This module is docked laterally to the expansion unit B-537 or B-538 already existing modules. So can be realized with the appropriate modules to 200 measurement channels.

Suitable for use with the Graphtec GL820 Data Logger to add an additional 20 terminals. The B-538 is a terminal set only and used to expand the terminals/channels after initially using the Terminal Expansion Kit B-537 which includes the Terminal Expansion Cable.