# (c) 2026 NetBox Labs, Inc.
# Licensed under the NetBox Limited Use License v1.0
# https://netboxlabs.com/ndx/license
# Community DTL portions licensed under Apache 2.0:
# https://github.com/netbox-community/devicetype-library
---
manufacturer: Schweitzer Engineering Laboratories
model: SEL-311L
slug: schweitzer-engineering-laboratories-sel-311l
part_number: SEL-311L
u_height: 2
is_full_depth: false
weight: 6.0
weight_unit: kg
comments: Line current differential + distance backup; dual Ethernet; synchrophasors;
  2U rack-mount; IEEE 1613; -40 to +85C
interfaces:
- name: Ethernet 1
  type: 100base-tx
- name: Ethernet 2
  type: 100base-tx
- name: Serial 1
  type: other
  label: EIA-232/485
- name: Serial 2
  type: other
  label: EIA-232/485
- name: IRIG-B
  type: other
  label: IRIG-B time sync input
console-ports:
- name: Console
  type: de-9
  label: EIA-232 Console
power-ports:
- name: Power
  type: dc-terminal
  maximum_draw: 25
  description: 125-250 Vdc or 110-240 Vac
description: Line Current Differential Protection and Automation
