RFL 9508 PLC-TT
RFL Electronics Inc.
September 5, 2012
2
(973) 334-3100
FEATURES
TRIP HOLD TIMER
This timer function 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 timer function 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
100µs.
ALARM TIME DELAY
This timer function 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 timer function 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.
ZONE EXTENSION
A continuous trip signal can be sent by means of zone extension. (A periodic code sent from the
transmitting side to maintain a latched trip on the receiving side).
COMMUNICATION CHARACTERISTICS
This module communicates using a single bi-directional DS0.
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
