4 ST70+ User Reference Manual
Figure 1-3: Keypad dimensions
Power supplies
In a typical ST70+ system, displays and keypads are powered by 12 V dc from
SeaTalk
ng
. The power loading from SeaTalk
ng
is described in terms of a Load
Equivalency Number (LEN) for each product.
Each display has a LEN value of 1 and each keypad type has a LEN value of 2.
When planning an ST70+ system, take into account the total LEN of all the products
you intend installing, to ensure SeaTalk
ng
is not overloaded. Refer to the SeaTalk
ng
Reference manual to ensure correct installation.
3.62 in
(92 mm)
0.27 in
(7 mm)
1.36 in
(34.5 mm)
D11375-1
5.35 in
(136 mm)
3.62 in
(92 mm)
0.88 in
(22.5 mm)
1.36 in
(34.5 mm)
5.35 in
(136 mm)
87099_1.book Page 4 Thursday, March 12, 2009 10:18 AM
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