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System Overview SIMATIC 545/555/575 System Manual

1.4 Hardware Overview

The base that contains a 545, 555, or 575 CPU and I/O modules is called the

local base. Expansion I/O is also available, in the form of Series 505 remote

I/O and/or PROFIBUS-DP I/O slaves and field devices. Special function (SF)

I/O modules can be used in a Series 505 remote base; however, performance

is improved when they are used in the local base. SF I/O cannot be used

with the 505 PROFIBUS-DP RBC (PPX:505–6870) on the PROFIBUS-DP

channel. See Table B-3 in Appendix B.

545 and 555 CPUs are housed in a Series 505 base, which has slots for a

power supply, a CPU or RBC, and I/O modules. A local base can contain a

mix of Series 505 I/O (normal and/or immediate), interrupt I/O (normal

and/or immediate), and SF I/O (normal only). Four base models are

currently available:

• Model PPX:505–6504, 4 I/O slots.

• Model PPX:505–6508, 8 I/O slots.

• Model PPX:505–6511, 11 I/O slots, supports redundant power supply,

redundant RBCs, and/or dual media (cabling).

• Model PPX:505–6516, 16 I/O slots.

Any Series 505 base may be used at any place in the system, as either local

or remote. Select your base according to the number of I/O points required

(including plans for future expansion). Chapter 3 describes installation

procedure for Series 505 system hardware, and Chapter 5 is devoted to

information about Series 505 RBCs, including the DP RBC, which is housed

in a Series 505 base.

The 575 CPUs are housed in a VMEbus base with slots for a power supply,

one or more CPUs, VME I/O, and third-party masters and slaves. The

PPX:575–2130 VMEbus base has slots for 14 0.8-inch boards in addition to

the power supply and system controller. Chapter 4 describes installation

procedures for the 575 local base.

Series 505 Bases

VME Base

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Siemens SIMATIC TI500 Especificaciones Pagina 34