Raytheon STD 21 GPS, Operation Manual, Page: 53 / 119

Satellite Compass
STD 21 GPS
STD 21 GPS
45
Edition: Feb. 05, 2007
3717/110--850.DOC020002
3.3.3 Connecting the supply voltage to the Processor Unit and the Operator Unit
Terminal board C1
Figure 38: Power supply connection to the Processor Unit
Recommended cable type is 1.5 to 2.5mm
2
, shielded (supply voltage to the Processor
Unit).
Strip off and lay the cable according to section 3.1.1. The cable cores must be con-
nected to the terminals according to appended drawings or to the table below.
Terminal Designation
1 24 VDC supply voltage input Processor Unit--extendable for
external supply
2 0 VDC supply voltage input Processor Unit--extendable for
external supply
3 Case housing--extendable for external supply
4 24 VDC supply voltage output to Operator Unit
5 0 VDC supply voltage output to Operator Unit
The Operator Unit supply voltage also must be connected at terminal board C1.
The connection cable is part of the delivery with the part no. NB60--146.
For the connections at the Operator Unit, see section 3.4.4.2.
Note:
Practice has shown that a ship‘s 24V DC supply may be adversely affected by gener-
ators or other power consumers. Therefore, in order to secure the proper operation of
the STD 21 GPS, it is highly recommended to supply the STD 21 GPS, as well as the
heading receivers connected through the Ports 3 and 4, through an AC/DC converter in
accordance with the cable and connection diagrams 114--001.HP009 and
110--850.HP008.