Operating and Installation Instructions
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Stand: 24.05.2019
5.2.2 Connection of the fail safe relay
In addition to the redundant voltage input, the ETHSW50K has a fault signal relay for signalling a
fault. This ensures trouble-free operation and direct fault detection in the event of a power supply
failure or voltage supply failure. The fault signal relay is designed as a normally open contact.
For proper connection, please follow these steps:
Connect the corresponding signalling system to the connection terminals marked ALM (in the
middle of the 6-pole terminal plug, max. 1 A / 24 VDC).
Activate the fault message contact Power Alarm at PIN 1 of the DIP switch (ON).
+
‐
+
‐
A
L
M
P1
P2
Clamp
ALM
ALM
DIP PIN 1
Signal
Connection to alarm system
Connection to alarm
system
ON
5.2.3 Connecting the network devices
The ETHSW50K has 5 x 10/100 Mbit/s ports with RJ45 connectors. At each port there are 2 LEDs
for signalling the operating mode (see chapter "6. LED status indicators"). Proceed as follows to
ensure proper functioning:
Connect your Ethernet network devices to your Fast Ethernet Switch using a
straight-through (standard patch cable) or cross-over (UTP Unshielded Twisted pair
/STP Shielded Twisted Pair) cable with RJ-45 connectors.
An LED associated with the port lights up after a successful link up depending on the
negotiated data rate.
The LED associated with the port flashes when data transmission is in progress.
2
1