Alarm Relay (X4) - ABB HITACHI EDS500 Series Manual

Connections
Pin allocation transmission line interface (X3)
1 2 3
4.5.4

Alarm relay (X4)

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 looses 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 (X4)
Type of switch
Switching voltage
Switching current
Plug type
Circuit classification
Overvoltage protection
Electrical fast transient / Burst, IEC 61000-4-4 4 kV (level 4), criterion A
Surge 1.2/50 µs, IEC 61000-4-5
Conducted disturbances, induced by radio-
frequency fields, IEC 61000-4-6
Conducted, common mode disturbances
in the frequency range 0 Hz to 150 kHz,
IEC 61000-4-16
Pin allocation alarm output (X4)
1 2 3
The relay is designed for switching only safety extra low voltages.
26
Pin Signal
1 NF1a
2 NF1b
3 NF2a
4 NF2b
4
Pin Signal
4
1 & 2 Normal state
1 & 3 Alarm state
4 Common contact (connected to 1)
toggle (potential free)
60 VDC / 25 VAC
500 mA
Phoenix Contact MSTBT 2,5/4-ST
line to earth ±4 kV, line to line ±2 kV
4 kV line to earth, 2 kV line to line (level 4), cri-
terion B
10 V (level 3), criterion A
30 V continuous disturbance/ 300 V short
duration disturbance (level 4), criterion A
W A R N I N G
Device description
1KGT151042 V000 1