AT4222
Module with four temperature inputs for the measurement of PT100 and PT1000 sensors (e.g. boiler
temperature sensor, store 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
1-4
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
129