Electromagnetic Compatibility

Immunity
Against electrostatic discharge (ESD)	According to EN 61000-4-2, zone B, criterion B
Electrostatic voltage in case of air discharge	8 kV
Electrostatic voltage in case of contact discharge	4 kV, in a closed switch-gear cabinet 6 kV 1)
ESD with communication connectors	In order to prevent operating malfunctions, it is recommended, that the operating personnel discharge themselves prior to touching communication connectors or perform other suitable measures to reduce effects of electrostatic discharges.
ESD with connectors of Terminal Bases	The connectors between the Terminal Bases and CPUs or Communication Modules must not be touched during operation. The same is valid for the I/O-Bus with all modules involved.
Immunity
Against the influence of radiated (CW radiated)	According to EN 61000-4-3, zone B, criterion A
Test field strength	10 V/m
Immunity
Against transient interference voltages (burst)	According to EN 61000-4-4, zone B, criterion B
Supply voltage units (AC, DC)	2 kV
Digital inputs/outputs (24 V DC)	2 kV
Digital inputs/outputs (120/230 V AC)	2 kV
Analog inputs/outputs	1 kV
CS31 system bus	2 kV
Serial RS-485 interfaces (COM)	2 kV
Serial RS-232 interfaces (COM, not for PM55x and PM56x)	1 kV
ARCNET	1 kV
FBP	1 kV
Ethernet	1 kV
I/O supply, DC-out	1 kV
Immunity
Against the influence of line-conducted interferences (CW conducted)	According to EN 61000-4-6, zone B, criterion A
Test voltage	3V zone B, 10 V is also met.
High energy surges	According to EN 61000-4-5, zone B, criterion B
Power supply AC	2 kV CM* / 1 kV DM*
Power supply DC	1 kV CM* / 0.5 kV DM*
DC I/O supply, add. DC-supply-out	0.5 kV CM* / 0.5 kV DM*
Buses, shielded	1 kV CM*
AC-I/O unshielded	2 kV CM* / 1 kV DM*
I/O analog, I/O DC unshielded	1 kV CM* / 0.5 kV DM*
	* CM = Common Mode, * DM = Differential Mode
Radiation (radio disturbance)	According to EN 55011, group 1, class A

¹) High requirement for shipping classes are achieved with additional specific measures (see specific documentation).