Nevion FRS-HD-XMUX4 - Manual (Page 14)

FRS-HD-XMUX4 Rev. C
nevion.com | 14
4.2.1 Functions of 8pin modular jack
GPI name Function Pin # Mode Direction
Status General error status for
the module.
Pin 1 Inverted Open
Collector
(open is alarm)
Output
GPI 1 Reserved for future use Pin 2 TTL, 0V =
active level
Input
GPI 2 Reserved for future use Pin 3 TTL, 0V =
active level
Input
DATA-link
output
RS422+ Pin 4 RS422 Output
DATA-link
output
RS422- Pin 5 RS422 Output
GPI 3 Reserved for future use Pin 6 TTL, 0V =
active level
Input
GPI 4 Reserved for future use Pin 7 TTL, 0V =
active level
input
Ground 0 volt pin Pin 8 0V.