F 3238 (0606)
All rights reserved. Equipment subject to change without notice: 1/10
HIMA Paul Hildebrandt GmbH + Co KG, P.O. Box 1261, 68777 Brühl
F 3238
F 3238: 8-channel input module (Ex)i
safety-related, TÜV certified according to IEC 61508 for applications up to SIL 3
• for the connection of safety-related proximity switches (P+F),
proximity switches according to EN 60947-5-6 (NAMUR) and contacts
with resistor network
• for intrinsically safe circuits (Ex)i, with sensor supply, with safe isolation
• monitoring of the lines for short circuit and line break
EC-Type Examination certificate: PTB 03 ATEX 2031
Figure 1: Block diagram and front cable plug
Appertaining function block: HB-RTE-3
Switching time approx. 10 ms
Switching threshold IE 0-signal:0.35 ≤ IE ≤ 1.2 mA
1-signal:2.1 ≤ IE ≤ 6.0 mA
Wire break ≤ 0.28 mA
Short circuit ≥ 6.5 mA
Line impedance ≤ 50 Ω (acc. EN 60947-5-6: 2000)
Line length ≤ 1000 m (∅ = 0.5 mm2)
Supply voltage US approx. 8.2 V
Shunt R* 681 Ω
Space requirement 8 SU
Operating data 5 VDC, 150 mA
24 VDC, 100 mA
Front
cable plug
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The module is tested completely during operation.
The main test routines are:
• Switch-on and switch-off capability
• Crosstalk on the input circuits by walking-zero
• Functions of the input filters
• Correct function of the module
• Short circuit and wire break of the sensor line
The LEDs are not tested.
Figure 2: Connection wiring
* The connections (X4) to (X32) are only used at special cable connectors.
Termination of not used inputs
Figure 3: Resistor circuit for the inputs
Note Not used inputs, which are connected in the HIMA function block HBRTE-
3, must be terminated with a 10 kΩ resistor at the input of the
module. Thereby line error messages of the not used input channels
are eliminated (see following scheme).
Channel Connection Color
1 d2
d4 (x4)*
WH
BN
2 d6
d8 (x8)*
GN
YE
3 d10
d12 (x12)*
GY
PK
4 d14
d16 (x16)*
BU
RD
5 d18
d20 (x20)*
BK
VT
6 d22
d24 (x24)*
WHBN
WHGN
7 d26
d28 (x28)*
WHYE
WHGY
8 d30
d32 (x32)*
WHPK
WHBU
Assembly cable plug Z 7204
.
Cable
LiYY
16 x 0.5 mm2
Lead marking cable plug
Z 7008 / 3238 / C.. gray or
Z 7008 / 3238 / ExC.. blue
d2 d4 d20
channel 1 channel 5
Example:
Channel 1 and channel 5 are not used.
Termination of channel 1 (connections d2-d4) and
channel 5 (connections d18-d20) each with 10 kΩ.
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1 Operating Instructions
1.1 Application
The module is used to evaluate proximity switches (according to NAMUR) or contacts with resistor
network, in intrinsically safe circuits (Ex)i.
The proximity switches or contacts can be installed in hazardous areas from Zone 0 on, if certified.
1.2 Electrical specifications concerning intrinsic safety
For these specifications please refer to the EC-Type-Examination certificate enclosed.
1.3 Assembly
The module must not be mounted in hazardous areas.
The module is mounted in a 19” subrack. It must be plugged in 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 7008.
1.4 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.
1.5 Notes on project engineering
Appertaining software function block: HB-RTE-3 (for latest version refer to the description of
the operating system).
Module in Surface Mounted Device (SMD) technology (AS03) usable with BS41q/51q V7.0-7
or newer.
Note for use in (Ex)i circuits: No restrictions about type of module adjacent to F 3238.
The input channels must not be exposed to external voltage.
Modules, which were operated in general electrical systems, must not
be used in (Ex)i-applications thereafter.
In addition, only the applications described in this data sheet are
admissible.
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Redundant connection for a safety-related proximity switch
Figure 4: Redundant connection for a safety-related proximity switch
Cable plug: Z7008 / 3238 / Ex / C..
HIMA order no.: 93 3238 100
Connection for proximity switches NAMUR
(according to EN 60947-5-6: 2000)
R** is also necessary in mono applications!
Figure 5: Redundant connection for a proximity switch NAMUR
(according to EN 60947-5-6: 2000)
Special cable plug: Z7008 / 3238 / Ex / C../ S101 (mono connection)
HIMA order no.: 93 3238 101
At redundant connection of proximity switches NAMUR (according to EN 60947-5-6) the following
redundant special cable plug must be used:
Z7008 / 3238 / Ex / W / R1 / S301 with resistors R1..R8=390 Ω for NAMUR proximity switches
Z7008 / 3238 / Ex / Cx / R2 / S301
HIMA order no.: 93 3238 301
Between the plug R2 and R1 (see Figure 4) the connections are configured as single cores.
Note If using the special cable plug for Namur proximity switches in the safety
loop (module - proximity switch) the SIL level may be reduced to that
of the proximity switch.
contacts with resistor network
Special cable
connector
Special cable
connector
HIMA part no.
000552391
Proximity switch acc. to NAMUR
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Figure 6: Cable connector Z 7008 (special design for NAMUR)
1.6 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.
• If two intrinsically safe input circuits of two F 3238 modules are wired in parallel, a special
cable provided by HIMA, must be used.
• The separation between intrinsically safe and not intrinsically safe terminals must be
≥ 50 mm, especially between adjacent modules.
• The separation between adjacent intrinsically safe terminals must be ≥ 6 mm.
• 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 color (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 cables/ wires used must comply with the following dielectric withstand test:
• Intrinsically safe lines ≥ 1000 VAC
• Not intrinsically safe lines ≥ 1500 VAC
For stranded wires, suitable measures must be applied to prevent spreading at the end of wire.
The terminals must be suitable for clamping the wire cross section.
Resistors R*:
R17-R24: 681 Ω
Resistors R**:
R1-R8: 390 Ω
R*
R*
R*
R*
R**
R*
R**
R**
R*
R**
R*
R*
R**
R**
R**
R**
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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 50039: 1980
(VDE 0170/0171, Part 10: 1982, DIN EN 50039: 1982-04)
• EN 60079-14: 1997
(VDE 0165 Part 1, DIN EN 60079-14: 1998-08)
• EN 60947-5-6: 2000
(VDE 0660 Part 212, DIN EN 60947-5-6: 2000-12)
1.7 Maintenance
In case of a failure, the defective module must be replaced with the same, or with another approved
type.
Note For further information on assembly and installation see the HIMA catalog
"The H41q and H51q System Families".
Any repair work must only be carried out by the manufacturer.
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