Siemens SIMATICS PCS7 brochure Remote terminal units, Possible tele Information points

© Siemens AG 2011

Remote terminal units

Classification of the remote terminal units

		Possible tele-		Information points/
RTU	Applications	control protocols		buffer size
RTU Small: controller integrated in SIMATIC ET 200S
	RTU with up to approx. 30 I/Os	•	Modbus	No buffering
	For small, cost-sensitive applica-	•	IEC 870-5-101	Up to approx. 200 information
	tions	•	IEC 870-5-104	points
				Buffer size:
				800 information points
RTU Medium: SIMATIC S7-300/S7-300F controller
	RTU with up to approx. 100 I/Os	•	SINAUT ST7	TIM buffering
		•	DNP3	(up to 16 000 frames or up to
	For medium-sized applications;			32 000 frames with TIM 3V-IE
	extremely flexible configuration			Advanced)
	S7-300F for safety-related appli-	•	Modbus	No buffering
	cations	•	IEC 870-5-101	Up to approx. 2 000 informa-
		•	IEC 870-5-104	tion points
				Buffer size: 800 to 3 200 infor-
				mation points
RTU Large: SIMATIC S7-400/S7-400F controller
	RTU with up to approx. 500 I/Os	•	SINAUT ST7	TIM buffering
		•	DNP3	(up to 56 000 frames)
	For larger applications requiring	•	Modbus	No buffering
	increased performance
	S7-400F for safety-related appli-	•	IEC 870-5-101	Up to approx. 5 000 informa-
		•	IEC 870-5-104	tion points
	cations
				Buffer size: 3 200 information
				points
RTU Large: SIMATIC S7-400H/S7-400FH controller
	Like S7-400/S7-400F	•	DNP3	TIM buffering
				(up to 56 000 frames)
		•	IEC 870-5-101	Up to approx. 5 000 informa-
		•	IEC 870-5-104	tion points
				Buffer size: 3 200 information
				points

The remote control units supported by SIMATIC PCS 7 TeleControl have a performance classified as Small, Medium or Large.

Controllers of SIPLUS extreme design are also available in all performance classes, and can be operated under extreme con- ditions, e.g. ambient temperatures from -25 °C to +70 °C, con- densation or exposure to media.

In addition, the SIMATIC S7-300F and S7-400F controllers can be used to implement safety-related applications on site and automatically set the plant to a safe status in the event of a dangerous fault.

SIMATIC PCS 7 TeleControl system components 13