This is a Harting 10/100/1000 Mbit/s 5-Port RJ45 DIN Rail Mount Ethernet Switch. Its part number is 24034050010.

Specifications:

• Dimensions: 25 x 142 x 107.5 mm
• Life Hours: 1.9711 million hour MTBF
• Number of Ports: 5
• Operating Temperature: 0 to 55 C
• Series: eCon 3000 Series
• Special Features: FCC CFR 47 Part 15 ; cUL US 508 listed ; DNV ; GL ; ABS ; NK
• Supply Voltage: 9 - 60 VDC