INDUSTRIAL PRODUCTS I/O SUBSYSTEM USER GUIDE, EK-0PIOS-UG-005, 5th Edition, July 1980
http://www.bitsavers.org/pdf/dec/pdp11/industrialProducts/EK-0PIOS-UG-005_IO_Subsystem_User_Guide_Jul80.pdfPage 6-12-1 (page 228 of the PDF)
M6011 16-BIT ONE SHOT OUTPUT
FUNCTIONAL DESCRIPTION
The M6011 module provides 16 program-controlled dc outputs. These outputs are nonisolated, single wire, one shot, open collector, Darlington switches used for operating devices that must be activated for only a short duration, such as relays, solenoid valves, etc. Output timing is selectable from 100 microseconds to 5 seconds on a per-byte basis via switches located on the module. Provision is made for reading the module's output status or generic code and for disabling all outputs. The module also features a common output fuse and switches for address selection.
There is a Detailed Description section and a Simplified Block Diagram, but no full schematic. You would need to find a Field Maintenance Print Set. That probably existed at the time, but might be difficult to find a copy now.