F 3224A (0507)
All rights reserved. Equipment subject to change without notice: 1/7
HIMA Paul Hildebrandt GmbH + Co KG, P.O. Box 1261, 68777 Brühl
F 3224A
F 3224: 4-channel input module
for intrinsically safe circuits (Ex)i, with safety isolation
for proximity switches according to EN 60947-5-6 (NAMUR) and contacts
with wire break monitoring
EC-Type-Examination Certificate: PTB 02 ATEX 2178
Block diagram
Switching point 1.65 mA ± 0.2 mA (at 8.2 V)
Switching current difference approx. 0.2 mA
Switching time approx. 10 ms
Proximity switch supply 7.7...9 V
Resistor RB 8.2 kOhm up to 15 kOhm
Space requirement 4 SU
Operating data 5 V DC, 5 mA
24 V DC, 90 mA
Z 7114 / 3224A / …
F 3224A
Z 7114 / 3224A
proximity switches
I/O-BUS
or
contacts
Front
cable plug
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Lead marking for cable plug
Z 7114 / 3224A / C.. grey or
Z 7114 / 3224A / ExC.. blue
Funktionstabelle
Channel Connection Colour
1
2
3
4
d2
d4
d8
d10
d20
d22
d26
d28
WH
BN
GN
YE
GY
PK
BU
RD
Cable
LiYY 8 x 0.5 mm2
Input
d4 - d2
d10 - d8
d22 - d20
d28 - d26
Input current
IE in mA
LED
z4 - z2
z10 - z8
z22 - z20
z28 - z26
Control channel
1
2
3
4
- +
- +
> 2,1
< 1,2
H signal
L signal
Sensitivity range 0,05 … 0,35 L signal
Line break monitoring
5 (for channel 1)
6 (for channel 2)
7 (for channel 3)
8 (for channel 4)
H signal
H signal
L signal
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1 Operating Instructions
1.1 Application
The module is used to evaluate proximity switches (according to NAMUR) or contacts in intrinsically
safe circuits (Ex)i.
The proximity switches or contacts can be installed in hazardous areas from zone 0 on.
1.2 Electrical specifications concerning intrinsic safety
For these specifications please refer to the EC-Type-Examination certificate (PTB 02 ATEX
2178) enclosed.
In case of the parallel connection of two outputs:
1.3 Assembly
The module is mounted in a 19” subrack. The mounting position must be vertically. The design
of the subrack must allow heat dissipation.
The module is connected to the intrinsically safe field circuits via the cable plug Z 7114.
Further information for assembly and installation:
see HIMA Manual (catalog) "The H41q and H51q System Families".
Note The connection of a mechanical sensor requires a resistor (8,2kOhm
to 15 kOhm), connected in parallel directly at the sensor to avoid an
input line break signal.
The module may not be mounted in hazardous areas.
The F 3224A input channels may not be exposed to external voltage.
Modules, which were operated in general electrical systems, may not
be used in Ex-plants thereafter.
Io = 2 x 10 mA = 20 mA
Po = 2 x 23 mW = 46 mW
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1.4 Installation
• The electronic module including its connections has to be installed in a way that at least
the system of protection IP 20 according to EN 60529: 1991 + A1: 2000 is achieved.
• Two intrinsically safe input circuits of two F 3224A modules can be wired in parallel.
The reduced maximum values (C0,L0) due to this method of connection have to be considered.
• The separation between intrinsically safe and non-intrinsically safe terminals must be
≥ 50 mm (filament dimension).
• The separation between adjacent intrinsically safe terminals must be ≥ 6 mm (filament
dimension.
• Intrinsically safe and not intrinsically safe lines must be installed separately, or the
intrinsically safe lines must be provided with additional insulation.
• Intrinsically safe lines must be identifiable, e. g. by a light blue colour (RAL 5015) of the
insulation.
• The wiring has to be secured mechanically in a way which ensures that in the event of
an accidental disconnection, the distance (EN 50 020/ Part 7, Table 4) between the
intrinsically safe and not intrinsically safe connections does not fall below the required
minimum (e.g. by bundling).
The lines used must comply with the following insulation test voltages:
• Intrinsically safe lines ≥ 500 VAC
• Not intrinsically safe lines ≥ 1500 VAC
For stranded wires, the line ends must be provided with wire end ferrules. The terminals must
be suitable for clamping the wire cross section.
The applicable regulations and standards have to be complied with, especially
• EN 50014: 1997 + Corrigedum: 1998 + A1: 1999 + A2: 1999
(VDE 0170/0171, Part 1: 2000, DIN EN 50014: 2000-02)
• EN 50020: 1994
(VDE 0170/0171, Part 7: 1996, DIN EN 50020: 1996-04)
• EN 60079-14: 1997
(VDE 0165 Part 1, DIN EN 60079-14: 1998-08)
1.5 System start-up
Prior to the first system start-up, an Ex-expert has to check the correct installation of the system,
especially the supply voltage connections and the connections for the intrinsically safe
circuits.
1.6 Maintenance
In case of a failure, the defective module must be replaced with the same, or with another approved
type.
Any repair work must only be carried out by the manufacturer!
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