IBM PS/2 CL57 SX Hardware Maintenance Reference page 18

IBM PS/2 Model CL57 SX HMR
System Expansion Connector
1.2.9 System Expansion Connector
This is a 150-pin connector that can accept a communications cartridge II
to support various communication capabilities provided with a 16-bit Micro
Channel adapter installed in the cartridge.
¦ Copyright IBM Corp. 1991
1.2.9 - 1