Siemens S7-400 User Manual

Networking
5-9
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
Terminating Resistor on the Bus Connector
on
off
on
off
Terminating
resistor
switched on
Terminating
resistor
switched off
Figure 5-3 Terminating resistor on bus connector
Terminating Resistor on the RS 485 Repeater
DC
24
V
L+ M PE M 5.2
A1 B1A1B1
A2B2A2B2
SIEMENS
RS 485-REPEATER
ON
ON
Terminating resistor
for bus segment 1
Terminating resistor
for bus segment 2
Figure 5-4 Terminating resistor on RS 485 repeater

Siemens S7-400 Specifications

General

Product type designation	S7-400
Protection Class	IP20
CPU Type	Various (e.g., CPU 412, CPU 414, CPU 416, CPU 417)
Digital Inputs	Depends on configuration and modules used
Digital Outputs	Depends on configuration and modules used
Analog Inputs	Depends on configuration and modules used
Analog Outputs	Depends on configuration and modules used
Communication Interfaces	MPI, PROFIBUS, PROFINET
Programming Languages	STEP 7 (STL, LAD, FBD, SCL, GRAPH)
Power Supply	24V DC or 120/230V AC (depending on the power supply module).
Operating Temperature	0°C to 60°C
Relative Humidity	5% to 95% (non-condensing)
Redundancy	Supported (with specific CPUs and configurations)
Mounting Type	Rack mounting
Memory	Up to several MB (depends on CPU model)