GE Mark VIeS, System Manual, Page: 121 / 486

5.4 TBCIS#C Contact Input with Group Isolation
The Contact Input with Group Isolation (TBCI) terminal board accepts 24 dry contact inputs wired to two barrier-type
terminal blocks. For contact excitation, dc power is wired to TBCI. The contact inputs have noise suppression circuitry to
protect against surge and high-frequency noise.
Caution
Some panels contain a mixture of ac and dc wetting voltages. To prevent misoperation
and damage these terminal boards, care must be taken to avoid connecting the ac
wetting voltages to the terminal board wetting voltage inputs. Furthermore, verify
that the ac wetting voltages and the dc wetting voltages are not inadvertently
cross-connected.
DC-37 pin
connectors with
latching fasteners
Shield
Bar
2
4
6
8
10
12
14
16
18
20
22
24
x
x
x
x
x
x
x
x
x
x
x
x
x
1
3
5
7
9
11
13
15
17
19
21
23
x
x
x
x
x
x
x
x
x
x
x
x
x
26
28
30
32
34
36
38
40
42
44
46
48
x
x
x
x
x
x
x
x
x
x
x
x
x
25
27
29
31
33
35
37
39
41
43
45
47
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
JS1
JR1
JT1
JE2 JE1
12 Contact
Inputs
12 Contact
Inputs
Barrier type terminal blocks
can be unplugged from
board for maintenance.
J - Port Connections:
Plug in I/O Pack(s)
for Mark VIe system
The number and location
depends on the level of
redundancy required .
J - Port Connections:
Plug in I/O pack(s)
For Mark VIe /
control systems
Use JR1 for
simplex
Contact Input Terminal Board
YDIA Discrete Input Modules GEH-6855_Vol_II System Guide 121
Public Information