Article
SEL RTAC
SEL RTAC Hardware Platforms — SEL-3530, SEL-3354, SEL-3555
By NFM Consulting
1 min read
Key Takeaway
Hardware comparison of SEL RTAC platforms — SEL-3530 (rack-mount), SEL-3354 (ruggedized Linux), SEL-3555 (next-gen cybersecurity) with ports, power, and selection guidance.
Quick Answer
Three RTAC platforms: SEL-3530 (established rack-mount, broad protocol support), SEL-3354 (ruggedized Linux for high-processing), SEL-3555 (next-generation with secure boot, TPM, and enhanced cybersecurity for NERC CIP).
SEL-3530
- 19-inch rack-mount, 2U
- Multiple RS-232, RS-485, Ethernet ports
- Expansion card slots for additional serial/Ethernet/C37.118
- 24/48/125VDC or 120/240VAC power
- IRIG-B time sync input
- Substation EMC rated
SEL-3354
- Industrial PC form factor, Linux-based
- Higher computing capacity for large tag databases
- DIN rail or panel mount
- Same ACSELERATOR RTAC software
SEL-3555
- Secure boot, hardware TPM
- Signed firmware updates
- Updated cryptographic support
- Preferred for new NERC CIP deployments
- Forward-compatible with SEL-3530 projects
Time Synchronization
IRIG-B from GPS clock (SEL-2407) or NTP over Ethernet. Critical for event timestamp correlation across relays.
Frequently Asked Questions
Multiple RS-232, RS-485, and Ethernet ports with expansion card slots for additional serial, Ethernet, and C37.118 interfaces.
IRIG-B from an external GPS clock (e.g., SEL-2407) provides precise time. NTP over Ethernet is an alternative.