Siemens Simatic S7 Series System Manual

Communication
8.6 RS485
S7-200 SMART
404 System Manual, 09/2015, A5E03822230-AC
Both connectors have two sets of terminal screws to allow you to attach the incoming and
outgoing network cables. Both connectors also have switches to bias and terminate the
network selectively. The following shows typical biasing and termination for the cable
connectors.
Table 8- 19 Biasing and termination for cable connectors
Cable must be terminated and biased at both ends. Bare shielding: Approximately 12 mm (1/2 in)
must contact the metal guides of all locations.
①
Switch position = On: Terminated and biased
②
Switch position = Off: No termination or bias
③ Switch position = On: Terminated and biased
Table 8- 20 Termination and bias switch positions
Switch position = On: Termination and biased
Switch position = Off: No termination or bias
①
Pin number
②
Network connector
③ Cable shield

Siemens Simatic S7 Series Specifications

General

CPU	Varies by model (e.g., S7-300, S7-400, S7-1200, S7-1500)
Communication Interfaces	PROFIBUS, PROFINET, Ethernet, MPI
Programming	TIA Portal, STEP 7
Programming Languages	LAD, FBD, STL, SCL, GRAPH
I/O Modules	Digital, Analog, Specialty modules available
Operating Temperature	0°C to 60°C (standard models)
Mounting	DIN rail mounting
Operating Voltage	24V DC or 120/230V AC (varies by model)
Protection Class	IP20 (standard models)
Memory	Varies depending on the S7 model. Includes work memory (RAM) for program execution, load memory (EEPROM or Flash) for program storage, and system memory for operating system functions. Memory sizes range from kilobytes to megabytes.