Analysis (FMEDA) of the PH1 call point against the
requirements of IEC 61508-2 using a proof test interval of
8760 hours. The results are shown below and are based
on Route 1H
The PH1 is classed as a Type A device.