ProMinent Aegis-II, Руководство по сборке и эксплуатации, Страница: 36 / 102

Mounting and Installation
Page 36 of 102
Figure 34 Digital
Input wiring
6.3.8 Temperature [Input H]
The Aegis II uses a 10mV/°K sensor on analog input H, or a 100
:
or 1000
:
RTD connected to the
pH input driver card, if available. Either can be used for temperature display, control or
compensation.
A 1KΩ test resistor placed across the H +/- input should net appro ximately 140⁰F depending on the
resistor tolerance. See Figure 33.
6.3.8.1 Digital Inputs O through V
Inputs O through V are digital inputs. They expect to monitor dry contact signals
from contact head and paddlewheel watermeters or any dry contact switch or
relay tip. See figure 31. Wire the input between the + and
– terminals. See figure
34. Black is on + and white is on -. +V is not used in this example.
Each input has a 16 volt (+V) terminal available as a power source for the sensor or input device. These
power sources can also be used to power a 4-20mA loop for the G input. See section
6.3.7.2 The G input (4-
20mA).
Digital watermeters that use these terminals must not supply a sine wave or powered signal. If the meter
uses a ‘hall effect’, ‘open collector’ or ‘dry contact’ output, you can connect to these inputs.
For additional watermeter information and termination examples, refer to Prominent publication “ Industrial
Watermeters - Contact Head and Paddlewheel Specification A7 ”. Th is document can be downloaded from
the Prominent.us web site. Enter ‘watermeter’ in the search box and press enter. Click on the document to download it.
6.3.9
Sensor Driver Cards
The following sections identify wiring diagrams of the sensor driver cards. There are three available expansion slots as shown
in section
6.3.5 General Layout and Terminal Diagram.
NOTE:
The drawings show the location of connections and are meant to be used with the adjoining tables which provide
additional information for wiring connections.
There are currently six expansion cards to choose from. Each is described in detail below.
Dual Serial Input card (CTFs-LPR-DP)
Dual CT (Conductivity/Temperature)
Dual pH-ORP-Temp Driver
ORP/pH Temp mA Input card
Dual 4-20mA Input Driver
Dual 4-20mA Output Driver
The three expansion slots are shown in figure 35 and figure 14.
Note the letter designations in yellow. Inputs on these cards will be
identified in the program by these letters for clarity.
Figure 35 Expansion Card Slots and Letter Designations
Various types of watermeter use the V+ terminal. The color and purpose of the wires does not adhere to a standard.
Some meters use black for power and red for the signal. Check the watermeter manual.