Eltek PRS Quick Start Manual page 21

Alarms & Monitoring
Fail-Safe Operation ⎯ Alarm Relays & Digital Inputs
Standard Relays & Digital Inputs
NO
Normal Mode
Com
Relay X
(Energized coil)
NC
NO
Alarm Mode
Com
Relay X
(De-energized coil) NC
Flatpack PS System
Correct Use of Alarm Outputs (example)
+
Digital Input X
(Normal mode)
—
+
Digital Input X
(Activated)
—
Flatpack PS System
Correct Use of Digital Inputs (example)
Terminals & Pin-out Location, Alarm Card 100350
DC power systems using the Alarm & Signal Interface Card
have following alarm outputs and monitoring inputs available: 6 alarm relay outputs, 4 digital
inputs, 3 symmetry alarm inputs and 1 temperature sense input.
For detailed information about the card's pin-out location and terminal block connections,
refer to the figure in this section.
The figure shows the position of the relay
contacts when the PS system is in its alarm
mode of operation. The relay coils are then
de-energized (fail-safe mode). The relay
outputs are preprogrammed from factory
(Factory Settings).
FUNCTION
Digital Input 2
Digital Input 3
Digital Input 4
Symmetry Alarm 2
(digital input)
Symmetry Alarm 1
Symmetry Alarm 3
+21V Auxiliary Supply
200mA (for external equipment)
(Not used)
Temperature Sense
(for internal battery bank)
1.5 mm
* CON2 & CON3 are used for internal connections (connected from factory)
** For correct use of digital inputs, see the Fail-Safe Operation chapter
Quick Start Guide Flatpack PS System
The alarm outputs in Flatpack systems use the Fail-
Safe Operation Mode (relay coils energized in the
+
system's normal operation mode). When the system is
—
in alarm mode, the alarm relay coils are de-energized.
+
The figure shows the position of the relay contacts
—
when the relay coils are de-energized (PS system in
alarm mode)
Normal Mode
External Relay Y
(Energized coil)
In order to implement monitored fail-safe digital
Alarm Mode
External Relay Y
inputs circuits, the external relay coil must be
(De-energized coil)
energized and the contacts closed in the system's
normal mode of operation.
SIGNAL PIN-OUT
CON4
+
1
2
AGND
+
3
4
+
5
6
AGND
+
7
8
AGND
+
9
10
AGND
(From external Symmetry
11 Alarm circuit card, art. 26851)
+
—
12
13
+
—
14
15
+
—
16
(To Modem)
17
18
+
— 19
screen
20
2
, max.
wire section
Temperature
sensor
356803.103, v4-2006-10
Miscellaneous
⎯
Art. 100350, basic version ⎯
Terminals & Pin-out Location
Alarm & Signal Card, Art. 100350
12
CON2*
1
CON3*
CON4
11 20
CON2*
1 10 1
FUNCTION
Common Alarm
Module Alarm
Fuse Alarm,
Load & Battery
Low Battery Alarm
High Battery Alarm
Mains Alarm
CON5
18
SIGNAL PIN-OUT
CON5
1
NC
Relay 6
NO
2
Alarm Circuit 6
Com
3
4
NC
Relay 5
NO
5
Alarm Circuit 5
Com
6
Relay 4
7
NC
NO 8
Alarm Circuit 4
Com 9
10
NC
Relay 3
11
NO
Alarm Circuit 3
Com 12
13
Relay 2 NC
NO 14
Alarm Circuit 2
Com
15
16
NC
Relay 1
NO 17
Alarm Circuit 1
Com
18
13