AT6402
Module with six temperature inputs for thermocouples (e.g. flue gas temperature sensor, combustion
chamber sensor).
LED
Colour
Status
Description
r
Green
Off
Not in operation (no power supply)
Quick flashes
Reset mode
Flashing
Preoperative mode
On
Module in operation
e
Red
Off
No error / no supply to module
On
Error or reset status
Single Flash
Warning/error of an I/O channel. Overflow or
underflow of analogue inputs
e+r
Red illuminated (e) / Green flashing (r)
Incorrect firmware
1-6
Green
Off
The input is switched off
Flashing
Overflow/underflow or broken cable of input signal
On
Value is OK
Electric components and wiring
7
PLC
Service manual SPS 4000 | B0960622_en
127