Redundancy Link Interface - ABB Ability 800xA Series User Manual

2 Hardware Installation
2.4 Mounting and Dismounting
Table 2.7: ETH 1 Pin Assignment
(Continued)
Pin
7
8
2.4.5

Redundancy Link Interface

When using two LD 810HSE Ex Linking Devices as a redundant set, the redundancy
link interfaces (RDL) of both Linking Devices (primary and secondary) must be connected
by a cable, thus forming a "redundancy link". If the redundancy link is not installed during
start-up (power-on), the LD 810HSE Ex will operate in non-redundant mode.
The interface is not galvanically isolated. Thus, make sure that there is no potential
difference between the two connected devices.
The maximum cable length is 0,5 m according to EMC requirements. The pin assignment
is as follows:
Table 2.8: Redundancy Link Connections
Redundancy
Link
The receive (RX) and transmit (TX) signals must be crosslinked.
2PAA114135-610
Signal
Not used
Not used
Pin Signal
4 GND
5 TX
6 RX
Description
Drain wire
Drain wire
Description
Ground
Transmits data to the redundant device.
Receives data from the redundant device.
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