The Siemens 3RK2400-1DQ00-0AA3 is a K60 compact digital I/O module designed for field-mount operation at IP67 — meaning it handles washdown and dust ingress on a machine frame or conveyor line without an enclosure. It provides 4 PNP inputs and 4 outputs, each accessible via standard M12 sockets, with the I/O configuration set to code 7. The module requires an external auxiliary supply of 20 to 30 V DC for the output circuits, which must comply with VDE 0106 (PELV), protection class III. The sensor supply (L+ and L-) is provided on PIN 1 and PIN 3 of each socket, so the module powers proximity sensors or limit switches directly — no separate sensor power supply needed.
Pinout and I/O mapping at a glance
Each of the eight M12 sockets has a fixed assignment: sockets 1-4 handle inputs (IN1 through IN4) and sockets 5-8 handle outputs (OUT1 through OUT4). For example, socket 1 maps PIN 4 to IN1 (D0) and PIN 2 to IN2 (D1); socket 5 maps PIN 4 to OUT1 (D0) and PIN 2 to OUT2 (D1). This pin-per-socket layout means you can trace a sensor or actuator directly to its M12 connector without cross-referencing a terminal diagram. The input circuit is PNP transistor type, with a signal-1 minimum of 6 mA and signal-0 maximum of 1.5 mA. Built-in short-circuit protection and induction suppression are included on the outputs, and a watchdog timer monitors the module's communication health.
Mounting and environmental ratings
The module snaps onto standard DIN rail or mounts to a wall using the K60 mounting plate (sold separately — modules ship without the plate). Dimensions are 60 mm wide, 152 mm high, and 29 mm deep, fitting a compact footprint inside a junction box or on a machine frame. Shock resistance is rated at 15 g for 11 ms. Each M12 socket's PIN 5 connects to the grounding wrist strap in the mounting plate via a dedicated pin, ensuring consistent earth bonding across the module.