Short-Circuit On The Com Loop; Programmable Voltage Outputs (S0-S1) - Panasonic EBL128 Planning Instructions

Panasonic Electric Works Nordic AB
MEW01090 Rev: 3
4.1.3
4.2

Short-circuit on the COM loop

Short-circuit between the L (SA) and C (SB) wires
fault with the following fault message:
FAULT: Short-circuit SCI n <-> SCI n
n = A, B, 0, 1, 2, 3, 4, 5, 6 or 7 depending on if no 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<->0 or 0<->B
If two isolators (no. 0 and no. 1) are used: A<->0, 0<->1 or
1<->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).
th
Each 10 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.

Programmable voltage outputs (S0-S1)

The outputs S0-S1 are normally supervised (monitored).
33K resistors can be connected. Connections to "J1:5-8" according to
drawing 128-22. When the connections are finished, a calibration has
8
to be done. See also the EBL128 Operating Instructions chapter
"Calibration of supervised outputs (menu H5/A3)".
Each output has to be programmed (via Win128) 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.
S0: max. 500 mA (Fuse F8).
6
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.
7
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.
8 The calibrated value has to be in the range 4K7 – 50K.
9
Regarding system voltage, see chapter "Technical data", page 143.
EBL128 Planning Instructions V1.1.x
18
6
will generate a
5
7
One to five
9
.