ABB S800 - Page 158

Table 35. MTU Usage and Key Settings for CI840 and TB840
Module Type
TU840/
TU841
TU846/
TU8
47
Mech. Key Settings
Key1 Key 2
CI840 X A A
TB840 X A B
Power Supply and Cooling Requirements Section 3 Technical Data and Performance
158 3BSE015969-600 A
Table 34. MTU Usage and Key Settings for Intrinsic Safety Interfacing Units
Module Type
TU890/TU891
Compact
Mech. Key Setting
(1)
(1) Note that the shape and style of the key on the TU890/TU891 MTUS is different from the
standard MTU’s.
Key 1 Key 2
AI890 X A C
AI893 X B A
AI895 X A E
AO890 X A D
AO895 X A F
DI890 X A A
DO890 X A B