User's Manual

Connecting external sensors and systems
Page 27
Table 3 Pin numbers and functions for the Sensor Interface Sensor 2 connector
The following sections describe the hardware specification and interface for the Sensor Interface connections.
The function of the Sensor Interface (in terms of translation of sensor data to AIS messages) is determined by
the software configuration of the AIS AtoN (see section
8.5 for further details). The default configuration and
supported sensors are described in section 9 of this document. For alternate configurations please refer to the
additional documentation supplied with the product or contact your supplier.
7.2.1 Isolated analogue inputs
The extended sensor interface includes two isolated analogue inputs. These inputs are available on the Sensor
2 connector described in
Table 3. The electrical and measurement specification of these inputs is as follows:
● Differential input range 0 to 36V
● Impedance 620KΩ
● 16 bit resolution
The voltage to be measured should be applied across the differential positive and negative inputs.
7.2.2 Non-isolated analogue inputs
The extended sensor interface includes three non-isolated analogue inputs. These inputs are available via the
Sensor 1 connector described in
Table 2. The electrical and measurement specification for these inputs is as
follows:
Pin Signal name Function and notes
1 SENSOR_ISO_DI_1+ Positive connection for the isolating digital input 1
2 SENSOR_ISO_DI_1- Negative connection for the isolating digital input 1
3 SENSOR_ISO_DI_2+ Positive connection for the isolating digital input 2
4 SENSOR_ISO_DI_2- Negative connection for the isolating digital input 2
5 SENSOR_ISO_DI_3+ Positive connection for the isolating digital input 3
6 SENSOR_ISO_DI_3- Negative connection for the isolating digital input 3
7 SENSOR_ISO_DI_4+ Positive connection for the isolating digital input 4
8 SENSOR_ISO_DI_4- Negative connection for the isolating digital input 4
9 SENSOR_ISO_DI_5+ Positive connection for the isolating digital input 5
10 SENSOR_ISO_DI_5- Negative connection for the isolating digital input 5
11 SENSOR_NON_ISO_DI_1 Non isolating digital input 1
12 SENSOR_NON_ISO_DI_2 Non isolating digital input 2
13 SENSOR_NON_ISO_DI_3 Non isolating digital input 3
14 GROUND Ground for digital inputs
15 ISO_ADC1+ Positive connection for the isolating ADC 1
16 ISO_ADC1- Negative connection for the isolating ADC 1
17 ISO_ADC2+ Positive connection for the isolating ADC 2
18 ISO_ADC2- Negative connection for the isolating ADC 2