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Output Relays
Control Functions
The output relays are also called digital outputs. Any internal signal
can be connected to the output relays using output matrix. An output
relay can be configured as latched or non-latched. See output matrix
for more details.
NOTE: If the Allen-Bradley device has the mA option, it is
equipped with only three alarm relays from A1 to A3.
The difference between trip contacts and alarm contacts is the DC
breaking capacity. See "Trip Contacts" and "Alarm Contacts" in
Chapter 10 for details. The contacts are SPST normal open type
(NO), except alarm relays A1, A2 and A3, which have change over
contacts (SPDT).
Table 6.1 – Parameters of Output Relays
Parameter
Value
T1 ... T14
0
1
A1 ... A5
0
1
IF
0
1
Force
On
Off
REMOTE PULSES
A1 ... A5
0.00 ... 99.98
or
99.99
NAMES for OUTPUT RELAYS (editable with SetPointPS only)
Description
String of
max. 32
characters
Set = An editable parameter (password needed)
F = Editable when force flag is on
Unit
Description
Status of trip output relay
(The actual number of relays
depends on the ordering code)
Status of alarm output relay
Status of the internal fault indication
relay
Force flag for output relay forcing for
test purposes. This is a common flag
for all output relays and protection
stage status, too. Any forced relay(s)
and this flag are automatically reset
by a 5-minute timeout.
s
Pulse length for direct output relay
control via communications
protocols.
99.99 s = Infinite. Release by writing
"0" to the direct control parameter
Names for DO on SetPointPS
screens. Default is
"Trip relay n", n=1...14 or
"Alarm relay n", n=1...5
6
Chapter
Note
F
F
F
Set
Set
Set
857-UM001A-EN-P – July 2009
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