In the example, the PR021/K has been set as follows:
•
Self-test function disabled
•
K51 configuration = A-A-A-A
•
Master mode
•
Baud rate = 19.2Kb/s
•
Stand-by function not active
•
Manual Reset mode
•
Latch mode disabled
•
Local bus not terminated
5.4.2. Signals
The signals (K51/1...K51/8) for the SACE PR112 protection release may be divided into 2 modes: Normal and Latch. A
description of the signals in these modes is given below.
5.4.1.1.
Normal mode (see par. 4.5.1)
Dip-switch no. 11 to be set to its OFF position.
Example of dip-switch settings for the PR021/K unit to be connected to the SACE PR112/P release
1 2
3 4
5 6
7
8
9 10 11
12 13
F
OFF
ON
Note 1: Following a TRIP, the status of the signals is frozen signalling the trip (K51/7) and the protection that caused
it.
Note 2: If dip switch no. 10 (RESET) is set to its “MAN” position, the signals may be reset as described in par. 4.2.
Note 3: If dip switch no. 10 (RESET) is set to its “AUT” position, the signals are reset automatically when the trip on
the protection unit is reset (see par. 4.2).
1
2
3
4
5
6
7
8
9
10
11
12
13
Electric
contact
Event that caused closing of the relay
K51/1
L protection alarm or trip (overload)
K51/2
S protection alarm or trip (selective short-circuit)
K51/3
I protection trip (instantaneous short-circuit)
K51/4
G protection alarm or trip (earth fault)
K51/5
Communication problems on the local bus (bus KO)
K51/6
Internal overtemperature alarm or trip
K51/7
Protection release TRIP alarm
K51/8
L function prealarm (overload)
