Quick Start Guide Minipack PS System 356808.103, 1v2-2008-10
21
Standard Relays & Digital Inputs
Correct Use of Digital Inputs (example)
Normal Mode
External Relay Y
(Energized coil)
+
—
Digital Input
(De-energized coil)
NC
NO
Com
Standard Alarm Relays & Digital Inputs Connections
The alarm outputs in Minipack 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)
In order to implement monitored fail-safe digital inputs
circuits, the external relay coil must be energized and the
contacts closed in the system’s normal mode of operation.
Alarm Interface Card ~ Terminals & Pin-out
The Smartpack controller’s alarm and digital input monitoring signals are accessible from the
controller’s rear panel, on mini power connector CON1 (2 outputs & 2 inputs).
Using the Alarm Interface Card (Art. 218470) plugged to Smartpack’s CON1, you can make the
signals on CON1 accessible on terminal block X1.
For detailed information about the card’s pin-out location and terminal block connections, see the
figures in this section.
1
The figure shows the position of the relay contacts when the PS
system is in alarm mode of operation; the relay coils are then de-
energized (fail-safe mode). The relay outputs are preprogrammed
from factory (Factory Settings).