Phoenix Contact PSR-PC20 User manual

1Description
SIL coupling relay
PSR-PC20
© PHOENIX CONTACT
Data sheet
Intended Use
The SIL coupling relay is used to adjust the power and for
electrical isolation in high- and low-demand applications.
The coupling relay safely interrupts circuits. The category 3
device is designed for installation in zone 2 potentially
explosive areas.
Possible signal generators
– Failsafe controllers
Contact type
– 1 undelayed enabling current path
– 1 undelayed confirmation current path
– 1 digital signal output
– TBUS interface for transmitting the diagnostics supply
voltage
The enabling current path drops out without delay according
to stop category0 (EN60204-1).
Control
– Single-channel, automatic start
Achievable safety integrity
– Suitable for high and low-demand applications up to
SIL3 according to IEC61508, IEC61511, and
IEC50156
Additional features
– Easy proof test:
-Visually on the device
-Evaluation of the force-guided N/C contact
– Additional diagnostics status information
-Active error acknowledgment via A1
-Status information on M1
– Integrated test pulse filter.
– 2 internal 5AT fuses
– Corrosion protection through lacquering the printed-
circuit board
– Option of screw or spring-cage terminal blocks for
plug-in
–12.5mm housing width
Approvals
   
WARNING: Risk of electric shock
Observe the safety regulations and installation notes in the corresponding section.
Make sure you always use the latest documentation.
It can be downloaded from the product at phoenixcontact.net/products.
This document is valid for the products listed in the “Ordering data”.
This document meets the same requirements as the original operating instructions with respect to the
contents.
106255_en_03 2018-10-19

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2Tableofcontents
1 Description .............................................................................................................................. 1
2 Table of contents ..................................................................................................................... 2
3 Ordering data .......................................................................................................................... 3
4 Technical data ......................................................................................................................... 3
5 Notes regarding documentation .............................................................................................. 8
6 Safety regulations and installation notes.................................................................................. 9
7 Specific terms and conditions of use for ATEX/IECEx ........................................................... 11
8 UL notes ................................................................................................................................ 11
9 Function description .............................................................................................................. 12
10 Function and time diagrams .................................................................................................. 13
11 Basic circuit diagram ............................................................................................................. 13
12 Derating................................................................................................................................. 14
13 Load curve............................................................................................................................. 15
14 Operating and indication elements ........................................................................................ 16
15 Mounting and removing .........................................................................................................17
16 Wiring .................................................................................................................................... 18
17 Startup................................................................................................................................... 19
18 Calculating the power dissipation .......................................................................................... 19
19 Proof test ............................................................................................................................... 20
20 Diagnostics............................................................................................................................ 21
21 Application examples ............................................................................................................ 22
22 Attachment ............................................................................................................................ 24

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Description Ty p e Order No. Pcs./Pkt.
Coupling relay for SIL3 high- and low-demand
applications, couples digital output signals to the
periphery, 1 enabling current path, 1 confirmation current
path, 1 digital signal output, safe state off applications, test
pulse filter, TBUS connection, plug-in screw terminal
block
PSR-PC20-1NO-1NC-24DC-
SC
2700577 1
Coupling relay for SIL3 high- and low-demand
applications, couples digital output signals to the
periphery, 1 enabling current path, 1 confirmation current
path, 1 digital signal output, safe state off applications, test
pulse filter, TBUS connection, plug-in spring-cage
terminal block
PSR-PC20-1NO-1NC-24DC-
SP
2700578 1
3Orderingdata
Accessories Ty p e Order No. Pcs./Pkt.
DIN rail connector for DIN rail mounting. Universal for
TBUS housing. Gold-plated contacts, 5-pos. DIN rail
connector, number of positions: 5, pitch: 3.81 mm
ME 6,2 TBUS-2 1,5/5-ST-3,81
GN
2869728 10
4 Technical data
Hardware/firmware version
HW/FW ≥02/--
The technical data and safety characteristics are valid as of the specified HW/FW version.
Supply
Rated control circuit supply voltage US24 V DC -15 % / +10 % (A1/A2)
Rated control supply current IStyp. 50 mA
Power consumption at UStyp. 1.2 W
Input voltage range "0" signal 0 V DC ... 5 V DC (for safe Off)
Input current range "0" signal 0 mA ... 2 mA (for safe Off)
Inrush current typ. 400 mA (Δt<10µs at Us)
Filter time max. 2 ms (at A1-A2; test pulse width)
≥100 ms (at A1-A2; test pulse rate)
Diagnostic supply voltage UD24 V DC -15 % / +10 % (31/A2, TBUS)
Input current at UD6 mA (at 31-A2 for UD; depending on load +100mA at M1 and
32)
Inrush current at UDtyp. 2.5 A (Δt<20µs at UD)
Protective circuit Serial protection against polarity reversal
33V suppressor diode (A1/A2)
33V suppressor diode (31/A2)

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Relay outputs: Enabling current path
Number of outputs 1 (safety-related N/O contacts: 13/14 (13F/14))
Output description 2 N/O contacts in series, without delay, floating
Contact material AgSnO2
Switching voltage min. 12 V AC/DC
max. 250 V AC/DC (Observe the load curve)
Limiting continuous current 6 A (13/14 for high-demand)
4 A (13F/14 with high/low demand, 13/14 with low demand)
Inrush current min. 3 mA
max. 6 A (N/O contact 13/14)
4 A (N/O contact 13F/14)
Sq. Total current
ITH2 = I12+ I22 + ... + IN236 A2(13/14, see to derating)
16 A2(13F/14, see to derating)
Switching capacity min. 60 mW
Switching frequency max. 0.5 Hz
Mechanical service life 10x 106cycles
Switching capacity according to IEC 60947-5-1 4 A (24V (DC13); N/O contact 13/14)
5 A (250V (AC15); N/O contact 13/14)
4 A (250V (AC15); N/O contact 13F/14)
Output fuse 6 A gL/gG (N/O contact 13/14)
4 A gL/gG (for low-demand applications)
Relay outputs: Confirmation current path
Number of outputs 1 (safety-related N/C contacts: 31/32)
Output description 2 N/C contacts in series, without delay, not floating (reference
ground: A2)
Contact material AgCuNi, + Au (confirmation current path)
Switching voltage min. 20.4 V DC
max. 26.4 V DC
Limiting continuous current 100 mA
Inrush current min. 1 mA
max. 100 mA
Switching capacity min. 20 mW
Switching frequency max. 0.5 Hz
Mechanical service life 10x 106cycles
Output fuse 150 mA Fast-blow
Alarm outputs
Designation M1
Number of outputs 1 (non-safety-related)
Output description PNP
Voltage approx. 22 V DC (UD-2V)
Current max. 100 mA
Maximum inrush current 500 mA (Δt=1ms at Us)
Short-circuit protection no
Output fuse 150 mA fast blow

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Times
Typical starting time with Us< 100 ms (with Uswhen controlled via A1)
Typical release time with Us< 35 ms (when controlled via A1)
Recovery time 500 ms
General data
Relay type Electromechanical relay with forcibly guided contacts in
accordance with IEC/EN61810-3 (EN50205)
Nominal operating mode 100% operating factor
Degree of protection IP20
Min. degree of protection of inst. location IP54
Mounting type DIN rail mounting
Mounting position vertical, horizontal, with front of module upward
Assembly instructions See derating curve
Type of housing PBT yellow
Operating voltage display 1 x yellow LED
Status display 1 x green LED
Indication 1 x red LED
Air clearances and creepage distances between the
power circuits
according to
DINEN50178, EN60079-15
Rated insulation voltage 250 V AC
Rated surge voltage/insulation
See “Insulation coordination”
Safe isolation, 6kV reinforced insulation from control circuit,
start circuit, confirmation current path, signal output to the
enabling current path; 4 kV/basic insulation between all current
paths and housing
Degree of pollution 2
Overvoltage category III
Maximum power dissipation for nominal condition 3.43 W (IL²=36A²)
Note on power dissipation See “Calculating the power dissipation”
Dimensions Screw connection Spring-cage connection
W x H x D 12.5 x 112.2 x 114.5 mm 12.5 x 116.6 x 114.5 mm
Connection data Screw connection Spring-cage connection
Conductor cross section, solid 0.2 mm² ... 2.5 mm² 0.2 mm² ... 1.5 mm²
Conductor cross section, flexible 0.2 mm² ... 2.5 mm² 0.2 mm² ... 1.5 mm²
Conductor cross section AWG/kcmil 24 ... 12 24 ... 16
Stripping length 7 mm 8 mm
Screw thread M3
Torque 0.5 Nm ... 0.6 Nm

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Ambient conditions
Ambient temperature (operation) -40 °C ... 70 °C (observe derating)
Ambient temperature (storage/transport) -40 °C ... 85 °C
Max. permissible relative humidity (operation) 75 % (on average, 85% infrequently, non-condensing)
Max. permissible humidity (storage/transport) 75 % (on average, 85% infrequently, non-condensing)
Maximum altitude ≤2000 m (Above sea level)
Information on operating height See the “Using PSR devices at altitudes greater than
2000mabovesea level” section
Shock 15g
Vibration (operation) 10 Hz ...150 Hz, 2g
Conformance/Approvals
Conformance CE-compliant
The full EC Declaration of Conformity can be downloaded for the product at phoenixcontact.net/products.
Approvals    
IECEx ( IECEx ULD 14.0003X ) Ex nA nC IIC T4 Gc
ATEX ( DEMKO 14 ATEX 1284X ) II 3 G Ex nA nC IIC T4 Gc
UL, USA/Canada ( E140324 ) cULus
UL, USA/Canada ( E360692 ) Class I, Zone 2, AEx nA nC IIC T4 / Ex nA nC IIC Gc T4 X
Class I, Div. 2, Groups A, B, C, D, T4
Shipbuilding ( 11253-14 HH ) C, EMC2
Environmental simulation test ISA-S71.04 (G3)
Functional Safety in accordance with IEC 61508 to SIL 3
Safety data
Stop category according to IEC 60204 0
Safety parameters for IEC 61508 - High demand
Equipment type Type A
HFT 1
SIL 3
PFHD1.95x10-10
(4ADC13; 5AAC15; 8760switching cycles/year)
Demand rate < 12 Months
Proof test interval 240 Months
Duration of use 240 Months
For use in high-demand applications, the diagnostics function must be implemented via the confirmation current path.

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Alternative illustration as 1oo1 structure
Equipment type Type A
HFT 0
SIL 3
Safe Failure Fraction (SFF) 99.98 %
SD 989.32 FIT
SU 230.38 FIT
DD 52.58 FIT
DU 0.20 FIT
Total 1272.48 FIT
MTBF 76.43 Years
PFHD1.95x10-10
For use in high-demand applications, the diagnostics function must be implemented via the confirmation current path.
Safety parameters for IEC 61508 - Low demand
Equipment type Type A
HFT 1
SIL 3
PFDavg 1.27 x 10-4
Proof test interval 72 Months
Duration of use 240 Months
Alternative illustration as 1oo1 structure
Equipment type Type A
HFT 0
SIL 3
Safe Failure Fraction (SFF) 99.68 %
SD 0 FIT
SU 1660 FIT
DD 0 FIT
DU 5.392 FIT
Total 1666 FIT
MTBF 60 Years
PFDavg 2.36 x 10-5 (For T1 = 1 year)
Safety parameters forEN50156
SIL 3

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5 Notes regarding documentation
5.1 Explanation of symbols used and signal words
5.2 Validity
This data sheet is valid for the described product(s) from the
hardware/firmware version specified in the technical data.
5.3 Target group
This data sheet is therefore aimed at:
– Qualified personnel who plan and design safety
equipment for machines and systems and are familiar
with regulations governing occupational safety and
accident prevention.
– Qualified personnel who install and operate safety
equipment in machines and systems.
Qualified personnel:
Qualified personnel are people who, because of their
education, experience, and instruction and their knowledge
of relevant standards, regulations, accident prevention, and
service conditions, have been authorized by those
responsible for the safety of the system to carry out any
required operations and who are able to recognize and
avoid any possible dangers.
Requirements:
Knowledge of the following topics is required:
– Handling safety components
– Valid EMC regulations
– Valid regulations governing occupational safety and
accident prevention
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety
measures that follow this symbol to avoid possible injury or death.
There are three different categories of personal injury that are indicated with a signal word.
DANGER This indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING This indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION This indicates a hazardous situation which, if not avoided, could result in minor or moderate
injury.
This symbol together with the signal word NOTE and the accompanying text alert the reader to a situation which
may cause damage or malfunction to the device, hardware/software, or surrounding property.
This symbol and the accompanying text provide the reader with additional information or refer to detailed
sources of information.

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6 Safety regulations and installation notes
General
•Observe the safety regulations of electrical engineering
and industrial safety and liability associations.
Disregarding these safety regulations may result in death,
serious personal injury or damage to equipment.
Direct/indirect contact
•Protection against direct and indirect contact according
to VDE0100Part410 must be ensured for all
components connected to the system.
In the event of an error, parasitic voltages must not occur
(single-fault tolerance).
Power supply units for 24 V supply
•Only use power supply units with safe isolation
andSELV/PELVaccording to EN 50178/VDE0160.
•Protect the 24V area with a suitable external fuse.
•Make sure that the power supply unit is able to supply
four times the nominal current of the external fuse, to
ensure that it trips in the event of an error.
•Make sure that the output voltage of the voltage supply
does not exceed 32V even in the event of error.
Startup, mounting, and modifications
Startup, mounting, modifications, and upgrades may only be
carried out by an electrically skilled person.
•Before working on the device, disconnect the power.
•Carry out wiring according to the application. Refer to
the “Application examples” section for this.
Reliable operation is only ensured if the device is installed in
housing protected from dust and humidity.
•Install the device in housing protected from dust and
humidity (min.IP54).
In operation
During operation, parts of electrical switching devices carry
hazardous voltages.
•Protective covers must not be removed when operating
electrical switching devices.
For emergency stop applications, automatic startup of the
machine can pose serious risks for the user.
•The machine must be prevented from restarting
automatically by a higher-level controller.
Inductive loads can lead to welded relay contacts.
•Connect a suitable and effective protective circuit to
inductive loads.
•Implement the protective circuit parallel to the load and
not parallel to the switch contact.
Magnetic fields can influence the device. The magnetic field
strength of the environment must not exceed 30A/m.
•Do not use the device in the vicinity of strong magnetic
fields (e.g.,caused by transformers or magnetic iron).
Noise emission may occur when operating relay modules.
Wireless reception may be disrupted in residential areas.
The device is a Class A product.
•Observe the requirements for noise emission for
electrical and electronic equipment (EN61000-6-4).
•Implement appropriate precautions against noise
emission.
WARNING: Death, serious personal injury or damage to equipment
Depending on the application, incorrect handling of the device may pose serious risks for the user or cause
damage to equipment.
•Observe all the safety notes and warning instructions provided in this chapter and elsewhere in this
document.

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Faulty devices
The devices may be damaged following an error. Correct
operation can no longer be ensured.
•In the event of an error, replace the device.
Only the manufacturer or their authorized representative
may perform the following activities. Otherwise the warranty
is invalidated.
– Repairs to the device
– Opening the housing
Taking out of service and disposal
•Dispose of the device in accordance with environmental
regulations.
•Make sure that the device can never be reused.
6.1 Safety of machines or systems
Draw up and implement a safety concept
The machine or system manufacturer and the operator are
responsible for the safety of the machine or system and the
application in which the machine or system is used. In order
to use the device described in this document, you must have
drawn up an appropriate safety concept for your machine or
system. This includes a risk assessment in accordance with
the directives and standards specified in the EC Declaration
of Conformity,as well as other standards.
Risk assessment, validation and function test
•Before using the device, perform a risk assessment on
the machine or system.
•Validate your entire safety system.
•Carry out a new validation every time you make a
safety-related modification.
•Perform a function test on a regular basis.
Achievable safety integrity
Functional safety is guaranteed for the device as a single
component. However, this does not guarantee functional
safety for the entire machine or system. In order to achieve
the desired safety level for the entire machine or system,
define the safety requirements for the machine or system as
well as how to implement them from both a technological
and organizational perspective.
The EC Declaration of Conformity can be
downloaded for the product at
phoenixcontact.net/products.

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6.2 Installation in potentially explosive area
– The category 3 device is designed for installation in
zone2 potentially explosive areas. It satisfies the
requirements of the following standards.
Comprehensive details are to be found in the EU
Declaration of Conformity which is enclosed and also
available on our website in the latest version:
EN60079-0 and EN60079-15
– When installing and connecting the supply and signal
circuits observe the requirements of EN/IEC60079-14.
– Only devices that are suitable for operation in
Exzone2/Div.2 and for the conditions prevalent at the
installation location may be connected to the circuits in
Zone2/Div.2.
– In potentially explosive areas, the device may only be
snapped onto or off of the DIN rail connector and cables
may only be connected or disconnected when the
power is disconnected.
– The device must be stopped and immediately removed
from the Ex area if it is damaged, was subject to an
impermissible load, stored incorrectly or if it
malfunctions.
6.3 Ambient temperature in potentially explosive
area
•Observe the derating curves.
•Observe the special temperature conditions according
to the rating plate.
Figure 1 Rating plate (laser printing)
6.4 Installation in areas with a danger of dust
explosions
7 Specific terms and conditions of
use for ATEX/IECEx
– The device must be connected to supply circuits whose
nominal voltage cannot be exceeded by 140%, which
is caused by transient interference.
– The device is to be installed in a housing (control or
distributor box) that satisfies the requirements of
EN/IEC60079-15 and has at least IP54 degree of
protection (EN/IEC60529).
– The device is to be used in an environment that does
not exceed pollution degree2 in accordance with
EN/IEC60664-1.
8ULnotes
8.1 UL Ordinary Location
– Only use copper connecting cables providing the
permitted temperature range (60°C/75°C).
– Tighten the screws on the screw terminal blocks with
5...7lb in (0.5...0.6Nm).
8.2 UL Hazardous Location
– This device must be installed in an area that is no longer
classified as pollution degree2 in accordance with
IEC60664-1.
– WARNING - Do not disconnect the terminal blocks
when energized!
– The device must be installed in a housing that is
certified for use in ClassI, Zone2, GroupIIC and IP54
in accordance with IEC60529 if it is used in the
environments of ClassI, Zone2.
– A surge protection device must be provided outside of
the device that is set to a level that does not exceed
140% of the nominal voltage at the power supply
connections of the device.
WARNING: Explosion hazard when used
in potentially explosive areas
Please make sure that the following notes and
instructions are observed.
WARNING: Explosion hazard
The device is not designed for use in
atmospheres with a danger of dust
explosions.
13F/14
NO-contact
Output 250 , 24V AC V DC
6A Resistive
B300, R300
24 100mAV DC
Surrounding Air
Temperature
250 , 24V AC V DC
4A Resistive
B300, R300
- °C to °C40 55
A1/A2 50mA24 V DC,
13/14
NO-contact
M1, 31/32
DO, NC-contact
Resistive
13/14
NO-contact
Input
250 , 24 5AV AC V DC
Resistive
B300, R300
- °C to °C40 60
13/14
NO-contact
250 , 24 3.4AV AC V DC
Resistive
B300, R300

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9 Function description
9.1 Single-channel control
The external enable signal of the failsafe controller is
switched at A1.
9.2 Compatibility
9.3 Automatic start
The device starts automatically once it has received the
external enable signal of the failsafe controller.
9.4 Safe shutdown
After deactivating the external enable signal of the failsafe
controller, the enabling current path opens and the contacts
enter the safe state.
When the enabling current path is open, the device is in the
safe state.
The confirmation current path closes.
9.5 Diagnostics and status information
The device provides the following non-safety-relevant
diagnostic capabilities and status information.
Prerequisite for this is that the diagnostics supply voltage is
applied.
9.5.1 Active error acknowledgment via A1
The device reports a potential error via A1 to the respective
digital output of the failsafe controller.
For active error acknowledgment, line load monitoring is
required from the failsafe controller.
If an error occurs within the device, the device simulates an
error that the safety controller detects when line load
monitoring is switched on.
9.5.2 Status information on M1
Signal output M1 transmits non-safety-related status
information.
The signal output is active when the enabling current path is
open.
Prerequisite for this is that the diagnostics supply voltage is
applied.
9.6 Proof-Test
The repeat testing required by standards can be carried out
in the following ways:
1. Visually on the device via the diagnostics LEDs
2. Evaluation of the force-guided N/C contact
Prerequisite for this is that the diagnostics supply voltage is
applied.
9.7 Test pulse filter
By filtering the control controller test pulses, premature
failure of the forcibly guided safety relay is prevented.
9.8 TBUS interface
The device is equipped with a TBUS interface for
transmitting the diagnostics supply voltage for up to 10
devices
9.9 Enabling current path with internal fuse
The enabling current path can be connected via internal 5AT
fuses as an option.
In order to establish the compatibility with the
failsafe controller and use device-internal
diagnostics, apply the diagnostic supply
voltage.
This diagnostic procedure is only possible
with compatible controllers.
If you do not need the active error messaging
via A1, use the input A1'.
You can find information on executing and
evaluating the proof test under the special
sections “Proof test” and “Diagnostics”.

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10 Function and time diagrams
10.1 Time diagram for automatic start
Figure 2 Time diagram for automatic start
Key:
11 Basic circuit diagram
Figure 3 Block diagram
Key:
A1/A2 Control
31 24VDC diagnostics input
32 Diagnostic output 24VDC
13,13F/14 Enabling current path, undelayed
M1 Digital alarm output
A1
31
32
13/14
M1
A1 +24V control input with active error
acknowledgment
A2 0 V (GND)
A1' +24V control input without active error
acknowledgment
M1 Signal output (PNP)
31 24VDC diagnostics input
32 Diagnostic output 24VDC
13F Enabling current path - input with 5AT fuse
13 Enabling current path - input without 5AT fuse
14 Enabling current path - output
TBUS Routing of the diagnostic supply voltage
K1/K2 Channel 1/Channel 2
Connect at most 10 devices in series via the
TBUS DIN rail connector.
Confirmation current path 31/32 (N/C contact)
is not an electrically isolated current path and
may only be connected to a maximum voltage
of 26.4V in relation to A2.
M1
A1 A1'
PWR
24V DC
PSR-PC20
ERR
K1
K2
DGN
F2
5A T
F1
5A T
31
32 14
13
13F13F
T-Bus A2
T-Bus

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11.1 Insulation coordination
Key:
12 Derating
12.1 Enabling current path 13/14
12.1.1 Vertical or horizontal mounting position
The derating curve applies for the following conditions:
– Mounting on a vertical or horizontal DIN rail
– Devices mounted next to each other without spacing
– For enabling current path 13/14
Figure 4 Derating curve (13/14) - vertical or horizontal
mounting position, without spacing
12.1.2 Mounting position with device front facing
upwards
The derating curve applies for the following conditions:
– Mounting on a lying DIN rail with the device front facing
upwards
– Devices mounted next to each other without spacing
– For enabling current path 13/14
Figure 5 Derating curve (13/14) - mounting position with
device front facing upwards, without spacing
A1/A2,
31/32, M1
13,13F/14 Housing
A1/A2,
31/32, M1
-6kV ST 4kV BI
13,13F/14 --4kV BI
Housing ---
BI Basic insulation
ST Safe isolation
Basic insulation
(rated surge voltage of 4kV)
A mixture of SELV and PELV is strictly
prohibited. Only switch 250VAC at one of the
enable contacts if the adjacent contact/
enabling current path carries the same
potential.
Safe isolation/reinforced insulation
(rated surge voltage of 6kV)
Reinforced insulation (e.g.,thanks to greater
air clearances and creepage distances
between conductive paths) is designed for
one overvoltage category higher than basic
insulation. This means that SELV circuits of
U25VAC or U60VDC and circuits with
higher voltages can be mixed.
The temperature is measured at a 5cm
clearance below or to the side of the device.
Note section "Mounting positions".
1020304050 6070
10
20
30
40
0
T [°C]
A
I[A]
TH
²²
36
55
9
10 20 30 40 50 60 70
10
20
30
40
0
2
36
55
12
T[°C]
A
2
I[A]
TH
²
2

PSR-PC20
106255_en_03 PHOENIX CONTACT 15 / 25
12.2 Enabling current path 13F/14
12.2.1 Horizontal mounting position
The derating curve applies for the following conditions:
– Mounting on a horizontal DIN rail
– Devices mounted next to each other without spacing
– For enabling current path 13F/14
Figure 6 Derating curve (13F/14) - horizontal mounting
position, without spacing
12.2.2 Vertical mounting position
The derating curve applies for the following conditions:
– Mounting on a vertical DIN rail
– Devices mounted next to each other without spacing
– For enabling current path 13F/14
Figure 7 Derating curve (13F/14) - vertical mounting
position, without spacing
12.2.3 Mounting position with device front facing
upwards
The derating curve applies for the following conditions:
– Mounting on a lying DIN rail with the device front facing
upwards
– Devices mounted next to each other without spacing
– For enabling current path 13F/14
Figure 8 Derating curve (13F/14) - mounting position
with device front facing upwards, without
spacing
13 Load curve
13.1 Ohmic and inductive load
Figure 9 Relay load curve - ohmic and inductive load
Key:
1020304050 6070
4
8
12
16
0
T [°C]
A
I[A]
TH
²²
55
9
65
0
1020304050 6070
0
2
55
2
I[A]
TH
²
2
T [°C]
A
4
8
12
16
9
Ohmic load L/R=0ms
Inductive load L/R=40ms
1020304050 6070
0
2
55
2
I[A]
TH
²
2
T [°C]
A
4
8
12
16
I [A]
DC
U[V]
DC
10
0,1
20
50
100
200
500
1000
0,2 0,512 510



PSR-PC20
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14 Operating and indication elements
14.1 Connection versions





1COMBICON plug-in screw terminal block
2COMBICON plug-in spring-cage terminal block
3Metal lock for fixing to DIN rail











14.2 Connection assignment
0,5-0,6 Nm
5-7 lb In
PSR-...-SC
7 mm
AWG 24-12
0,2-2,5mm 2
PSR-...-SP
8 mm
AWG 24-16
0,2-1,5mm 2
PHOENIXCONT
ACT GmbH& CO.KG
Flachsmarktstrasse8
32825Blomberg, Germany
PSR-...
Ord.-No.: xx xx xxx
Phoenix Safety Relays
Documentation
PSR-...
PHOENIXCONT
ACT GmbH& CO.KG
Flachsmarktstrasse8
32825Blomberg, Germany
PSR-...
Ord.-No.:xx xx xxx
Phoenix Safety Relays
Documentation
PSR-...
2
1
3

14

14

14
The year the device was constructed can be
found underneath the CE designation on the
housing.
M1 Signal output (PNP)
A1' +24V control input without active error acknowledgment
31 24VDC diagnostics input
32 Diagnostic output 24VDC
A1 +24V control input with active error acknowledgment
A2 0 V (GND)
PWR Power LED (yellow)

ERR Error LED (red)
DGN Diagnostics LED (green)






13F Enabling current path - input with 5AT fuse
13 Enabling current path - input without 5AT fuse
14 Enabling current path - output
M1A1'
31
A1 A2
32
1314
13F
13F 14
14
PWR
ERR
DGN
PSR-PC20

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15 Mounting and removing
•Mount the device on a 35 mm DIN rail according to
EN60715.
•To remove the device, use a screwdriver to release the
snap-on foot.
When using the TBUS DIN rail connector:
•Plug the required number of DIN rail connectors
together and push them onto the DIN rail.
•Then place the device onto the DIN rail.
Figure 10 Mounting and removing
15.1 Mounting positions
The following mounting positions are permissible:
Figure 11 Permissible mounting positions
1Vertical mounting position
2Horizontal mounting position
3Mounting position with device front facing upwards
NOTE: device defect
Using an incorrect DIN rail connector or a
dummy plug can cause the module to become
faulty.
Only use the green TBUS DIN rail connector.
See ordering data.
Never use the PSR-TBUS-TP dummy plug.
NOTE: Damage to the connectors
When using DIN rail connectors, make sure
that the contact opening in the base of the
device is aligned correctly over the contact
block of the DIN rail connector.
Note the snap-on direction of devices and DIN
rail connectors:
-TBUS plug component left
-Device snap-on foot downwards
NOTE: Wear on the connectors
Up to eight insertion cycles are permitted for
connecting the devices by means of the DIN
rail connector.
Note the derating curves for various mounting
positions.
See section "Derating".
ABC
123

PSR-PC20
106255_en_03 PHOENIX CONTACT 18 / 25
16 Wiring
•Connect the cables to the connection terminal blocks
using a screwdriver.
Figure 12 Connecting the cables for PSR-...-SC
(screw terminal block)
Figure 13 Connecting the cables for PSR-...-SC
(spring-cage terminal block)
16.1 Signal generator connection versions
•Connect suitable signal generators to A1/A2.
Figure 14 Signal generator connection versions
1Single-channel control via failsafe controller
16.2 Feedback circuit connection versions
•Connect the 24VDC diagnostic supply voltage to
terminal block 31.
•Read the confirmation current path back to a digital
input of the failsafe controller via terminal block 32.
•Place the relevant N/C contact in the path from 31/32 to
the digital input of the failsafe controller to monitor
external contactors or extension devices with force-
guided contacts.
Figure 15 Feedback circuit connection versions
1Confirmation current path without monitored contact
extension
2Confirmation current path with monitored contact
extension
It is recommended that ferrules are used to
connect stranded cables.
For compliance with UL approval, use copper
wire that is approvedupto 60°C/75°C.
0,5-0,6 Nm
5-7 lb In
7 mm
AWG 24-12
0,2-2,5mm
2
PSR-...-SC
A
B
A
A
B
8mm
AWG 24-16
0,2-1,5 mm
2
PSR-...-SP
Use the TBUS DIN rail connector for
transmitting the diagnostics supply voltage.
WARNING: Loss of safe diagnostics!
Connect at most 10 devices in series via the
TBUS DIN rail connector.
A1
A2
1
24V
GND DIDO
SIS/ FS-PLC
0V
1
24V
24V
GND DIDO
SIS/ FS-PLC
0V
24V
K1
2
24V
GND DIDO
SIS/ FS-PLC
0V
32
31
( )
( )
32
31
( )
( )

PSR-PC20
106255_en_03 PHOENIX CONTACT 19 / 25
17 Startup
•Apply the diagnostic supply voltage (24VDC) to
terminal blocks 31/A2 or via the TBUS.
DGN LED lights up.
•Provide the external enable signal of the failsafe
controller (24VDC) at terminal blocks A1/A2
(or A1'/A2).
PWR LED lights up.
Enabling current path 13/14 (or 13F/14) closes.
Confirmation current path 31/32 opens.
Signal output M1 is not active.
The DGN LED is switched off.
18 Calculating the power dissipation
Input power dissipation
PInput=UB²/(US/IS)
Power dissipation of diagnostic supply
PDiagnostics=UBD²/(UD/ID)
Contact power dissipation
With the same load currents:
PContact=nIL²RContact
With different load currents:
PContact=(IL1²+IL2²+...+ILn²)RContact
Total power dissipation
PTotal=PInput+POutput+PContact
therefore
PTotal=UB²/(US/IS)+UBD²/(UD/ID)+nIL²RContact
or
PTotal=UB²/(US/IS)+UBD²/(UD/ID)
+(IL1²+IL2²+...+ILn²)RContact
Key:
The diagnostic supply voltage makes the
failsafe controller compatible and allows the
use of the device-internal diagnostics.
The total power dissipation is based on the
input power dissipation, the power dissipation
of the diagnostic supply, and the contact
power dissipation.
PPower dissipation in mW
UBApplied operating voltage
USRated control circuit supply voltage
ISRated control supply current
UBD Applied operating voltage for diagnostics
UDDiagnostic supply voltage
IDCurrent consumption of diagnostics
nNumber of enabling current paths used
ILContact load current
RContact Contact resistance of the relay contacts
For enabling current path 13/14: 50mΩ
For enabling current path 13F/14: 100mΩ

PSR-PC20
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19 Proof test
To verify the device function, proceed according to one of
the following diagnostic options.
19.1 Visually on the device via the diagnostics LEDs
1. Deactivate A1 (or A1').
Expectation (proof test passed):
When diagnostic supply voltage is applied:
– The LED DGN lights up green. All other LEDs are off.
Potential errors:
When diagnostic supply voltage is applied:
– The red ERR-LED lights up.
– The green DGN-LED and the red ERR-LED light up.
– Neither of the specified LEDs light up.
19.2 Evaluation of the force-guided N/C contact
1. Deactivate A1 (or A1').
2. Read the confirmation current path via terminal block 32
back into a digital input of the failsafe controller.
Or:
Measure the output voltage at contact32.
Expectation (proof test passed):
When diagnostic supply voltage is applied:
– The failsafe controller receives a 24 V signal (UD) via
terminal block2.
– On contact 32, 24VDC (UD) are measurable.
Behavior in the event of an error
– The failsafe controller does not receive a 24V signal
(UD) via terminal block32.
– On contact 32, no 24VDC (UD) are measurable.
WARNING: Loss of functional safety due
to malfunction.
If the proof test contains errors, the device no
longer functions correctly.
•Replace the device.
In order to establish the compatibility with the
failsafe controller and use device-internal
diagnostics, apply the diagnostic supply
voltage.
Observe a potential error response time of 4s
for the diagnostics LEDs.
Overview of display options: See “Diagnostics
via LEDs” section.
See section "Evaluation of the confirmation
current path".