Field I/O module with 4 inputs and 4 outputs
The Siemens 3RK1400-1DQ00-0AA3 is a K60 compact digital I/O module for distributed field mounting, providing 4 PNP inputs and 4 PNP outputs in an IP67-rated housing. It requires a 20 to 30 V DC sensor supply on the input side and a separate 20 to 30 V DC auxiliary power supply (AUX POWER) for the output circuits, which must comply with VDE 0106 (PELV), protection class III.
I/O mapping and M12 socket layout
The module has 8 M12 sockets: sockets 1–4 handle the 4 inputs (IN1–IN4) and sockets 5–8 handle the 4 outputs (OUT1–OUT4), with each socket carrying two signal channels on PIN 4 and PIN 2. PIN 1 of each M12 socket is sensor supply L+, PIN 3 is sensor supply L-, and PIN 5 is the ground terminal connected to the mounting plate via a grounding wrist strap pin.
Mounting and environmental ratings
Rated IP67 for washdown environments, it operates from -25 to +85 °C and withstands 15 g shock for 11 ms.
