Specifications

AS-Interface

Slaves

I/O modules for operation in the field

Digital I/O modules IP67 - K20

2/36

Siemens LV 1 · 2007

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Overview

The K20 compact module range rounds off the AS-Interface

compact modules with a particularly slim design and a width of

a mere 20 mm. Thanks to its extremely compact dimensions,

these modules are particularly suited for handling machine ap-

plications in the field of production engineering where modules

need to be arranged in the smallest of spaces.

Robotics is yet another application area. Instead of the AS-Inter-

face flat cable, the K20 modules are connected to AS-Interface

over a round cable with M12 cable box. The AS-Interface bus

cable and the 24 V DC auxiliary power supply are routed in this

case in a shared round cable. This enables extremely compact

installation.

The flexibility of the round cable means that it can also be used

on moving machine parts without any problems. The K20 mod-

ules are also ideal for such applications as their non-encapsu-

lated design makes them particularly light in weight.

In applications with tow chains, many users rely on placing the

AS-Interface bus cable in a round cable. In this case, the K20

modules support direct connection to the round cable. No flat to

round cable adapter is required.

The K20 compact module range includes standard AS-Interface

modules, as well as an ASIsafe version for the connection of fail-

safe sensors, such as EMERGENCY-STOP pushbuttons or pro-

tective door monitoring. All standard AS-Interface K20 modules

support, as far as technically possible, the expanded address

mode (A/B addresses) according to AS-Interface Specification

2.1, which enables connection of 62 stations to an AS-Interface

network. The K20 module with four inputs and four outputs works

in expanded address mode according to AS-Interface Specifi-

cation 3.0 which, for the first time, supports four outputs with an

A/B slave, thus enabling 248 inputs and 248 outputs in a fully ex-

panded AS-Interface network.

For particularly space-saving dimensions, the sensors and actu-

ators are connected over M8 plug-in connectors. Alternatively,

M12 connectors with Y assignment can be used.