Terminal block, type K0 light

Terminal block, type H1 dark

Terminal block, type M1 light

The slots for the I/O modules are created by connecting carrier modules and terminal blocks. The terminal blocks contain the process terminals for connecting sensors, actuators and other devices.

Select the terminal block for the slot of an I/O module based on the following dependencies:

• Definition of I/O modules associated with a potential group
• Requirement for configuring redundant I/O modules
• Parameters of the I/O module required (number of process terminals, temperature detection)

The following table contains selection criteria for the terminal blocks available:

¹⁾ The 45 mm wide terminal blocks are to be used exclusively for operating the I/O modules in I/O redundancy or slot covers. The process terminals run in parallel to the contacts of the two I/O modules.

Potential groups/color type of the terminal blocks

To help you distinguish between potential groups on an ET 200SP HA station, they come in both a light and a dark version:

• Each light-colored terminal block that is fitted in the station starts a new potential group. The first terminal block fitted (on the first carrier module immediately to the right of the interface module) is therefore light-colored.
• Each dark-colored terminal block passes the supply voltage connected at the light-colored terminal block to the I/O modules and to the dark terminal block positioned to the right of it.