Panasonic Eco Solutions Nordic AB
MEW01622 Rev: - EBL128 Planning Instructions V2.0.x
20
4.1.3 Short-circuit on the COM loop
Short-circuit between the L (SA) and C (SB) wires
will generate a
fault with the following fault message:
FAULT: Short-circuit SCI nn <-> SCI nn
nn = A, B, 00, 01, 02, 03 and up to 63 depending on if none, one or
several isolators are used. A & B are the built-in control unit
isolators in the A- and B-direction respectively.
If no isolator is used the information will be: A<-> B.
If one isolator (no. 0) is used: A<->00 or 00<-> B
If two isolators (no. 00 and no. 01) are used: A<->00, 00<->01
or 01<-> B
...and so on.
The short-circuit is in the specified segment, e.g. A<->0.
In case of short-circuit in more than one segment on the COM loop,
the fault messages will be similar to the message shown for several
breaks (cut-offs), FAULT: Several... (see above).
Each 10
th
minute a new attempt is made to communicate in the A-
direction only.
When the fault is corrected (no short-circuit) the communication
automatically returns to communicate in the A-direction only.
6
4.2 Programmable voltage outputs (S0-S1)
The outputs S0-S1 are normally supervised (monitored).
One to five
33K resistors can be connected
. Connections to "J1:5-8" according to
drawing 128-22. When the connections are finished, a calibration has
to be performed
9
. See also the EBL128 Operating Instructions chapter
"Calibration of supervised outputs (menu H5/A1)".
Each output has to be programmed (via EBLWin) regarding:
Type (Control, Fire ventilation, Alarm device, etc.)
Output signal period (steady, intermittent, pulse, delay, etc.)
Supervised / Not supervised
Logic, i.e. normally low (default) or normally high (24 V DC)
.
Control expression (containing one or more trigger conditions)
NOTE! The outputs S0-S1 are as default programmed as outputs for
alarm devices.
Depending on the cable type / length and where the loop short-circuit is
located, it can take up to 10 seconds before the fault is generated.
A normally high output can not be supervised. The supervision voltage is
1.5 – 3.6 V DC (depending on the number of supervision resistors) and the
polarity is reversed compared to activated output.
P.c.b. no. 9285-5A: One to five 470 nF capacitors. The calibrated value
has to be in the range 4K7 – 50K and 1 to 5 x 470 nF respectively.
Regarding system voltage, see chapter "Technical data", page 143.
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