Rockwell Automation 1770-M12 Mass Storage Systems - Manual (Page 12)

Hardware Features of the Mass Storage
Systems
Chapter 2
2Ć6
Parallel Channel In J21
This communication port labeled PARALLEL CHANNEL IN J21 allows you to
connect the 1770–M10 system to:
Allen–Bradley’s Advisor 2TM Color Graphic System
Other 1770–M10 Systems
1770–M11 System
Parallel Channel Out J20
This parallel communication port, labeled PARALLEL CHANNEL OUT J20
allows you to expand memory capacity by connecting another 1770–M10
system to this port. Also, the 1770–M12 system connects to the programmable
controller/management system (PC/M) at this port.
Serial Channel J22
This communication port, labeled SERIAL CHANNEL J22 has six slotted
screws. It is where the twinaxial cable connects from the 1770–M11 system to
the PLC–3 peripheral communication module.
Test J23
Using the port labeled TEST J23, you can test the 1770–M11 system’s internal
components. Connect the data cartridge recorder to load the diagnostics
cartridge for the 1770–M11 system; then connect the industrial terminal (or any
RS–232 terminal) to monitor the program’s result.
The diagnostic cartridge for the 1770–M11 system (cat. no. 1770–MDS) can
test up to three 1770–M10 systems when connected to the 1770–M11 system.
RS422 Interface J24
This communication port, labeled RS422 INTERFACE J24 allows you to
connect the 1770–M12 system to the programmable controller/management
system (PC/M).