Toshiba NV Series Hardware Manual page 29

Chapter 1 Overview of T Series Migration
(2) Base unit for T series migration systems
Base unit for T series migration systems BUM7B replaces T3/T3H base units BU31A
and BU35B.
BUM7B which has the same exterior dimensions (width and height) with BU31A and
BU35B can be mounted on the same mounting holes as BU31A and BU35B. BUM7B is
used as the main base unit or remote base unit with TC-net I/O loop by mounting
controller module PUM12 or G2 I/O adapter module GA922 on slot S0.BUM7B
accommodates 10 G2 I/O modules as the main base unit, or 11 G2 I/O modules as the
remote base unit. The number of mountable I/O modules is the same as T3/T3H main
base unit BU31A (10) or expansion base unit BU35B (11).
BUM7B is not equipped with expansion interface (IF661). When used as the main base
unit, therefore, it cannot connect the expansion base unit. For the same reason, BUM7B
cannot be used as the expansion base unit.
The photo below shows the appearance of BUM7B.
Using the internal wiring up to the I/O module (G3 I/O) terminal block of the existing
T3/T3H, base unit BUM7B can be combined with the terminal block signal conversion
adapter. This facilitates upgrading from T3/T3H series I/O module (G3 I/O) to the G2 I/O
module
10
6F8C1497
Figure 1.1 Appearance ofBUM7B