HP-Agilent/Keysight 66000A

The Hp 66000A modular power system simplifies test-system assembly, cabling, programming, debugging and operation. The 66000A is 4 U, 8 slot mainframe that accepts 1 to 8 modules below in any combination. Modules are ordered separately.
Features:

High density: eight slots in 7 inches of rack space
Output sequencing
Low ripple and noise
High-accuracy read-back of voltage and current over GPIB
Standard Commands for Programmable Instruments (SCPI)
Optional keyboard and display unit
Serial link to connect two mainframes at one GPIB address
Optional isolation and polarity-reversal relays
Built-in self-test
Datasheet