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User Available Signals
As shown on the electrical circuit diagram for the
connections with external devices, and below figures, there
are several electrical contacts available on the electronic
control unit terminal board, to be used for the interface
with external devices such as systems for remote data
transmission, remote monitoring and remote surveillance.
The signals do not have a typology that is homogeneous.
There are two different typologies:
Legend:
1 Dosaodor-D power supply
2 Relay suitable for 12V
x + Connection on the M4 slot (ref. 1 to 8)
y - Connection on the M4 slot (ref. 9 to 16)
12V Dc
-
1
Here follow the electrical specifications of the contacts:
- Maximum voltage applicable : 30 V DC
- Maximum current applicable
- Duration of the pulse (closing) : 1 second
The signals included in this category are:
- Gas volume supplied (weight of programmable pulse)
- Volume of odorant injected (weight of programmable pulse) Terminals 2 & 10 of M4
- Injector 1 alarm (Normally Open contact)
- Injector 2 alarm (Normally Open contact)
- Dosaodor-D – disabled (Normally Closed contact)
- Odorant low level in Suction Tank ( N.A.)
- GCU Command – Pulse Signal to GCU Relay
- Control Run/Wait of Dosaodor-D SLAVE (Open = Run)
Analog output signals:
The electrical specifications of the analog output signals are:
- Range
- Configuration
- Maximum accept. load : 300 Ohm
The signals included in this category are:
- Instantaneous concentration 0-100 mg/m
- Average Day concentration
+
Figure 14. Internal Supply Connections
: 200 mA
: 4 – 20 mA
: Source 12 Vdc (output supply 12 Vdc)
3
(0-10 lb/MMCF) Terminals 1 & 3 of M1
0-100 mg/m
3
(0-10 lb/MMCF) Terminals 2 & 4 of M1
Open Collector digital output signals with a grounded‑
base opto‑isolated connection corresponding to the
installed cards:
Use of Internal power supply
In the case the user needs to acquire signals using the
internal power generator of the Dosaodor-D, the connection
schematic is the following:
To application
RELAY
2
Terminals 1 & 2 of M4
Terminals 3 & 11 of M4
Terminals 4 & 12 of M4
Terminals 5 & 13 of M4
Terminals 6 & 14 of M4
Terminals 7 & 15 of M4
Terminals 8 & 16 of M4
Dosaodor-D
+
-
M4/X
M4/Y
23
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