Endress+Hauser Tankvision NXA820 - Page 14

Wiring
14
Wiring of DC Variants
To meet the emission class A
1)
, it is mandatory to install the enclosed ferrite as close as possible to
the power supply connector of the device. If this is not possible an additional line filter can be
installed.
L00-NXA82xxx-04-00-00-xx-001
A: Terminal clamp B: Ferrite C: Fixation (e.g. cable straps)
The delivered ferrite must be installed as follows:
1. Put over the cable (prior installing the core cable ends)
2. The ferrite must be installed and secured against slipage next to the terminal clamp (e.g. with
2 cable straps)
4.2.2 Status Relay
Connector: Phoenix FKC 2,5HC/3-St-5,08
!
Note!
The depicted switching state of the relay refers to the de-energized state.
4.2.3 LAN connection
1) DIN EN 55011: Industrial, scientific and medical (ISM) radio-frequenzy equipment - radio disturbance characteristics - limits and methods of measurements
23
1
6
7
8
W &M
W &M
RESET
RESET
RESET
NXA Status
Relay
NXA Status
Relay
E
L+
L-
6
7
8
3
2
1
Fuse
Fuse
POWER
10,5 ... 32V DC
2AT
2AT
10 11 12 13
10
10 11 12 13
MODBUS
MODBUS
A
B
C
Terminal Meaning Remarks
6 normally open contact
• NXA operating normally:
terminals 7 & 8 are interconnected
• NXA powered off or fault status condition:
terminals 6 & 8 are interconnected
7 normally closed contact
8 switching contact
Socket Meaning Remarks
System LAN port Connects the instrument to the network.
Sync Link LAN port
(in preparation)
Used for connection to redundant unit.
If the primary unit fails, its task is taken over by the redundant unit.
Service LAN port Connects the instrument to a computer locally for service purpose.
Only this instrument can be configured. The Service LAN port does not
allow access to the network.