ProMinent Aegis-II, Руководство по сборке и эксплуатации, Страница: 35 / 102

Mounting and Installation
Page 35 of 102
The main PCB inputs are shown in Figure 31.
Figure 31 Main board inputs
Inputs A and B are Prominent serial sensor inputs. Serial sensor choices currently include CTFS (Conductivity, Temperature,
Flowswitch
– Serial) and LogR serial corrosion sensors. These sensor have 3 wires; transmit, receive and common. Do not
connect other probes to these inputs. Notice the color code of the wires is stenciled on the main board. The A input has a
serial sensor attached to show the wire color matching the stencil; red, black and green.
Additional serial sensors may be added to the controller via expansion driver cards. See section
6.3.7.2 The G input (4-20mA)
The G input is for 4-20mA devices. This includes analog tank level, flow rate, temperature, analyzer signals, PLC signals, etc.
The G input is not programmed for Prominent amperometric sensors including pH and ORP sensors that have been
converted to 4-20mA. This input is not used for Pyxis or Little Dipper sensors as well. All of these sensors require the 4-20mA
expansion input card covered in the next section.
The 4-20mA loop input at G can be powered by the Aegis II
controller or from the signal source. Figure 32 shows examples
of both.
In both examples, the red wire is the + and the black wire is the -.
The on-board power example shows us acquiring loop power from
the O input. Any unused digital input can be used.
The red + wire is connected to the power +V on the O input.
The black
– wire connects to the + input of G.
A jumper (white) is used to complete the loop from the power – on
O to the G-.
Temperature compensation cannot be applied to this input, because
the influence of the temperature measurement on the measured
value is not known.
Using on-board power Remotely powered
Figure 32 ‘G’; 4
-20mA input
The CTFS sensor is not the same as a CTF sensor. The CTF sensor is not
serial and has 6 wires. The Aegis II uses the 3 wire CTFS sensor.
There are two types of corrosion rate sensors. The serial sensors have 3
wires. See the Spare Parts section for a list of compatible sensors