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NT1 T400 User Manual 61212016L1-1
Figure A-1: NT1 T400 Circuit Pack Connector Pin Assignments
S/T Transmit
(Customers 1 & 2
in parallel)
U Transmit/Receive
S/T Transmit
(Customers 1 & 2
in parallel
55
53
51
49
47
45
43
41
39
37
35
33
31
29
1
3
5
7
9
11
27
25
23
21
19
17
15
13
56
54
52
50
48
46
44
42
40
38
36
34
32
30
2
4
6
8
10
12
28
26
24
22
20
18
16
14
DR
DT
TT
TR
-48V
Frame GND
Backup Power
1
S/T Power
M
E
GND
Frame
GND
R1
T1
When pin 25 is pulled to ground,
the NT1 Type 400 is signaled that
its battery backup is in use.
1