PD
3240 ANALOG INTERFACE MODULE
FEATURES
*16 analog input channels.
*High resolution (14 bit)
*Current input (0-20 or 4-20 mA).
*Filtered input signals
*Suppression of 50 and 60Hz interference
*Limit switches for each channel
*Advanced self testing facility
*Overload protection
*P-NET Fieldbus communication
*Watchdog Timer
*Rail mounting module (DIN / EN)
*EMC approved (89/336/EEC)
APPLICATION:
The PD 3240 Analog Interface Module
is one of a collection of distributed process control units, intended for use
within the P-NET Fieldbus. It provides a versatile interface between measurement
transducers generating analogue current signals, such as temperature
transmitters, pressure, density and level sensors, flow meters, etc., and
distributed master control computers.
PD 3240 provides internal conversion of measurement into any engineering unit
representing the analog process being monitored and controlled, for direct
interrogation by central control or any master unit connected to the P-NET
Fieldbus system.
The compact design and the outstanding environmental specifications for the
Analog Interface Module, makes it an ideal process component in industrial as
well as other environments.
SYSTEM DESCRIPTION:
The PD 3240 Analog Interface Module
is an intelligent module, provided with 16 analog input channels for 0-20 mA or
4-20 mA and a communication interface for the P-NET Fieldbus.
The PD 3240 Analog Interface Module utilizes 4 analog to digital converters,
using a fully integrating principle. Each measurement is integrated over a 100
ms period, which reduces noise influence and results in a very stable reading of
the input signal. The input signals are galvanically separated from the power
supply.
The unit offers comprehensive self-testing features, which enables reporting of
disconnection, overload and process failure. All inputs are protected against
overload. The selectable watchdog timer creates an internal error message during
a communications or power failure.
An incorporate filtered power supply
provides a high degree of interference suppression, allowing use of low grade
power services. The DC supply may be used for powering external transducers.
The input signals are filtered, and suppressed against 50 and 60 Hz
interference. An additional filter may be applied to the input signal. The
filter time constant is configurable for each channel.
Each channel may be configured for input simulation. In this mode, no
measurement value will be calculated, and it is possible for the user to insert
any value in this register.
As a distributed module, the unit can be mounted close to the process. Data
communications with Controllers are made with a single P-NET cable having a ring
length of over 1 km. This reduces plant wiring costs to a minimum.
The module may be plugged directly onto a mounting rail (EN 50 022 / DIN 46277)
in a panel configuration or in a box designed for the plant environment. The
module may be removed for service without interference with operational
activities on the rest of the network. 2 snap connectors provide the terminals
for field connection, power and communication.
SPECIFICATIONS (all
specifications are respected in the approved EMI conditions):
Analog input (0-20mA, 4-20mA):
Measurement error :
@ 0°C to 50°C max. 0.1 % of act. 2 µA
@ -25°C to 70°C max. 0.3 % of act. 2 µA
Resolution
:
1
µA
Scale Drawing (in mm)
Repeatability
:
2 µA
Voltagedrop at 20 mA :
max. 1.4
V
Current input measurement update
time:
channel 1
-4enabled:
0.6 s
channel 1
-8enabled:
0.9 s
channel 1
-12enabled:
1.2 s
channel 1
-16enabled:
1.5 s
Power Supply:
Voltage:
24V DC 15 %
Consumption:
max.
1.3 W
Ambient Temperature:
Operation:
-25 °C to +70 °C
Storage:
-40 °C to +85 °C
PD 3240 is approved in compliance with the EMC-directive no 89/336/EEC. Test
limits are determined by the generic standards EN 50081-1 for emission and PrEN
50082-2 for immunity. PD 3240 is approved in compliance with the IEC 68-2-6 Test
Fc standard for vibration .
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