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2865201

P1-P3P4-P6P7-P9P10-P10
PI-EX-SD-21-25
103211_00_en PHOENIX CONTACT 4
4 Safety Regulations and Installation Notes
4.1 Installation and Operation
Follow the installation instructions.
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.
Do not repair the device yourself, but replace it with an
equivalent device. Repairs may only be carried out by the
manufacturer.
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
The safety data may be derived from the operating
instructions and the certificates (EC type examination
certificate; additional certificates if necessary).
Installation in Zone 2
Observe the specified conditions for use in potentially
explosive areas.
Installation in Areas With 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)
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.
Installation, operation, and maintenance may
only be carried out by qualified specialist
personnel.
Access to the circuits within the device is
prohibited.
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.
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.
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.
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).
WARNING: Risk of explosion
The device is not designed for use in areas
where there is a danger of dust explosions.
PI-EX-SD-21-25
103211_00_en PHOENIX CONTACT 5
5 Structure
Figure 2 Structure
1 Output "+"
2 Output "–"
3 Input signal "+"
4 Input signal "–"
1 – 4 Terminal screw with integrated test socket
56 Not used
7 Isolating connectors
8 Test sockets
9 Locking clips
0 Keying pin
! Status indicators
Dimensions
Figure 3 Dimensions (in mm)
6 Installation
6.1 Base Elements
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.
+
-
UB+
UB-
UB+
UB-
UB+
UB-
9
10
-
++
-
1
2
8
7
4
6
5
3
20...30 V DC
+
-
IN
OUT
PI-EX-SD-2x-xx
STAT
ERR
11
10
PI-EX-TB basic
terminal block
PI-EX-SD-21-25
The PI-EX-SD-21-25 can be installed in the safe area or
in Zone 2.
PI-EX-SD-21-25
Basic
terminal
block
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.
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): 0.2 mm
2
- 2.5 mm
2
Tightening torque: 0.5 Nm - 0.6 Nm
PI-EX-SD-21-25
103211_00_en PHOENIX CONTACT 6
6.2 Automatic Keying of the Electronic Modules
The base element is not keyed upon delivery. The
user-friendly keying is located in the electronic module and
consists of four plastic parts, which are joined together. The
first time the electronic module is removed, the bottom part
of the keying pins (0 in Figure 2 on page 5) remains in the
base element. In this way, it is automatically keyed to the
relevant electronic module.
If an electronic module is accidentally inserted in the wrong
place, any plastic parts remaining in the base element can
be removed using a screwdriver.
7 Comparison of Safety Data
Safety data of the
For the values for U
o
, I
o
, P
o
, L
o
, and C
o
, please refer to
"Safety Data According to ATEX for Intrinsically Safe
Circuits" on page 3.
Capacitances and Inductances of Base Elements
Ex i Prerequisites:
8 Calculation of a Valve Circuit
Figure 4 Equivalent circuit
In order to connect a solenoid valve to the device, it is
necessary to compare the safety data and calculate the
measurements.
R
SV
and U
SV
are dependent on the ambient temperature
due to the copper resistance.
The values of R
SV
and I
SV
must be found out from the valve
manufacturer. The values for R
i
and
U
V
can be found in the
technical data under "Output" on page 2.
On the basis of this, the permissible conductor resistance
can be calculated according to the formula below:
Where negative resistance occurs, it is no longer possible
to guarantee that the connection will function.
Function prerequisites: I
V
≥ I
SV
and R
C
> 0 Ω.
Automatic keying Electronic module Base element
View from below
(locking clip to the
right)
View from above
(isolating connector to the
left)
Input Output Input Output
PI-EX-SD-21-25
Compare the safety data before connecting a
device in the Ex-i area to the PI-EX-SD-21-25.
Please also observe the internal capacitance
and inductance of the base elements.
Field devices: U
i
, I
i
,
P
i
, L
i
, C
i
Solenoid driver: U
o
,
I
o
,
P
o
, L
o
, C
o
Base elements: L
iB
,
C
iB,
PI-EX-TB
PI-EX-TB/T
TT-PI-EX-TB
TT-PI-EX-TB/T
Motherboards
Electronics
bases
L
iB
1 μH 1 μH0 μH
C
iB
1 nF 3 nF 0 nF
U
i
≥ U
o
I
i
≥ I
o
P
i
≥ P
o
L
i
+ L
c
+ L
iB
≤ L
o
(L
c
and
C
c
are
dependent on the
cables/lines used.)
C
i
+ C
c
+ C
iB
≤ C
o
R
i
: Internal resistance of solenoid driver
U
V
: Guaranteed voltage of the solenoid driver without
load
I
V
: Maximum current that can be supplied by the
solenoid driver
R
C
: Maximum permissible conductor resistance when
connecting the solenoid driver and valve
R
SV
: Effective coil resistance of the solenoid valve (the
copper resistance of the coil depends on the
temperature)
I
SV
: The current required by the solenoid coil so that the
valve can close tightly
U
SV
: The voltage which is applied across the coil with I
SV
Recommendation:
For R
C
, the actual conductor
resistance +25 Ω is to be
calculated.
You can obtain a list of suitable valves from the
Download Center at
www.download.phoenixcontact.com.
SV
I
I
R
SV
U
C
R
SV
R
V
U
ValveSolenoid driver
U
V
R
C
=––– R
i
– R
SV
I
SV
P1-P3P4-P6P7-P9P10-P10

2865201

Mfr. #:
Buy 2865201
Manufacturer:
Phoenix Contact
Description:
Antennas PI-EX-SD-21-25
Lifecycle:
New from this manufacturer.
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