Siemens Simulator Module for Use with SIMATIC S7-300 Modular Controller

SIMATIC S7-300 Dummy module DM 370 suitable for use with a module exchange.
SIMATIC S7-300 Simulator Module SM 374, for simulating 16 inputs or 16 outputs respectively 8 inputs and 8 outputs; 16 switches and 16 LEDs.

S7-300 Software, Accessory Modules and Accessories