Siemens SM 1221 Series Digital Output Module for Use with S7-300 Series, Digital, 230 V

To achieve rapid data transfer between your control system and sensors, opt for this digital output module from Siemens. It's compatible with PLCs from the S7-300 range and converts the binary operating signal from the controller to a suitable format for the external component. As it has 16 digital outputs, there's enough room to connect multiple devices. With a permissible load voltage range of 79 to 264V AC, it's a versatile option that's not fussy about power supply. You'll find it ideal for contactors, motor starters or solenoid valves in your energy management system and water treatment facilities.

• Optocoupler between the channels and backplane bus reduces the risk of damage caused by electrical hazards
• Mountable in a vertical or horizontal position for flexible assembly
• Maximum response time of 300ms means you get rapid signal transmission

It has a diagnostic function for convenient monitoring. The LED indicator is designed to come on when a fuse is blown.

Siemens S7-300 Digital and Analogue I/O Modules

Expansion modules and accessories to support the Siemens S7-300 PLC range. Each S7-313 PLC CPU Base Unit may be expanded with up to 8 expansion modules. S7-314 CPU Base Units can accept a total of 4 expansion racks consisting of 8 expansion modules each.,All expansion modules share the following features:

Compact design
LED’s input signal status indication
Front panel connector for actuators or sensors. Connectors can be coded according to application, thus preventing the connection of an incorrect unit
No slot rules: the address of the input corresponds to the slot number
Modules may be configured and the parameters set using STEP 7 Lite software
Data is stored centrally. When a module is removed/replaced data is automatically sent to the new module, removing possible set up errors