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Connections
Interface to transmission line
Electrical specification
Circuit classification
Plug type
Galvanic isolation
Overvoltage protection
Electrical fast transient / Burst, IEC 61000-4-4
Surge 1.2/50 µs, IEC 61000-4-5
Surge 10/700 µs, IEC 61000-4-5
Conducted disturbances, induced by radio-fre-
quency fields, IEC 61000-4-6
Conducted, common mode disturbances
in the frequency range 0 Hz to 150 kHz,
IEC 61000-4-16
Conducted emissions - symmetrical network
ports (0.15 MHz to 30 MHz), CISPR 16-2-1/ EN
55016-2-1
4.5.4
Alarm Relay
The EDS500 devices are equipped with a potential free alarm output (relay with isolated switchover
contact). This output corresponds to a device alarm and is activated when the device loses the
power supply or the alarm LED is constantly on (see Chapter 4.6, "Display Elements"). The reason
for the signaling of an alarm can be referenced in the system alarm table.
Alarm output
Type of switch
Switching voltage
Switching current
Plug type
Circuit classification
Galvanic isolation
Overvoltage protection
Pin allocation alarm output
1
2
3
The relay is designed for switching only safety extra low voltages.
24
Pin
Signal
4
1 & 2
Normal state
1 & 3
Alarm state
4
Common contact (connected to 1)
derived from ITU-T
ES2 (acc. IEC 62368-1)
Phoenix Contact MSTBT 2,5/4-ST
3 kV isolation voltage
line to earth ±4 kV, line to line ±2 kV
4 kV (level 4), criterion A
4 kV line to earth, 2 kV line to line (level 4), crite-
rion B
2 kV line to earth, 1 kV line to line (level 3), crite-
rion B
10 V (level 3), criterion A
30 V continuous disturbance/ 300 V short dura-
tion disturbance (level 4), criterion A
EN 55022/ CISPR 22 class B
toggle (potential free)
60 VDC / 25 VAC
500 mA
Phoenix Contact MSTBT 2.5/4-ST (item no.
1779851)
ES1 (acc. IEC 62368-1)
1.5 kV isolation voltage
line to earth ±4 kV, line to line ±2 kV
WARNING
Device description
1KGT151042 V001 1
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