BEKA BA3400 Series User manual

1. INTRODUCTION
The BA3400 series plug-in DI (Digital Input) modules are
part of the BEKA Pageant Display system. Two models
are available:
BA3401 8 contact inputs
BA3402 8 NAMUR 2-wire inputs
Both models have IECEx, ATEX and UKCA intrinsic safety
apparatus certication.
The DI modules plug into any of the seven module sockets
at the rear of the BA3101 Pageant Operator Display.
Power for the module is provided by the BA3101 Operator
Display which determines the modules response speed.
If required multiple DI modules may be plugged into an
Operator Display.
Fig 1 shows a BA3400 DI plug-in module with its features
identied.
Each of the eight inputs is a separate intrinsically safe
circuit but they are not isolated from each other. Inputs
should therefore only be connected to isolated sensors and
wiring such as reed relays, switch contacts and proximity
detectors. The BA3402 can power and monitor the status
of 2-wire NAMUR compliant sensors, such as proximity
detectors. It may also be used to monitor switch status in
noisy environments.
In addition to their normal function, inputs 7 and 8 may
be used for the decoding a quadrature signal from a plant
position sensor or a BEKA BA490 rotary encoder.
BA3401
Certification
information
label
8 pairs of
input terminals
Fig 1 BA3400 series plug-in DI module
2. INTRINSIC SAFETY CERTIFICATION
Notied Body CML B.V. and UK Approved Body Eurons
CML have issued the BA3400 series plug-in DI modules
with the following apparatus certicates:
IECEx IECEx CML 21.0004X
ATEX CML 21ATEX2110X
UKCA CML 21UKEX2111X
The ATEX certicate has been used to conrm compliance
with the European ATEXr Directive for Group II, Category
1GD equipment, similarly the UKCA certicate has been
used to conrm compliance with UK statutory requirements.
All BA3400 series DI modules carry both the CE and
UKCA marks, subject to local codes of practice, they may
be installed in any of the European Economic Area (EEA)
member countries and in the UK. ATEX certicates are
also acceptable for installations in some non EU countries.
These instructions describe IECEx, ATEX and UKCA
installations which conform with IEC / EN 60079-14
Electrical installations design, selection and erection.
When designing systems the local code of practice should
be consulted.
Instructions for BA3400 series
Pageant plug-in
Digital Input modules
Issue 3
22nd February 2023
BEKA associates Ltd. Old Charlton Rd, Hitchin, Hertfordshire,
SG5 2DA, UK Tel: [phone] e-mail: [email protected]
web: www.beka.co.uk
BA3401
Plug-in BA3400 series Pageant DI Modules are CE marked to show compliance with the European
Explosive Atmospheres Directive 2014/34/EU and the European EMC Directive 2014/30/EU.
The modules are also UKCA marked to show compliance with UK statutory requirements Equipment and
Protective Systems Intended for Use in Potentially Explosive Atmospheres Regulations UKSI 2016:1107
(as amended) and with the Electromagnetic Compatibility Regulations UKSI 2016:1091 (as amended).

2.1 Zones, gas groups and T rating
All of the BA3400 series DI certicates specify the same
certication codes:
BA3401 BA3402
Ex ia IIC T4 Ga Ex ia IIC T4 Ga
Ex ia IIIC T135°C Da* Ex ia IIIC T195°C Da*
-40°C ≤ Ta ≤ 65°C -40°C ≤ Ta ≤ 65°C
* Dust certication requires the Pageant Operator Panel
and the BA3400 series DI module to have a minimum
additional IP54 rear protection.
2.2 Special conditions for safe use
i. Under certain extreme circumstances, the non-
metallic parts incorporated in the enclosure of this
equipment may generate an ignition-capable level
of electrostatic charge. Therefore, the equipment
shall not be installed in a location where the
external conditions are conducive to the build-up of
electrostatic charge on such surfaces. In addition, the
equipment shall only be cleaned with a damp cloth.
ii. In installations requiring EPL Da, Db, or Dc, the
equipment shall be mounted to an enclosure which
provides a minimum degree of protection of IP5X and
which meets the requirements of EN60079-0 Clause
8.4 (material composition requirements for metallic
enclosures for Group III) and/or EN60079-0 Clause
7.4.3 (Avoidance of a build up of electrostatic charge
for Group III) as appropriate. All cable entries into
the equipment shall be made via cable glands which
provided a minimum degree of protection of IP5X.
iii. The BA3400 series shall only be used as part of a
BEKA Pageant System.
2.3 Certication label information
The certication information label is tted to the side
of the BA3400 series plug-in DI module. It shows the
model number, certication information, BEKA associates
address and year of manufacture together with the serial
number.
BA3401 certication Information Label
BA3401
BA3XXX
BA3101 Pageant
Operator Display
When module has been inserted
tighten two captive screws
CPU Module
plugged into
'C' socket
Insert
BA3400
series module
Fig 2 Inserting BA3400 series DI module into
one of the seven sockets
3. I NSTALLATION
The BA3400 series plug-in DI module should be tted into
one of the seven sockets at the rear of a BA3101 Pageant
Operator Panel as shown in Fig 2.
For a hazardous area installation the plug-in DI module
must be manufactured by BEKA and have certication that
species that it shall be used as part of a BEKA Pageant
system.
3.1 Power consumption
The intrinsic safety certication of the BA3400 series plug-
in modules permits any combination to be installed in a
Pageant BA3101 display but there are power limitations.
The percentage of the total available power that these
modules consumes is:
BA3401 8 contact inputs 4%
BA3402 8 NAMUR 2-wire inputs 40%
The sum of the percentage power consumption’s of all the
plug-in modules installed in a BA3101 display must not
exceed 100%.
+
+
Channels 7 and 8 may
be used as two separate
inputs, or together as a
single quadrature input.
Channel 1
+
1
2
+
+
+
+
+
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
1
2
1
2
1
2
1
2
1
2
1
2
1
2
Fig 3 Input terminals
2

3.2 BA3400 series plug-in DI module Installation
1. The BA3400 series DI module may be tted before or
after the Operator Panel is installed. The Operator
Panel should not be powered when the module is
tted.
2.Carefully insert the DI module into the selected slot
at the rear of the BA3101 Pageant Operator Panel.
When correctly positioned secure the module by
tightening the two captive module xing screws.
3. Connect eld wiring to each of the eight pairs of
removable input terminals shown in Fig 3. Each
input is a separate intrinsically safe circuit and eld
wiring should comply with segregation requirements
specied in IEC/EN 60079-14. If a multicore cable
is used for the inputs, it should have Type A or B
construction as specied in Clause 16.2.2.7 of IEC/
EN 60079-14 Wiring should be supported to avoid
damaging the module’s terminals.
4. INPUTS
Both models have eight inputs which are not isolated from
each other and should therefore only be connected to
isolated sensors. The BA3401 should be used for contact
and open collector inputs and the BA3402 for NAMUR
compliant 2-wire sensors and for contact and open
collector inputs in noisy environments.
4.1 BA3401 inputs
Each of the eight inputs has the following electrical
specication allowing it to sense the status of a wide range
of switch contacts and sensors with open collector outputs.
Sensing voltage 3.3V
Sensing Current 33µA
Switching threshold
Closed < 25kW
Open >35kW
Frequency Inputs polled 10 times
per second by BA3101
Operator Panel.
Sensor with
open collector
output
Switch
contact
Channel 1
input
terminals
OR 1
2
+
Fig 4 BA3401 switch contact or open collector
connected to channel one input
The intrinsic safety parameters for each input are not
restrictive as for intrinsic safety purposes the output current
Io is considered to be zero.
Therefore the maximum inductance that may be
connected Lo is not specied, the cable length between
the BA3401 input terminals and the sensor is only limited
by the permitted capacitance Co which is extremely large.
Ui = 0
Uo = 4.94V
Io = 0
Po = 0
Co = 100µF for IIC
Any mechanically or magnetically activated switch contact
located in the same hazardous area as the BA3401 may
be directly connected to any of the eight input channels
providing the switch and associated wiring can withstand a
500V insulation test to earth. Most magnetically activated
reed relays comply with these requirements. Most certied
intrinsically safe sensors with an open collector output
can also be connected to any of the eight input channels,
providing the sensor output is compatible with the sensing
voltage and current.
4.1.1 BA3401 quadrature input
Input channels 7 and 8 may be used together for decoding
a quadrature signal from a plant position sensor or a
BEKA BA490 rotary encoder. Fig 5 shows the required
connections.
Sensor with
quadrature
output
Channel 7
A
1
+
2
B
C
1
+
2
Channel 8
Fig 5 Connections for sensor with a quadrature output
Open
Closed
Open
Closed
Contact B
Counter
input
pulses
Contact A
Clockwise rotation
90°
Fig 6 Quadrature sensor waveforms
3

Unlike most quadrature inputs which produce one
incrementing or decrementing input pulse for each A + B
cycle, the BA3401 produces four as shown in Fig 6 which
results in increased resolution.
Sensing voltage 3.3V
Sensing Current 33µA
Switching threshold
Closed <25kW
Open >35kW
Frequency 1kHz max
Counter polled 10 times per
second by BA3101 Operator
Panel.
The intrinsic safety parameters for the quadrature input
are the same as those for a single input shown in 4.1 and
are again not restrictive.
The quadrature sensor and associated wiring should be
able to withstand a 500V rms insulation test to earth.
4.2 BA3402 inputs
Each of the eight inputs has the following electrical
specication allowing it to sense the status of a wide range
of 2-wire NAMUR compliant sensors such as proximity
detectors. The BA3402 may also be used for monitoring
the status of switch contacts and sensors with open
collector outputs in high noise environments.
Sensing voltage 8.2V
Switching threshold Lower Upper
Proximity detector 1.2mA 2.1mA
Contact 2.6kW5.5kW
Frequency Inputs polled 10 times per
second by BA3101 Operator
Panel.
The intrinsic safety parameters for each input are shown
below.
Ui = 0
Uo = 8.8V
Io = 7.4mA
Po = 16mW
Co = 5.5µF for IIC
Lo = 556mH for IIC
Almost any certied intrinsically safe 2-wire NAMUR
compliant sensor located in the same hazardous area as
the BA3402 may be directly connected to any of the eight
input channels. The Ci and Li of the sensor, plus the cable
capacitance and inductance, should be less than Co and
Lo of the BA3402 input .
The sensor and wiring should be able to withstand a 500V
rms insulation test to earth.
NAMUR 2-wire
proximity
detector
Channel 1
input
terminals
+1
2
Fig 7 BA3402 2-wire NAMUR proximity detector
connected to channel one input
Because the BA3402 has higher noise immunity than the
BA3401, it should be used in preference to the BA3401
for switch contact monitoring in noisy environments. A
switch contact located in the same hazardous area as
the BA3402 may be connected to any of the eight input
channels providing the switch and associated wiring can
withstand a 500V insulation test to earth.
Most certied intrinsically safe sensors with an open
collector output can also be connected to any of the inputs,
providing the sensor output is compatible with the BA3402
sensing voltage and 500V isolation is maintained.
4.2.1 BA3402 quadrature input
Input channels 7 and 8 may be used together for decoding
a quadrature signal generated by a certied sensor with a
quadrature output, or from two separate sensors having a
90º phase difference. Connections and waveforms are
as shown in Figs 8 and 9.
Sensor with
quadrature
output
Channel 7
A
1
+
2
B
C
1
+
2
Channel 8
Fig 8 Connections for sensor with a quadrature output
4

Open
Closed
Open
Closed
Contact B
Counter
input
pulses
Contact A
Clockwise rotation
90°
Fig 9 Quadrature sensor waveforms
Unlike most quadrature inputs which produce one
incrementing or decrementing input pulse for each A + B
cycle, the BA3402 produces four as shown in Fig 9 which
results in increased resolution.
Sensing voltage 8.2V
Switching threshold Lower Upper
Proximity detector 1.2mA 2.1mA
Contact 2.6kW5.5kW
Frequency 1kHz max
Counter polled 10 times per
second by BA3101 Operator
Panel.
The intrinsic safety parameters for the quadrature input
are the same as those for a single input shown in 4.2.
The quadrature sensor and associated wiring should be
able to withstand a 500V rms insulation test to earth.
.
5. MAINTENANCE
BA3400 series DI input module should be regularly
inspected to ensure that it has not been damaged. The
frequency of inspection depends upon environmental
conditions.
No attempt should be made to repair a faulty BA3400
series plug-in DI module. Suspect modules should be
returned to BEKA associates or your local BEKA agent.
6. GUARANTEE
BA3400 series DI modules which fail within the guarantee
period should be returned to BEKA associates or your
local BEKA agent. It is helpful if a brief description of the
fault symptoms is provided.
7. CUSTOMER COMMENTS
BEKA associates are always pleased to receive comments
from customers about our products and services. All
communications are acknowledged and whenever
possible, suggestions are implemented.
5

APPENDIX 1
BA3400 Series Pageant Digital Input Modules
Codesys Mapping and Parameters
The Pageant Codesys Quick Start Guide which can be
downloaded from the BEKA website https://www.beka.
co.uk/manuals/pageant_codesys_quick_start_guide.pdf
explains how to setup the CODESYS v3 environment to
work with a BEKA Pageant Operator Panel and to start
developing PLC applications.
The BEKA Quick Start Guide is not a programming
manual, for detailed documentation about the
CODESYS v3 development system please refer to
https:/www.codesys.com and to the on-line help.
The following table lists the BA3400 series Pageant Digital
Input Modules Codesys parameters that can be set and
mapped during the initialisation of the PLC application
which is described in the BEKA Quick Start Guide. If
the values are not set in the Codesys project, the default
values will be used.
The bidirectional channels are both read and write, the
value written by the application is cleared once processed
by the module.
6
Channel or
Parameter Name Type Default Variable Type Range Description
Quadrature Control Parameter (1) Disabled Enumeration
Of BYTE
Enabled
Disabled Enable Quadrature on Inputs 7 and 8
Clear Bidirectional (2) N/A BYTE 0..255 Any value > 0 will clear the Quadrature Count
Quadrature Count Input N/A INT -32768..32767
Current Quadrature Count, Always 0 if
Disabled
This counter will roll-over if it reaches 32767
in the forward direction or -32768 in the
backward direction
Input Values Input N/A BYTE 0...255
Bit Field:
Bit7…Bit0 represent the value for Input 8 to 1
0: Input Low 1: Input High
BA3401 – DI MODULE
BA3400 Series Digital Input Modules Codesys Mapping and Parameters
Notes
(1) Parameters are only set during the initialisation of the PLC application, if the value is not set in the CODESYS
project, the default value will be used.
(2) These bidirectional channels are both write and read, the value written by the application is cleared once processed
by the module.

7
Channel or Parameter
Name Type Default Variable Type Range Description
Quadrature Control Parameter (1) Disabled Enumeration
Of BYTE
Enabled
Disabled Enable Quadrature on Inputs 7 and 8
Input 1 Fault Detection Control
Parameter (1) 1BOOL 0..1 0: Fault Detection Disabled,
1: Fault Detection Enabled
Input 2 Fault Detection Control
Input 3 Fault Detection Control
Input 4 Fault Detection Control
Input 5 Fault Detection Control
Input 6 Fault Detection Control
Input 7 Fault Detection Control
Input 8 Fault Detection Control
Clear Bidirectional (2) N/A BYTE 0..255 Any value > 0 will clear the Quadrature
Count
Quadrature Count Input N/A INT -32768..32767
This counter will roll-over if it reaches
32767 in the forward direction or -32768
in the backward direction
Input Values Input N/A BYTE 0...255
Bit Field:
Bit7…Bit0 represent the value for Input 8 to 1
0: Input Low 1: Input High
BA3402 – DI MODULE NAMUR
Notes
(1) Parameters are only set during the initialisation of the PLC application, if the value is not set in the CODESYS
project, the default value will be used.
(2) These bidirectional channels are both write and read, the value written by the application is cleared once processed
by the module.

8
Old Charlton Rd, Hitchin, Hertfordshire, SG5 2DA, UK
Tel: [phone] e-mail: [email protected]
web: www.beka.co.uk
All associated manuals, certificates, and
datasheets can be downloaded from
https://www.beka.co.uk/qr-ba3100