Contact assignment and LED description

WARNING

Risk of injury through electric shock and damage to the device!

Bring the Bus Terminal system into a safe, voltage-free state before starting mounting, disassembly or wiring of the Bus Terminals!

Contact assignment and LED description 1:
KL3351 - Contact assignment and LED description

Contact assignment

Terminal point

No.

Comment

+UD

1

+ input measuring voltage

-UD

2

- input measuring voltage

-UV

3

0 V (supply voltage)

Shield

4

Shield

+Uref

5

+ input reference voltage

-Utef

6

- input reference voltage

+UV

7

+5 V (supply voltage)

Shield

8

Shield

LED description

LED

Color

Description

Run LED1
Run LED2

green

On: Normal operation

Off: Watchdog timer overflow has occurred. If no process data is transmitted to the Bus Coupler for 100 ms, the green LEDs go out

Error LED1

red

outside the range for the signal voltage (UD) or

wire breakage

Error LED2

red

outside the acceptable range for the reference voltage (Uref)