Module Descriptions, RFL 9508D Digital Section
8.4.2
FEATURES
TRIP
HOLD
This is a timer function which extends the length of time that a trip output is activated after a
valid trip condition occurs. For this function to engage, a valid trip condition must exist long
enough to satisfy the pretrip timer. The length of time is programmable independently for each
function.
INPUT
DE-BOUNCE
This is a timer function which requires that a trip input be present for a certain length of time
before a trip command is transmitted. The length of time is not programmable by the user, but
is set at the factory to 100
μ
s.
ALARM
TIMER
This is a timer function which requires that an alarm condition exists for a certain length of
time before an alarm output is generated. The length of time is programmable by the user.
PRE-TRIP
TIMER
This is a timer function which requires that a trip be present for a certain length of time
before an output is generated. The length of time is programmable independently for each
function.
COMMUNICATION
CHARACTERISTICS
This module communicates using a single bi-directional DS0. The communication includes
programmable addressing to prevent misconnections. One of 32 addresses is selectable.
PROGRAMMABLE
LOGIC
Trip hold
0.25 – 63.75 ms (0.25 ms increments)
Output Form
normal/invert
Alarm timer (delay)
0 - 2.5 Sec. (10 ms increments)
Pre-trip timer
0 – 3.75 ms (0.25 ms increments)
Unblocking
Enable/Disable
Sequence of events log
100 records
Operational modes
Transfer Trip/DCB
RFL 9508D UCC
RFL Electronics Inc.
March 11, 2010
8-27
(973) 334-3100
