The following explains the control signals. (The pin numbers of the connector are RJ71C24 PDF enclosed in parentheses)
Mitsubishi
RJ71C24 RJ71C24 Manual RJ71C24-R2 RJ71C24 PDF Manual PDF.
Mitsubishi RJ71C24 Manual PDF.
Mitsubishi RJ71C24-R4 Manual RJ71C24-R4 RJ71C24 Manual RJ71C24 PDF PDF.
RJ71C24-R2 Mitsubishi Commmunication RJ71C24 Manual Module Manual PDF.
RJ71C24 Mitsubishi Module Manual PDF.
Mitsubbishi RJ71C24 PDF RJ71C24 User's Manual(Startup) RJ71C24-R4 PDF Manual.