Chaoyang 4NIC-XMZQ220HT industrial power supply unit. 

•   Model Number: 4NIC-XMZQ220HT
•   Serial Number: C201003251245675
•   Product Type: Industrial Product
•   User/Client: Siemens Medium Voltage Switch Technology (Wuxi) Co., Ltd.
•   Status: Qualified
•   Dimensions:
• 200×160×50
• (likely mm)