Fitting The Short At Card - Siemens S7-400 Installation Manual

8.4.5

Fitting the Short AT Card

Installing the AT Card
A short AT card can be used with the AT adapter module ATM 478. Only short
AT cards with a slot in the mounting bracket can be fitted (see also the chapter on
M7-400 expansion in the Reference Manual).
To assemble an AT card in an AT adapter module ATM 478, proceed as follows:
Warning
!
The modules can be damaged.
When inserting or removing the AT card with power applied and without observing
the ESD guidelines, the CPU, AT adapter modules and AT card can be damaged.
Never insert or remove the AT card with power applied. Always switch off the
power supply before inserting or removing the AT card. Observe the
ESD guidelines.
1. If the ATM 478 AT adapter module is installed in the rack, you must remove the
module assembly and remove the ATM 478 AT adapter module from this
assembly.
2. Remove the cover from the upper left side of the ATM 478 (see Figure 8-4).
3. Remove the mounting bracket for the AT module from the upper front of the
ATM 478 (see Figure 8-4).
4. Insert the AT card into the slot from the front (see Figure 8-4).
5. Press the AT card through the side opening and at the front downward into the
ISA bus connector until it engages. Ensure that the support plate of the AT card
slides under the metal spring on the front of the ATM 478 (see Figure 8-4).
6. Fit the mounting bracket over the angled part of the support plate of the AT card
and screw it onto the support plate of the AT card and to the ATM 478.
7. Fit the cover on the upper left side of the ATM 478.
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
Assembling the M7-400
8-15