| SEL-3530 3U/1U | SEL-3530-4 | SEL-3505 | SEL-3505-3 | SEL-2240 Axion With SEL-2241 Module | SEL-3555 RTAC | SEL-3560E RTAC | SEL-3560S RTAC | |
| Processor | 533 MHz | 533 MHz | 333 MHz | 333 MHz | 533 MHz | 2.0 GHz Xeon quad-core | 2.0 GHz Xeon quad-core | 2.0 GHz Xeon quad-core |
| RAM | 1 GB | 1 GB | 512 MB | 512 MB | 1 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 |
| 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 +75°C | –40° to +60°C | –40° to +75°C |
| Graphical Web-Based HMI | Viewing and control via web browser | Viewing and control via web browser | None | None | Viewing and control via web browser | Viewing and control via web browser; integrated video; 1 DisplayPort; 1 DVI/VGA port; 1 DVI-D port | Viewing and control via web browser; integrated video; 1 DisplayPort; 1 DVI/VGA port; 1 DVI-D port | Viewing and control via web browser; integrated video; 1 DisplayPort; 1 DVI/VGA port; 1 DVI-D port |
| Power Supply | 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: 12/24 Vdc | Single: 12/24 Vdc or 24/48 Vdc | Redundant: 120/240 Vac, 125/250 Vdc; and/or 24/48 Vdc | Redundant: 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 | Single (external): SEL-9331 Power Supply with 125/250 Vdc or 120/240 Vac; LV 48 Vdc |
| Ethernet Ports | 3 | 2 | 2 | 2 | 2 | 2 standard; 4 per PCI card (up to 2 cards supported) | 2 standard; 4 per PCI card (up to 1 card supported) | 2 |
| Serial Ports | 17 (standard)/33 (3U) | 4 | 4 | 3 | 4 | 8 standard; 6 per PCI card (up to 3 additional cards supported) | 8 standard; 6 per PCI card (up to 1 additional card supported) | 2 |
| USB Ports | USB-B | USB-B | USB-B | USB-B | USB-B | 6 USB-A | ||
| Size/Mounting | 3U or 1U rack/panel mount | 1U half-rack/panel, surface, or DIN-rail mount | Surface or DIN-rail mount | Surface or DIN-rail mount | 5U rack/panel or surface mount (10-slot, 4-slot, and dual 4-slot) | 3U | Surface mount | Surface mount |
| Digital and Analog Input/Outputs | 1 digital output/1 digital input (standard); 8 digital outputs/24 digital inputs (3U) | 1 digital output/1 digital input | 1 digital output/1 digital input | 3 digital outputs/8 digital inputs | Available modules:
| 1 digital output/1 digital input | 1 digital output/1 digital input | 1 digital output/1 digital input |
| Other Features | Conformal coating | Conformal coating | 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 |
Protocols
The following protocols are offered as standard options on all the RTACs.
CLIENT
*Only available on the SEL-3555
SERVER
*Only available on the SEL-3555
PEER TO PEER
Options
| SEL-3530 3U/1U | SEL-3530-4 | SEL-3505 | SEL-3505-3 | SEL-2240 Axion With SEL-2241 Module | SEL-3555 RTAC | SEL-3560 RTAC | |
| IEC 61850 Options | |||||||
| IEC 61850 MMS and MMS Client File Services | |||||||
| IEC 61850 MMS and MMS Server File Services | |||||||
| IEC 61850 GOOSE | |||||||
| Fieldbus | |||||||
| EtherCAT to SEL Axion I/O Modules | |||||||
| HMI | |||||||
| Graphical Web-Based Viewing and Control | |||||||