PI-EX-SD-21-25
Ex-i solenoid driver for Group IIC gases,
loop-powered, pluggable
INTERFACE
Data Sheet
103211_00_en
1
Description
1.1
–
–
–
–
–
–
Properties
Single-channel
Loop-powered
Output [Ex ia] IIC
Installation in Zone 2
Electrical 2-way isolation
SIL 3 acc. to IEC 61508
© PHOENIX CONTACT - 02/2008
The solenoid driver
PI-EX-SD-21-25
links a signaling
device installed in the safe area to a device located in the
hazardous area. The block itself is installed outside the
hazardous area or in Zone 2.
Solenoid valves, alarm modules, or other intrinsically safe
devices can be connected, and simple electrical equipment
such as LEDs can be operated.
The safety data allows loads to be operated in an IIC group
gas.
The solenoid driver PI-EX-SD-21-25 does not require its
own power supply; instead, it is simply looped into the
circuit.
The device is associated equipment, which is suitable for use in Zone 2, provided that particular
conditions have been observed.
When installing and operating the device, the applicable safety directives (including national safety directives),
accident prevention regulations, as well as general technical regulations, must be observed.
Observe the safety regulations and installation notes on page 4.
Make sure you always use the latest documentation.
It can be downloaded at
www.download.phoenixcontact.com.
A conversion table is available on the Internet at
www.download.phoenixcontact.com/general/7000_en_00.pdf.
This data sheet is valid for all products listed on the following page:
PI-EX-SD-21-25
Table of Contents
1
2
3
4
5
6
7
8
9
Description..................................................................................................................................
1
Ordering Data .............................................................................................................................
2
Technical Data............................................................................................................................
2
Safety Regulations and Installation Notes..................................................................................
4
Structure .....................................................................................................................................
5
Installation ..................................................................................................................................
5
Comparison of Safety Data ........................................................................................................
6
Calculation of a Valve Circuit......................................................................................................
6
Safety-Related Applications (SIL 3)............................................................................................
7
10 Appendix.....................................................................................................................................
7
2
Ordering Data
Type
PI-EX-SD-21-25
Ex Solenoid Driver
Description
Ex-i solenoid driver for Group IIC gases, loop-powered, pluggable
Order No.
2865201
Pcs./Pck.
1
Accessories
Description
Motherboard
Ex basic terminal block for intrinsically safe signals with knife disconnection
and test connections
Intrinsically safe basic terminal block, with knife disconnection,
test connections, and surge protection, for mounting on NS 35/7,5
Basic terminal block for
non-intrinsically
safe signals,
with
surge protection
Basic terminal block for
non-intrinsically
safe signals,
without
surge protection
Continuous plug-in bridge, 500 mm long, insulated, can be cut to length, for
potential distribution, I
max
= 32 A, color of the insulating material:
Red
Blue
Gray
Type
See "INTERFACE" catalog
PI-EX-TB
TT-PI-EX-TB
TT-PI-TB
PI-TB
Order No.
2835901
2858386
2858373
2835943
Pcs./Pck.
10
10
10
10
FBST-500-PLC-RD
FBST-500-PLC-BU
FBST-500-PLC-GY
For additional accessories, please refer to the "INTERFACE" catalog from Phoenix Contact.
2966786
2966692
2966838
20
20
20
3
Input
Technical Data
20 V DC - 30 V DC
Input signal
Output
Output characteristic curve (see Figure 1 on page 3)
Output voltage, intrinsically safe
Current limit
U
V
= 21.9 V (guaranteed voltage)
R
i
= 654
Ω
(internal resistance)
5.5 V at 25 mA
At 25 mA
103211_00_en
PHOENIX CONTACT
2
PI-EX-SD-21-25
Output characteristic curve
Output voltage U
V
20
21.9 V
10
5.5 V
0
0
10
20
30
40
50
60
Output current I
V
Figure 1
Output characteristic curve for PI-EX-SD-21-25
General Data
Supply voltage range
Maximum current consumption at 24 V DC
Maximum power dissipation at 24 V DC
Electrical isolation (input/output)
Housing material
Inflammability class according to UL 94
Degree of protection
Color
Dimensions
Without basic terminal block (width x height)
With basic terminal block (width x height x length)
12.4 mm x 108.6 mm
12.4 mm x 147 mm x 145 mm
(No separate supply voltage necessary)
130 mA
0.9 W
375 V (peak value according to EN 50020)
PBT and polyamide PA non-reinforced
V0
IP20
Green
Ambient Conditions
Ambient temperature (operation)
Average temperature according to IEC 61508
Ambient temperature (storage/transport)
Permissible humidity (operation)
-20°C - +55°C (perpendicular mounting of DIN rail)
-20°C - +60°C (horizontal mounting of DIN rail)
40°C
-40°C - +80°C
10% - 95% (relative humidity, no condensation)
Indicators
Status indicator
Yellow LED (switching state)
Red LED (line fault)
EU Conformity
Complies with EMC directive 89/336/EEC
Ex directive (ATEX)
Yes
Yes
Safety Data According to ATEX for Intrinsically Safe Circuits
Maximum output voltage U
o
Maximum output current I
o
Maximum output power P
o
Gas group
Max. external inductance L
o
Max. external capacitance C
o’
True r.m.s. value of maximum AC voltage U
m
Maximum DC voltage U
m
25.1 V
39 mA
245 mW
IIA
20 mH
0.66
μF
250 V AC
125 V DC
IIB
5 mH
0.43
μF
IIC
0.5 mH
0.093
μF
Certificates
ATEX
UL/CUL
X
II (1) GD [EEx ia] IIC/IIB/IIA, TÜV 06 ATEX 553193
X
II 3 G Ex nA II T4 X
UL applied for
103211_00_en
PHOENIX CONTACT
3
PI-EX-SD-21-25
4
4.1
Safety Regulations and Installation Notes
Installation and Operation
Installation in Zone 2
WARNING: Risk of explosion
The device is associated equipment of the
"intrinsic safety" protection type, and is suitable
for installation in Zone 2 if the
symbol is
printed on the block.
Observe the specified conditions for use in potentially
explosive areas.
WARNING: Risk of explosion
Install the device in a suitable
housing with a
minimum of IP54 degree of protection.
Within this context, observe the requirements
of IEC 60079-14/EN 60079-14, e.g., steel
housing with a wall thickness of 3 mm.
WARNING: Risk of explosion
Disconnect the block
before
you:
– Snap it on or remove it.
– Connect or dismantle cables for
non-intrinsically safe circuits.
WARNING: Risk of explosion
Only use Category 3G PI-EX modules
(ATEX 94/9/EC).
Installation in Areas With a Danger of Dust Explosions
WARNING: Risk of explosion
The device is
not
designed for use in areas
where there is a danger of dust explosions.
Connection to
intrinsically safe circuits in areas with a
danger of dust explosions
(Zones 20, 21, or 22) is
only
permitted if the equipment connected to this circuit is
approved for these zones (e.g., Category 1D, 2D, or 3D).
4.3
Use in Safety-Related Applications (SIL 3)
Follow the installation instructions.
Installation, operation, and maintenance may
only be carried out by qualified specialist
personnel.
When installing and operating the device, the applicable
safety directives (including national safety directives),
accident prevention regulations, as well as general
technical regulations, must be observed.
Access to the circuits within the device is
prohibited.
Do not repair the device yourself, but replace it with an
equivalent device. Repairs may only be carried out by the
manufacturer.
The device is suitable for IP20 degree of
protection if:
– It is installed outside the potentially
explosive area.
– The area around the device is clean and
dry.
Install the device in a suitable housing with a suitable
degree of protection in accordance with IEC 60529 in order
to protect it from mechanical and electrical damage.
4.2
Safety Regulations for Installation in the
Potentially Explosive Area
Regulations for Intrinsically Safe Circuits
WARNING: Risk of explosion
When taking
measurements
on the
intrinsically safe side, it is imperative that you
observe the relevant regulations regarding the
connection of intrinsically safe equipment.
Only use equipment approved for
intrinsically safe circuits.
WARNING: Risk of explosion
If the
device has been used in
non-intrinsically safe circuits,
it must
not
be
used again in intrinsically safe circuits.
Clearly label the module as being
non-intrinsically safe.
The safety data may be derived from the operating
instructions and the certificates (EC type examination
certificate; additional certificates if necessary).
When using the PI-EX-SD-21-25 in safety-related
applications, observe the instructions in Section 9, as the
requirements differ for safety-related functions.
103211_00_en
PHOENIX CONTACT
4
PI-EX-SD-21-25
5
Structure
9
6
Installation
Electrostatic discharge
The device contains components that can be
damaged or destroyed by electrostatic
discharge. When handling the device, observe
the necessary safety precautions against
electrostatic discharge (ESD) according to
EN 61340-5-1 and EN 61340-5-2.
WARNING: Risk of explosion
When being used as equipment in
Zone 2,
the
electronic module must
not be disconnected
from the base element while it is still
live.
Connecting and disconnecting cables for
non-intrinsically safe circuits
is only permitted
if they are not live.
OUT
PI-EX-TB basic
terminal block
+ -
- +- +
+
-
20...30 V DC
UB+
UB-
UB+
UB-
IN
10
10
UB+
UB-
1
8
STAT
11
PI-EX-SD-2x-xx
ERR
3
5
6
2
7
PI-EX-SD-21-25
4
The PI-EX-SD-21-25 can be installed in the safe area or
in Zone 2.
6.1
Base Elements
Figure 2
1
2
3
4
5
7
8
9
0
!
Structure
Output "+"
Output "–"
Input signal "+"
Input signal "–"
1
–
4
Terminal screw with integrated test socket
6
Not used
Isolating connectors
Test sockets
Locking clips
Keying pin
Status indicators
The device is designed for installation in the control cabinet
and must be plugged into a base element (basic terminal
block, electronics base, or motherboard). Incorrect
connection of the electronic module is prevented by a
keyway in the base element and bars in the housing. A
locking clip
9
is provided in order to prevent accidental
removal. To remove the electronic module, gently press the
locking clip towards the housing; it can then be removed.
WARNING: Risk of explosion
If the
device has been used in
non-intrinsically safe circuits,
it must
not
be
used again in intrinsically safe circuits.
Clearly label the module as being
non-intrinsically safe.
Connection cross section
(solid and stranded):
Tightening torque:
0.2 mm
2
- 2.5 mm
2
0.5 Nm - 0.6 Nm
Dimensions
PI-EX-SD-21-25
Basic
terminal
block
Figure 3
Dimensions (in mm)
103211_00_en
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5
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