Endress+Hauser Tankvision NXA820 - 4.4 Host;Printer Connection Terminal Assignment; 4.4.1 Host Connection: RS232

Wiring
18
4.4 Terminal assignment host/printer connection -
Host Link NXA822 / Data Concentrator NXA821
This chapter is valid for Tankvision Host Link and Tankvision Data Concentrator with Printer Port
option.
L00-NXA82xxx-04-00-00-xx-005
A: Power supply B: Fuse C: Status relay D: System LAN port E: Sync Link LAN port F: Service LAN port
G: RS232 Host connection (Host Link or Printer Connection Data Concentrator H: RS485 Host connection I:
Endress+Hauser CDI port J: Display port K: USB port L: Weights & Measures locking switch
4.4.1 Host connection: Modbus Serial, EIA/TIA-232 (RS232)
The NXA822 Host Link is defined as a Data Terminal Equipment (DTE) device, and provides EIA/
TIA-232 (RS232) interface through a male DB9 connector whose pin out complies with the EIA/
TIA-574 standard:
2 3
1
6
7
8
W &M
W &M
RESET
RESET
RESET
RESET
NXA Status
Relay
NXA Status
Relay
E
L+
L+
L-
6
7
8
3
2
1
Fuse
Fuse
POWER
POWER
10,5 ... 32V DC
10,5 ... 32V DC
2AT
2AT
DTR
DSR C
TS
RTS
RS485
RS232
C
B
A
18
17
16
A
B
C
D E
F
G
H
I
J
K
L
Pin RS232 Name Remarks
1 CD Carrier Detect Signal from connected device
2 RxD Receive Data Signal from connected device
3 TxD Transmit Data Signal to connected device
4 DTR Data Terminal Ready Signal to connected device
5 G Signal Ground Common connection
6 DSR Data Set Ready Signal from connected device
7 RTS Request To Send Signal to connected device
8 CTS Clear To Send Signal from connected device
9 RI Ring Indicator Signal from connected device
Case Shield Shield