Siemens SIWAREX WP251 User Manual

Connection
6.7 Connection of the analog output (1 x AQ)
SIWAREX WP251
36 Manual, 12/2015, A5E37203357A
6.7
Connection of the analog output (1 x AQ)
CAUTION
Unknown assignment of the analog outputs
The assignment of the analog output is not known at the time of connection. The analog
output can be active immediately after turning on the power supply. This may damage parts
of the system.
Do not create a connection with the analog output before you know the assignment.
The analog output is not permanently assigned to a process value in the delivery state. The
assignment of the analog output to a process value and its response to errors is carried out
during commissioning in data record 7. If a wire break occurs, the LED labeled "AQ" flashes
red. The output can be assigned as a 0-20 mA or 4-20 mA output.
Table 6- 5 Connection of analog output
Labeling
Function
AQ+
Analog output +
AQ- Analog output -
6.8
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 37))
● Operator Panels or other HMI devices with RS485 and Modbus protocol RTU
● Communication partner with Modbus protocol RTU
Table 6- 6 Connection of RS485 serial interface
Labeling
Function
EIA-485 T+
RS485 termination +
EIA-485 T-
RS485 termination -
EIA-485 D+‘
RS485 data line +‘ for looping through of bus signal
EIA-485 D-‘ RS485 data line -‘ for looping through of bus signal
EIA-485 D+
RS485 data line + for feeding in of bus signal
EIA-485 D-
RS485 data line - for feeding in of bus signal
If a SIWAREX WP251 module forms the termination of an RS485 network, insert a wire
jumper between the D+‘ and T+ terminals and between the D-‘ and T- terminals for
termination of the bus network.

Siemens SIWAREX WP251 Specifications

General

Brand	Siemens
Model	SIWAREX WP251
Category	Accessories
Language	English