User's Manual

µLink System Manual 862-01545
Page 14 Issue 1b
Wayside Service
Channel
Description
• One (1) wayside service channel of RS-232 serial
data up to a baud rate of 19200 is provided.
• The serial data channel provides simultaneous,
full duplex serial data transfer between stations.
Data rates range from 300 to 19200 baud. The
RS-232 standard is provided, with the following
signals : TxD, RxD and Signal Ground.
• The interface provides a DCE (Data
Communications Equipment) interface mode.
Auxiliary/Alarm
Interfaces
Description
a. Two (2) inputs (for sensing contact closure or
opening) are provided to sense site alarm inputs.
The states of these alarm inputs are accessible
from connected management equipment, as well
as from the IU Front Panel.
b. Two (2) relay contact outputs, normally open
(N.O.) and normally closed (N.C.) contacts, are
provided as alarm / auxiliary outputs. Output
states are software customised and controlled.
The outputs are used to indicate alarm or other
states selected by the operator.