Special Signal modules
5-5
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
5.3 Dummy Module DM 370; (6ES7370-0AA01-0AA0)
Order number
6ES7370-0AA01-0AA0
Characteristics
The dummy module DM 370 reserves a slot for a non-parameterized module. They
can be used as placeholders for:
• Interface modules (without reservation of address space)
• Non-parameterized signal modules (with reservation of address space)
• Modules which occupy 2 slots (with reservation of address space)
When replacing the dummy module with another module from S7-300, the
mechanical assembly and the address assignment/address allocation of the entire
assembly remain unchanged.
Configuration with STEP 7
You must only configure the dummy module DM 370 with STEP 7 if the module of
the slot is to be reserved for a parameterized signal module. If the module is
reserving the slot for an interface module, the configuration cannot be carried out
with STEP 7.
Modules which occupy 2 slots
For modules which occupy 2 slots, you must plug in 2 dummy modules. Only the
dummy module in slot “x” reserves the address space (not the dummy module in
slot “x + 1”; for details of the procedure, see table 5-2).
A maximum of 8 modules may be plugged into a module carrier (SM/FM/CP). If
you, for example, reserve a slot for an 80 mm wide module with 2 dummy
modules, you may still plug in 7 other modules (SM/FM/CP) because the dummy
module only occupies the address space for 1 module.
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