EN 50325-3-2001 pdf download.Industrial communications subsystem based on ISO 11898 (CAN) for controller-device interfaces — Part 3: Smart Distributed System (SDS).
8.3 Electromagnetic Compatibility (EMC)
8.3.1 General requirements for electromagnetic compatibility tests
The operating characteristics of SDS shall be maintained at the specified levels of electromagnetic interference (EMI).
The SDS device to be tested shall have all the essential design details of the type which it represents and shall be in a clean and new condition. Maintenance or replacement of parts during or after a testing cycle is not permitted.
Compliance with this requirement can be demonstrated using a network comprising one controller, one device and one power supply.
8.3.2 General test conditions for electromagnetic compatibility tests
Unless otherwise stated the tests shall be carried out at an ambient temperature of +23 ± 50 C.
The tests shall be performed under the following conditions:
The SDS device mounted in free air shall be connected to the SOS line and supplied with its rated operational voltage. Terminals and connectors, if any, shall be connected with the intended sensors or actuators according to the manufactures instructions. The test shall be performed at each baud rate.
8.3.3 Immunity requirements
8.3.3.1 Performance criteria
8.3.3.1.1 Performance criteria A
The test specimen shall continue to operate as intended during and after the test.
No change of operating state or stored data is allowed within the equipment under test (EUT).
a) Sensors, I/O Devices, I/O Devices w/Ext. Power, and Controller:
– Any 110 interface line shall not have a false pulse> I ps.
– Aft input stimulus shall match the resulting output state In node/controller pairs.
— Stimulus may range from 10 to 100 Hz.
b) Allowable degradation in performance:
– audible signals and/or visible indicators not associated with control I/O
– temporary operating point deviations
– excessive data bus traffic (transmission retries, error frames. etc..)
c) Not allowable degradation in performance;
– change in analogue value > 10 X nominal tolerance
change in digital value
– false I/O data representation in controller
– change of stored data in a device
– system stops operating and requires to be reset
device reset indication
– device self test failure indication
8.3.3.1.2 Performance criteria B
During the tests a temporary loss of the data communication may occur, thereafter the SDS device shall continue to operate as intended.
No change of actual operating state or stored data shall be allowed.
The SDS device shall withstand seventy level 3 (10 V/m) when tested in accordance with EN 61000-43 at a frequency band of 900 MHz 5 MHz, pulse modulated.
Performance cnteria A shall be applied.
8.3.3.4 Conducted radio-frequency disturbance immunity
The SOS device shall withstand a voltage of 10 Vrms when tested in accordance with EN 610004-6 at a frequency band of 150 kHz to 80 MHz, amplitude modulated.
Performance criteria A shall be applied.
8.3.3.5 Fast translenVburst Immunity
The SDS device shall be capable of withstanding 5/50 TrIm ns transients at a 5 kHz repetition frequency when tested in accordance with EN 610004-4. modified as detailed in 9.7.2, at the following voltage levels.
a) Ports for signal lines and data buses not invo’ved in process control shall withstand a level of 1 kV (peak).
b) Ports for process, measurements and control lines, and long bus and control lines shall withstand a level of 2 kV (peak).
c) Ports for DC input and output power shall withstand a level of 2 kV (peak).
d) Ports for AC input and output power shall withstand a level of 2 kV (peak). Performance criteria B shall be applied.
8.3.3.6 Surge immunity
NOTE For target and 110 devices it is not necessary to test for surge immunity. The operating environment of these devices is considered to be well protected against surge voltages caused by lightning strikes.
The SDS device shall be capable of withstanding a 1.2150 (8120) Tr!Th as surge when tested in accordance with EN 61000-4-5 at the following voltage levels.
a) Ports for process, measurement and control lines shall withstand levels of 2 kV for common mode and 1 kV for differential mode.
b) DC input and output power ports shall withstand levels of 0.5 kV for common mode and 0.5 kV for differential mode.
C) AC input and output ports shall withstand levels of 4.0 kV for common mode and 2.0 kV for differential mode.EN 50325-3-2001 pdf download.