I/O module for Siemens 3RK series AS-i SlimLine Compact control cabinet

I/O module for Siemens 3RK series AS-i SlimLine Compact control cabinet

Basic Overview

Applicable products: Siemens 3RK series AS-i SlimLine Compact module

Installation environment: inside the control cabinet, IP20 protection level

Core advantages: ultra narrow width (17.5mm/22.5mm), easy wiring, high compatibility, strong diagnosis

Module classification and specification

Type Typical Model Width Core Features

Digital quantity modules 3RK2200, 3RK2400 17.5/22.5mm 4DI/4DQ, PNP output 2A/channel, relay output

ASIsafe safety module 3RK1205, 3RK1405 17.5mm 2-channel safety input SIL 3 / PL e / Cat.4

Analog modules 3RK1207, 3RK1107 22.5mm 4AI/2AQ, current/voltage/thermistor switching, 15 bit resolution

Core functional characteristics

wiring method

Screw terminal: torque 0.6~0.8Nm

Push in: quick connect without screwdriver, wire diameter 0.5~1.5mm ²

Power supply selection

Sensor power supply: AS-i bus or Uaux 24V DC dip switch

Uaux power supply: maximum 500mA, AS-i power supply: maximum 200mA

Equipment connector

Model: 3RK1901-1YA00/1YA10

Implement AS-i bus and Uaux cascaded wiring, only need to connect the first module

Transmission capacity: AS-i2A, Uaux6A, requiring 6A C-type circuit breaker

Address setting

Address range: Standard slave stations 1~31, A/B slave stations 1A~31B

Addressing method: front ADDR socket, addressing device writing

Factory address: 0 (requires modification before use)

Installation specifications

Installation method

DIN rail installation: 35mm standard rail, snap in fixing

Wall installation: equipped with fixing ears, M4 screws, torque 1Nm

safety requirements

Power must be cut off before operation

Anti static protection to prevent conductive pollution

Wiring and Protection

terminal definition

AS-i+, AS-i -: bus interface

L+, M: Uaux 24V DC auxiliary power supply

DIx: Digital input; DQx: Digital output; AIx/AQx: Analog quantities

protection function

Reverse polarity protection: both AS-i and Uaux have it

Short circuit/overload protection: sensors and output channels

Equipotential connection: Analog applications need to ensure common ground and voltage difference * * ≤± 50V**

Details of various types of modules

Digital I

Input: PNP Type 2, low level * * ≤ 1.5mA**

Output: Semiconductor 2A/channel, relay contact output

Diagnosis: Input yellow LED, output yellow/red LED, AS-i/AULT dual color LED

ASIsafe safety module

Safety level: SIL 3, PL e, Category 4

Input: Safety emergency stop/door contact, dual channel

Output: Standard PNP, switchable power supply AS-i/AUX

Analog module

Input: 4 channels, supporting * * ± 10V/4-20mA/Pt100/Ni100/0-600 Ω**

Output: 2 channels, supporting * * ± 10V/0-20mA/4-20mA**

Resolution: 15 bits+symbol, filtering 50/60Hz optional

Refresh time: ≤ 111ms (2 channels)

Watchdog: If there is no data for 50ms, the FAILT will turn red and the output will return to zero

Diagnosis and status indication

Meaning of LED status

AS-i/AULT evergreen communication is normal

Constant red, no communication/address error

Red flashing sensor power supply overload

Green and red flashing output overload

AUX POWER Evergreen Uaux 24V Normal

No auxiliary power supply/reversed connection

Accessories List

Device connector: 3RK1901 series

Terminal: Screw/Push Pull 2/4-pole

Wall fixing components: 3ZY1311-0AA00

Identification labels, specialized screwdrivers

Key issues

Question 1: What are the two ways to supply power to the sensors of the digital module? What are the maximum currents for the two methods?

Answer: AS-i bus power supply or Uaux 24V DC auxiliary power supply can be selected through the dip switch; AS-i provides a maximum power of 200mA (total of all channels), while Uaux provides a maximum power of 500mA (total of all channels).

Question 2: What safety level has the ASIsafe safety module reached? What devices are mainly used for access?

Answer: Achieve the highest levels of SIL 3, PL e, and Category 4; Mainly connected to mechanical contact safety devices such as emergency stop buttons, safety doors, and safety gratings.

Question 3: How to switch measurement types for analog modules? How to handle unused channels to optimize performance?

Answer: Use the front DIP switch to switch voltage/current/thermistor modes uniformly; Unused channels can be turned off by DIP switches, reducing the number of activated channels, shortening analog transmission time, and improving bus efficiency.