Siemens SIWAREX WP321 Manual

Connection
6.4 Connection of RS485 serial interface
SIWAREX WP321
Manual, 07/2014, A5E33715669A-02
29
6.4
Connection of RS485 serial interface
The following devices can be connected to the serial interface:
● Siebert display type S102 (connections: see chapter Connection of Siebert display via
RS485 (Page 30))
● PC with RS485/USB converter (see accessories) for use of SIWATOOL
Table 6- 2 Termination of RS485 serial interface
Labeling
Function
Connection pin
RS485: T+ RS485 termination +:
Is used at the physical end of the bus for inserting ter-
mination jumpers
9
RS485: T- RS485 termination -:
Is used at the physical end of the bus for inserting ter-
mination jumpers
10
RS485: D+' RS485 data line +':
Is used at the physical end of the bus for inserting ter-
mination jumpers and in between for looping through the
bus cables
11
RS485: D-' RS485 data line -':
Is used at the physical end of the bus for inserting ter-
mination jumpers and in between for looping through the
bus cables
12
RS485: D+ RS485 data cable + 13
RS485: D- RS485 data cable - 14
If a SIWAREX WP321 module is connected to SIWATOOL or a Siebert display, insert wire
jumpers between the T+ and D+' terminals and between the T- and D-' terminals.

Siemens SIWAREX WP321 Specifications

General

Brand	Siemens
Model	SIWAREX WP321
Category	Accessories
Language	English