RTAC Family Comparison Table

	SEL-3505 RTAC	SEL-3505-3 RTAC	SEL-2240 Axion With SEL-2241 RTAC Module	SEL-3530-4 RTAC	SEL-3530 RTAC 1U/3U	SEL-3350 With RTAC Configuration	SEL-3555 RTAC	SEL-3560S RTAC	SEL-3560E RTAC
Starting Price	$868 USD	$1,200 USD	$3,102 USD	$3,090 USD	$4,870 USD	$5,937 USD	$7,910 USD	$7,597 USD	$8,633 USD
Processor	333 MHz	333 MHz	533 MHz	533 MHz	533 MHz	1.6 GHz Atom quad-core	2.0 GHz Xeon quad-core	2.0 GHz Xeon quad-core	2.0 GHz Xeon quad-core
RAM	512 MB	512 MB	1 GB	1 GB	1 GB	8 GB	8 to 16 GB	8 to 16 GB	8 to 16 GB
Storage	2 GB	2 GB	2 GB	2 GB	2 GB	30 to 480 GB	30 to 480 GB	30 to 480 GB	30 to 480 GB
Operation Temperature Range	–40° to +85°C	–40° to +85°C	–40° to +85°C	–40° to +85°C	–40° to +85°C	–40° to +85°C	–40° to +75°C	–40° to +75°C	–40° to +60°C
Graphical Web-Based HMI	None	None	Viewing and control via web browser	Viewing and control via web browser	Viewing and control via web browser	Viewing and control via web Browser; integrated video; 1 DisplayPort	Viewing and control via web browser; integrated video; 1 DisplayPort; 1 DVI/VGA port; 2 DVI-D ports	Viewing and control via web browser; integrated video; 1 DisplayPort; 1 DVI/VGA port; 2 DVI-D ports	Viewing and control via web browser; integrated video; 1 DisplayPort; 1 DVI/VGA port; 2 DVI-D ports
Power Supply	Single: 12/24 Vdc or 24/48 Vdc	Single: 12/24 Vdc or 24/48 Vdc	Redundant: 120/240 Vac, 125/250 Vdc; and/or 24/48 Vdc	Single: 120/240 Vac, 125/250 Vdc; 48/125 Vdc, 120 Vac; or 24/48 Vdc	Single: 120/240 Vac, 125/250 Vdc; 48/125 Vdc, 120 Vac; or 24/48 Vdc	Single: 125/250 Vdc or 120/240 Vac; 48/125 Vdc or 120 Vac; or 24/48 Vdc	Redundant: SEL-9331 Power Supply with 125/250 Vdc or 120/240 Vac; LV 48 Vdc	Single (external): SEL-9331 Power Supply with 125/250 Vdc or 120/240 Vac; LV 48 Vdc	Single (internal): SEL-9331 Power Supply with 125/250 Vdc or 120/240 Vac; LV 48 Vdc
Ethernet Ports	2	2	2	2	3	5	2 standard; 4 per PCI card (up to 2 cards supported)	2	2 standard; 4 per PCI card (up to 1 card supported)
Serial Ports	4	3	4	4	17 (standard)/33 (3U)	16	8 standard; 6 per PCI card (up to 3 additional cards supported)	2	8 standard; 6 per PCI card (up to 1 additional card supported)
USB Ports	USB-B	USB-B	USB-B	USB-B	USB-B	6 USB-A	6 USB-A
Size/Mounting	Surface or DIN-rail mount	Surface or DIN-rail mount	5U rack/panel or surface mount (10-slot, 4-slot, and dual 4-slot)	1U half-rack/panel, surface, or DIN-rail mount	3U or 1U rack/panel mount	1U	3U	Surface mount	Surface mount
Digital and Analog Input/Outputs	1 digital output/1 digital input	3 digital outputs/8 digital inputs	Available modules: - Digital inputs - Digital outputs - Fast high-current digital outputs - DC analog inputs - AC analog inputs - DC analog outputs	1 digital output/1 digital input	1 digital output/1 digital input (standard); 8 digital outputs/24 digital inputs (3U)	1 universal input/1 Form C digital output—alarm contact	Form C digital output—alarm contact	Form C digital output—alarm contact	Form C digital output—alarm contact
Other Features	Conformal coating, V.92 modem, ambient light sensor, and accelerometer	Conformal coating, ambient light sensor, and accelerometer	Conformal coating	Conformal coating	Conformal coating	Conformal coating	Conformal coating	Conformal coating	Conformal coating

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Protocols

The following protocols are offered as standard options on all the RTACs.

CLIENT

• CDC Type II
• Courier
• CP 2179
• DNP3 Serial, DNP3 LAN/WAN
• eDNA*
• Flex Parse
• IEC 60870-5-101/104
• IEC 60870-5-103
• IEEE C37.118 Synchrophasors
• LG 8979
• Modbus RTU, Modbus TCP
• SEL Protocols
• SES-92
• Simple Network Management Protocol (SNMP)

*Only available on the SEL-3555 and SEL-3560

SERVER

• CDC Type II
• DNP Modbus
• DNP3 Serial, DNP3 LAN/WAN
• File Transfer Protocol (FTP)/Secure FTP (SFTP)
• IEC 60870-5-101/104
• IEEE C37.118 Synchrophasors
• LG 8979
• Modbus RTU, Modbus TCP
• SEL Protocols
• SES-92
• SNMP Agent

PEER TO PEER

• Network Global Variable List (NGVL)
• SEL Mirrored Bits Communications

Options