14
Installation Dragon PTN Nodes
Release 01 02/2018
Figure 10
Example: Digital Input (=DI): Closed Input
g.
DO (=Digital Output) Connector (RJ45)
Two digital output contacts (=DO) are available on the NSM front panel (Figure 6) for output-
ting minor/major alarms. These outputs can be used for example to activate an alarm siren.
These alarms can be configured in HiProvision, see Ref. [1] in Table 1. The operation of these
contacts influences the DO LEDs, see Table 4.
These contacts are change-over contacts on a relay activated by a logical ‘1’. Maximum cur-
rent through such a contact: 1A DC; maximum voltage: 60 VDC. The DO connector in Figure 9
has following pin allocation:
Table 6
DO Pin Allocation
Pin Contact Pin Name DO (Output) Description
Alarm
1
DO1
C1
Out Common 1
Minor Alarms
2
DO1
NC1
Out Normal Closed 1
3
DO1
NO1
Out Normal Open 1
4, 5
---
---
---
---
6
DO2
C2
Out Common 2
Major Alarms
7
DO2
NC2
Out Normal Closed 2
8
DO2
NO2
Out Normal Open 2
How the DO contacts behave in a normal (no alarm) and an alarm situation can be found in
the figure below:
I/O
1
2
NSM
DI
In1a
In1b
HiProvision:
Expected: Current Detected = YES
Measured: Current Detected = YES
Expected = Measured
à
no alarm
I/O
1
2
NSM
DI
In1a
In1b
normal:
closed door,
current flows
HiProvision:
Expected: Current Detected = YES
Measured: Current Detected = NO
Expected ≠ Measured
à
ALARM RAISED
alarm:
opened door,
no current
