Specifications

PHOENIX CONTACT 17
PSR-ESP4
A1 Y1 Y2 A2
32 23
31 13 14
24
K2
K1
04.04.2008 12:52:33 Uhr04.04.2008 12:52:33 Uhr
PSR-ESP4
PSR-ESAM4/3X1
Order No. 2981020 (screw connection)
Order No. 2981017 (spring-cage connection)
• Safety relay for emergency stop and safety
door monitoring and for safe electrical
isolation from the control system and the
peripherals
• Max. safety category 4 in accordance with
EN 954-1 and SIL 3 in accordance with
IEC 61508
• Single-channel control
• Manual or automatic activation
• Two enabling contacts and one alarm contact
• Safe isolation between contacts
Order No. 2981114 (screw connection)
Order No. 2981127 (spring-cage connection)
• Safety relay for emergency stop and safety
door monitoring
• Max. safety category 4 in accordance with
EN 954-1 and SIL 3 in accordance with
IEC 61508
• Single or two-channel control
• Manual or automatic activation
• Three enabling contacts and one alarm
contact
• Safe isolation between contacts
•
Wide-range input 24 V … 230 V AC/DC
Numerous approvals
Apart from the
certification in acc. with
IEC 61508 (SIL 3) that is
important for process
technology, the ESP4 PSR
safety relay has the
following additional
approvals:
• Approval as per the regulations of the
German Lloyd (GL), so that the relay
can also be used in shipbuilding and in
offshore systems
• Approval as per EN 50156-1 (safety
level 3) that allows its use in
combustion plants, steam generators,
waste heat boilers, rotary furnaces
and hot gas generators
Failsafe PLC
PSR safety
relay
Check valve
Example of electrical isolation of a safety PLC output from
the field using the ESP4 PSR safety relay.
IEC 61508 parts
As one of the first manufacturers, Phoenix Contact has
provided a comprehensive portfolio of safety relays certified in
accordance with IEC 61508 (SIL 3) which is being constantly
expanded. The IEC 61508 standard relevant for process
technology is based on four main pillars that help reduce the
residual risk:
• A complete documentation describing all product life cycle
phases
•
The special requirements for the QM system to avoid errors
• Determining and calculating safety-related reliability
specifications, which are used to determine the time of a
functional test
• The requirements regarding diagnostic measures to be
implemented for detecting and rectifying the errors that
could possibly occur.