Expansion Blocks Description

Introduction

There are two main types of TM7 expansion blocks:

• TM7 Power Distribution Block (PDB)

• TM7 I/O block

Both the TM7 Power Distribution Blocks and TM7 System I/O blocks use two power buses and a data bus to perform their functions. These buses are organized as follows:

• TM7 bus: this bus includes one data bus and one power bus, named as follows:

  • TM7 power bus: distributes power to supply the electronics of the TM7 System I/O blocks. This bus receives its power from a TM5SBET7 Transmitter module. If necessary, the power on the TM7 power bus can be reinforced by adding a TM7 PDB.

  • TM7 data bus: passes data between the Sercos III Bus Interface and the TM7 expansion blocks.

• 24 Vdc I/O power segment: distributes power to the inputs, outputs and the connected sensors and actuators of the TM7 System I/O blocks. Each TM5 / TM7 System can have multiple 24 Vdc I/O power segments, depending on considerations such as power consumption and separation of I/O types.

Ordering Information

Each I/O block reference is distinguished by its type and number of I/O and its physical size. TM7 System I/O blocks come in two sizes, designated as size (1 or 2).

TM7 cables have to be ordered separately.

I/O Block Main Features

The following figure represents the main features of the I/O blocks:

Size 1	Size 2
(A) TM7 bus IN connector (B) TM7 bus OUT connector (C) 24 Vdc power IN connector (D) 24 Vdc power OUT connector (1) Input / Output connectors (depending on references) (2) Status LEDs