IB IL SGI 2/P-PAC

7647_en_04

PHOENIX CONTACT

13

13

Connection examples

13.1

6-wire connection (a strain gauge load cell per channel) with two indicators

The RS-485 interface has bus capability and can operate several devices. When an address is selected, the current mea-

sured value of channel 1 or channel 2 can be displayed.

Use a twisted-pair, shared and shielded data line to connect the displays. Fit a termination resistor to the data cable at the

most remote point of the RS-485 network. Use the integrated termination resistors of the display for this purpose.

Figure 6

Connection of strain gauges in 6-wire technol-

ogy

R

L

R

L

+Uv1

+U01

Tx+

+Ud1

FE

FE

Ka1

GND

Uv

GND

Tx

GND

Tx

-U01

Tx-

-Ud1

FE

FE

Kb1

TR

CH1

CH2

D

12

COM

Rx+ Rx-ZR

COM

Rx+ Rx-ZR

S102 Address 1

S302 Address 2

Key:

R

Cable resistance

Address 1:

Displays the measured value of chan-

nel 1

Address 2:

Displays the measured value of chan-

nel 2

The RS-485 interface transmits a special

weighing protocol.