Communications Interface - GE ALPS Instruction Manual

3 HARDWARE DESCRIPTION
The communications interface resides on plug-in modules with user selectable jumpers to configure the interface for the
communications application. The two communications types that can be chosen are RS232 and RS485. See the descrip-
tion below for details. See Figure 3–7: BLOCK DIAGRAM OF THE COMMUNICATIONS MODULE below.
JP4 and JP5 select the RS485 type when RS485 commmunications is selected (2 wire/4 wire)
Both jumpers installed: 2-wire type RS485
Both jumpers uninstalled: 4-wire type RS485
(Uninstalled means the jumpers installed on one post -- the outside one -- to store the jumper. There will be no
electrical connection with jumpers in this position)
EXTERNAL CONNECTOR AREA
E D G E C O N N E C T O R
Jumpers JP1, JP2, and JP3 are used to determine the types of communications
JP1 JP2 JP3
O P E N 2-3 O P E N
2-3 O P E N 2-3
1-2 1-2 1-2
Figure 3–7: BLOCK DIAGRAM OF THE COMMUNICATIONS MODULE
GE Power Management
TYPE OF COMMUNICATIONS
R S 2 3 2
R S 4 8 5
Programmable from keypad or communications (refer to Chapters 2 and 12)
ALPS Advanced Line Protection System
3.3 PRINTED CIRCUIT BOARD MODULES

3.3.7 COMMUNICATIONS INTERFACE

3
2
1
E D G E C O N N E C T O R
3
3
2
1
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