Siemens Simatic ET 200S Operating Instructions Manual page 60

Assembling
4.1 Basic principles of installation
Installation rules
• The ET 200S distributed I/O system starts
• A power module comes after the interface module or at the beginning of each voltage
• After a power module come digital, analog, technological, or RESERVE modules.
• After a COMPACT module, digital, analog, technological, or RESERVE modules may
• The ET 200S distributed I/O system ends with the terminating module.
• The maximum configuration of the distributed I/O system is as follows:
Installation position
Preferably, the ET 200S is mounted horizontally on a vertical wall. All other positions are
possible, although there are certain restrictions regarding the ambient temperature.
DIN rail
The distributed I/O system ET 200S is installed on a galvanized DIN rail according to
EN 50022 (35 x 7.5 mm or 35 x 15 mm).
Note
If the ET 200S distributed IO device is exposed to increased vibrations and shock, we
recommend that you screw the DIN rail to the mounting surface at intervals of 200 mm.
To prevent the ET 200S distributed I/O system from slipping sideways, we recommend that
you apply a mechanical hold-down (e. g. with grounding terminal, 8WA2 011-1PH20) at both
ends of the device.
If you install the rail on grounded, zinc-plated mounting plates, there is no need to ground
the rail separately.
Minimum clearances for installation, wiring, and ventilation
When installing the ET 200S in a housing, ensure that the distance to the lid of the housing
or the front door is at least 1 mm.
4-2
– with an interface module or
– with a TM-C terminal module with COMPACT module.
group.
follow. If necessary, power modules may also be deployed.
– IM151-1 BASIC: max. 13 modules (including interface module). The length of the bus
is not relevant.
– IM151-1 COMPACT: max. 13 modules (including COMPACT module). The length of
the bus is not relevant.
– IM151-1 STANDARD / IM151-1 FO STANDARD / IM151-1 HIGH FEATURE / IM151-
3 PN / IM151-3 PN HIGH FEATURE:
Max. 64 modules (including interface module) or max 2 m bus length.
Operating Instructions, 12/2005, A5E00515771-03
ET 200S