INWATER TECHNOLOGIES POINT4 RIU3 User manual

IMPORTANT SAFETY INSTRUCTIONS
READ AND FOLLOW ALL INSTRUCTIONS
SAVE THESE INSTRUCTIONS
RIU3
REMOTE MONITOR/CONTROLLER
INSTALLATION AND
USER’S GUIDE
INWATER
TECHNOLOGIES
POINT4 RIU
Point4 RIU
INWATER
TECHNOLOGIES

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
2
If you have questions about ordering InWater Technologies replacement parts, and products, please use the following
contact information:
CUSTOMER SERVICE / TECHNICAL SUPPORT
Phone: [phone]
E-mail: [e-mail]
Web site
Visit www.inwatertech.com to nd information about
InWater products.
TABLE OF CONTENTS
OVERVIEW
SYSTEM COMPONENTS
SYSTEM WIRING
TYPICAL RIU WIRING CONFIGUATIONS
TYPICAL PROBE WIRING
RIU3 FRONT PANEL
RIU3 OPERATION
CONTROL BLOCK OPERATION
PROBE CALIBRATION
3
4
5
6
7
10
11
19
21
RIU3 Manual Rev. C 11/12/19

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
3
OVERVIEW
This manual is designed as a guide to assist users in becoming familiar with the various functions of the RIU3 (remote interface
unit). Each section of this manual is set up to easily guide users through all stages of installation, setup and maintenance.
Starting from unpacking and inspecting the box, this manual will explain all parts and functions of the system to allow users
to get the most out of the RIU3 for all their system monitoring needs.
The PT4 RIU3 is a eld mounted single sensor transmitter/controller. The unit is compatible with a variety of water
quality probes such as dissolved oxygen, temperature and pH. For a full list of compatible probes, see Table1. The
RIU3 is equipped with a large font 8 x 2 backlit display so the user can view the sensor readings .The unit contains two
SPDT 10amp relays to be used for alarm and/or control outputs. The control blocks can be congured as described
on page 19. Probe calibration can also be done via the RIU3 interface as described on page 21.
The RIU3 uses IP67-rated cable glands for the power, data and probe connections, sealing the unit for wet
environments. Although the RIU will function as a standalone controller, multiple units may be daisy chained for a
network connection. This allows the user to collect, manipulate and control all of the data via the PT4 LC Controller
or using the PT4 Sync HMI Software (Windows Based).
Probe Description Manufacturer Parameters Signal Type
Galvanic DO/Temp OxyGuard %Sat, mg/L, DegC mV, ermistor
Galvanic DO OxyGuard %Sat or mg/L mV
Optical DO In-Situ %Sat, mg/L, DegC RS485
pH Sensorex pH 4-20 mA
ORP Sensorex mV 4-20 mA
Salinity OxyGuard ppt 4-20 mA
Dissolved CO2 w/ transmitter OxyGuard mg/L 4-20 mA
Temperature OxyGuard DegC 4-20 mA
Level Switch RHFS Low/High Level Dry Contact
Additional probes with 4-20 mA, 0-5V, or mV outputs may also be compatible with the RIU3. Contact
InWater Technologies for more information.
Table 1: RIU3-compatible probes

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
4
SYSTEM COMPONENTS
System Components
1) RIU LCD Display : 4 x 20 Backlit Alpha Numeric
2) 4-Button Foil Switch
3) PG9 Cable Gland for Probe Input
4) PG9 Cable Glands for Power and Data connections (x2)
5) PG7 Cable Glands for Relay Outputs (x2)
6) Optional Enclosure Mounting Feet (x4)
System Specications
1) Power: 12-24 VDC, 180 mA max
2) Auxiliary power for loop-powered probes: Onboard
isolated 24 VDC loop power supply
3) Input: Inputs are factory-congurable for probes listed
inTable1. Additional probe types are available upon request
4) Outputs: Two SPDT 10 Amp relays – user congurable,
RS-485 MODBUS communications
5) Environmental: IP67 water tight enclosure, sealed cable
glands
6) Dimensions: 125x125x75 mm
1
2
3 4
6
5

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
5
SYSTEM WIRING
1. Ch1 input connector
i. A 2 pin connector for the rst channel for a probe input.
2. Ch2 input connector
i. A 2 pin connector for the second channel for a probe input.
3. Isolated DC output for auxiliary probe power
i. A 2 pin connector used to provide 24 VDC isolated auxiliary probe power.
4. Auxiliary RS485 input connector
i. A 2 pin connector for RS485 probe inputs.
5. Power & RS485 inputs
i. 5 pin connectors. Pins 1 and 2 are used to connect DC power to the RIU3. Pins 3 and 4 are used to connect the Modbus
RS485 signal to the RIU3. Pin 5 is used to connect the shield of the cable to the RIU3 ground. See page 6 for wiring information.
6. Data Tx & Rx LEDs
i. These LEDs indicate Modbus RS485 communications. The Rx LED will blink when a Modbus message is received by the
RIU3 and the Tx LED will blink when a Modbus message is transmitted by the RIU3.
7. Relay output connectors
i. 3 pin connectors used to connect the relay output to an external device. Normally open or normally closed congurations
can be used. See page 6 for wiring information.
8. SPDT relays
i. Single pole, double throw relays rated for up to 24VDC , 10 A.The relay status is controlled by RIU3 control blocks, which can
be congured through the Control menu using the 4-button foil switch. See page 19 for control block conguration information.

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
6
TYPICAL RIU WIRING CONFIGURATIONS
Typical RIU Wiring Congurations
1. Wiring for use with PT4 LC or other SCADA system
Relay Wiring Examples
1. Dry Contact – Normally Open or Normally Closed
2. Live Contact – RIU or External Power
2. Wiring for use with a PC
Warning: If the Data and Power wires are not connected to the appropriate terminals, damage to the RIU3 may occur. This will
void the warranty. Please ensure all connections are correct before powering up the unit.

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
7
TYPICAL PROBE WIRING
Typical Probe Wiring Congurations
1. OxyGuard DO/Temp Probe
2. OxyGuard DO Probe

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
8
TYPICAL PROBE WIRING
Typical Probe Wiring Congurations
3. InSitu RDO Optical DO Probe
4. Sensorex ORP or pH Probe

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
9
TYPICAL PROBE WIRING
Typical Probe Wiring Congurations
5. OxyGuard Temperature Probe
6. Level Switch

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
10
1. LCD Display
i. A 2x8 Backlit LCD display.
2. “Up” Button
i. Scrolls up through menu options or input characters, or in the main menu, toggles between display parameters.
3. “Enter” Button
i. This button is used while in the conguration menu to conrm a selection or user input. See page 11 for more
information about navigating the RIU3 menu.
4. “Return” Button
i. This button can be held for 3 seconds to enter into the RIU3 conguration menu. While in the conguration, this
can be pressed to return to the previous menu page.
5. “Down” Button
i. Scrolls up through menu options or input characters, or in the main menu, toggles between display parameters.
POINT4 RIU
Point4 RIU
INWATER
TECHNOLOGIES
5
1
2
34
4
5
Return button
Down button
1 Backlit LCD Display
2 Up button
3 Enter button
RIU3 FRONT PANEL

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
11
RIU3 OPERATION
The main screen of the RIU3 displays the current values read from the probe.
Using the up and down keys toggles between additional probe values and shows the status of the relays either being on or o.
Warnings conditions are also displayed on the Main screen
Holding down the return arrow for three seconds brings you into the settings menu.
The settings menu allows you congure multiple values and parameters such as alarm conditions, relay control type, probe
calibration, backlight set up and system diagnostics.
The following chapter will discuss the basic operational features and menu structure of the RIU3.
Additional chapters in this manual will explain advanced features such as conguring relay control types, two point calibration,
and troubleshooting.
Main Display
PV Values
Selection Menu
Error Display
<Toggled every 2 sec>
Error Condition
Hold for > 3 sec
Relay Status
Error Types:
ERROR
Low Volt
Highest
Priority
Lowest
Priority
ERROR
High Amp
mV Trim
Required
Selftest
Required
R1 = ON
R2 = OFF
Example
100% Sat
8.9 mg/L
Example
If more than 2 PV
values: displayed 2
per screen
MAIN DISPLAY
[
[
[
[

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
12
SELECT:
External Chs
SELECT:
Calibration
SELECT:
Control
SELECT:
Diags
SELECT:
Setup
SELECT:
Exit
External Chs
Calibration
Control
Diags
Setup
Main Display
SELECTION MENU
PRESS THE RETURN BUTTON
FROM ANY SCREEN
WITHIN THE DASHED LINE
TO REVERT TO THE
MAIN DISPLAY
IF YOU DO NOT TOUCH ANY
KEYS AFTER 60SEC THE UNIT
WILL REVERT TO THE
MAIN DISPLAY
Page 2

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
13
Selection Menu
Example Ext XXX CH:
BPT - Default Value 760
TEMP - Default Value 20
SAL - Default Value 0
Changing the Values
Other EXT Chs displayed
if any
Enter EXT value
Enter EXT value
EXTERNAL CH MENU
SET CH:
760 (CH Value Displayed)
External channels
are values required
by the RIU3 that it
does not produce.
Example: BP is a required
input value for an RIU3
Exit
PRESS THE RETURN BUTTON
FROM ANY SCREEN
WITHIN THE DASHED LINE
TO REVERT TO THE
SELECTION MENU
IF YOU DO NOT TOUCH ANY
KEYS AFTER 60SEC THE UNIT
WILL REVERT TO THE
MAIN DISPLAY
Press the up or down arrow to change the value (0-9)
Press the check to go to the next digit
Press the return key to go to the previous digit.
Pressing the return key from the 1st digit returns to the menu.
XXX CH
####

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
14
PRESS THE RETURN BUTTON
FROM ANY SCREEN
WITHIN THE DASHED LINE
TO REVERT TO THE
SELECTION MENU
CALIBRATION MENU
Calibration Sub Menu:
Calibration
Sub Menu
1 Point Calibration
Procedure
2 Point Calibration
Procedure
mg/L
1 Pt Cal
mg/L
2 Pt Cal
mg/L
Exit
Example of selected Ch displayed
CAL CH:
Oxy (Process Variable)
CAL CH:
Oxy
CAL CH:
Exit
Other Cal Chs displayed
if any
Menu Selection
(Process Variable)
Calibration
Sub Menu

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
15
CONTROL MENU
CB
1: Oxy / mg/L
#1
CB 1
Exit
Control Block channel:
Sensor name toggled every
second with engineering units
In this example: “Oxy” / “mg/L”
Menu Selection
Other Control Blocks
displayed if any
PRESS THE RETURN BUTTON
FROM ANY SCREEN
WITHIN THE BLACK
DASHED LINE
TO REVERT TO THE
SELECTION MENU
Select Control Block:
Control Block
Control Block

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
16
1: Type
Control
1: Type
Control / Alarm
PRESS THE RETURN BUTTON
FROM ANY SCREEN
WITHIN THERED DASHED
LINE TO REVERT TO THE
CONTROL MENUABOVE
CONTROL MENU
Changing the Values
Press the up or down arrow to change the value (0-9)
Press the check to go to the next digit
Press the return key to go to the previous digit.
Pressing the return key twice from the 1st digit returns to the menu.
1: Hi SP
###ay2
1: Ch In
Oxy / mg/L
1: Ch In
Oxy/%Sat
<
1: Relay
Relay 1
<
<
1: Relay
Relay 1
CB 1
High Setpoint
View / change:
High Setpoint
CB 1
Low Setpoint
View / change:
Low Setpoint
CB 1
Delay On
View / change:
Delay On
CB 1 View / change:
CB 1
Action
View / change:
Action
<

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
17
DIAGNOSTICS MENU
[
[
* Refer to Diagnostics Table for troubleshooting - TBD
PRESS THE RETURN BUTTON
FROM ANY SCREEN
TO REVERT TO THE
SELECTION MENU
Ch1: mV Values
Ch2: mV Values
Total Modbus
(Net) messages
Total Modbus
(Net) errors
Keypad
pass/fail Status
Relay
pass/fail Status
Ch 1 mV
pass/fail Status
Ch 2 mV
pass/fail Status
COM 1 & 2
pass/fail Status
I2C BUS
pass/fail Status
EEPROM
pass/fail Status
RTC
pass/fail Status
Input Power
I = ___mA
V = ___V
DIAGS
Exit
Page 9

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
18
SETUP MENU
SETUP
Net ID
SETUP
Backlight
SETUP
Low Voltage
View / change:
Net ID
View / change:
Backlight options
View / change:
Low Voltage
SW REV
RIU0###
SETUP
Exit Menu Selection
PRESS THE RETURN BUTTON
FROM ANY SCREEN
WITHIN THE DASHED LINE
TO REVERT TO THE
SELECTION MENU
Page 10

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
19
The RIU3 control blocks take inputs from the probe parameters and control the state of the relays according to some
user-selected set points. The user can congure the input parameters, control type, set points, delays and output relays
for each control block. The user-selectable parameters are described in more detail below.
User-Selectable Control Block Parameters
1) Type
The Type can be set either to Control or Alarm. In alarm mode, the relay output behaves as described in Figure 1.
In control mode, the relay output behaves as described in Figure 2
Figure 1: Alarm Mode operation
If the process value (PV) is within the user dened high and low
set points the system condition is normal. If the process value (PV)
uctuates out of the alarm bandwidth (above the high set point or
below the low set point) the system will go into alarm.
This is indicated on the bottom left corner of the home screen by
ashing the word “ALARM”. This is also indicated on each individual
channel by the alarm symbol.
A delay time can be added to the setpoint. (E.G. A sh/plant touches
the probe, sending the conditions out of the normal bandwidth,
resulting in false alarm conditions. The delay time allows the condi-
tions to return to within the normal bandwidth.
If the process value (PV) is within the user dened high and low
set points the system condition is normal. If the process value (PV)
uctuates below the low set point the system will go into a control
situation. This turns on (or o depending on normal conditions) a
relay. The relay will remain on until the process value (PV) reaches
the high set point at which point it will switch o.
The process can be reversed so that a relay turns on when the pro-
cess value (PV) uctuates above the high setpoint, depending on
the customers needs.
This is indicated on each individual channel by the orange RLY ON
indicator.
A delay time can be added to the setpoint. (E.G. A sh/plant touches
the probe, sending the conditions out of the normal bandwidth,
resulting in false control conditions. The delay time allows the con-
ditions to return to within the normal bandwidth. A delay can also
be added to the high setpoint which allows the system overdose,
which may be applicable in some cases.
Figure 2: Control Mode operation
CONTROL BLOCK OPERATION

POINT4 RIU3 Remote Monitor/Controller Installation and User’s Guide
20
2) Ch In
This is the input parameter for the control block. The user will have the option to select from all available parameters for
the specic probe being used.
3) Relay
This is the output relay for the control block. The user will have the option to select between Relay 1 and Relay 2.
4) Hi SP
This is the high set point as described in SectionAbove.
5) Lo SP
This is the low set point as described in SectionAbove.
6) Delay On
The delay on denes how long in seconds the control block will be in Alarm or Control status before the relay output is
activated.
7) Delay O
The delay o denes how long in seconds the control block will be out of Alarm or Control status before the relay output
is deactivated.
8) Action
The user will have the option to select between High and Low. When set to low action, the control block will behave as
described on page 19. When in set to high action, the control block will behave inversely to what is described on page 19.