Omega Products ORTX-45 Installation Manual
Table of Contents
Part 1 Introduction
1.1 General 5
1.2 System Features 7
1.3 Instrument Specifications 9
1.4 Performance Specifications 12
Part 2 Mounting
2.1 General Mounting 13
2.2 Wall Mounting 14
2.3 Pipe Mounting 14
2.4 DIN Rail Mounting 16
2.5 Integral Mounting 16
2.6 Panel Mounting 16
Part 3 Electrical Installation
3.1 General 20
3.2 Two-Wire Configuration 20
3.21 Load Drive Capability
22
3.3 115/230 VAC Configuration 23
3.4 115/230 VAC w/ 2 Relays Configuration 25
3.5 Battery-Powered Configuration 27
Part 4 Sensor Connection
4.1 General 31
4.2 ORE-45P Sensor Connection 32
4.3 Combination Electrode Connection 33
4.4 External Temperature Compensators 34
4.5 Long Cable Length Issues 35
Part 5 Operation
5.1 User Interface 38
5.11 Keys
5.12 Display
5.2 Software 41
5.22 Default Menu
5.23 Calibration Menu
5.24 Configuration Menu
5.25 Diagnostics Menu
5.21 Software Navigation
39
39
41
44
45
46
54
Rev. B, 05/02
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Table of Contents (continued)
Part 6 Calibration
6.1 Overview and Methods 59
6.11 Sensor Slope
6.12 Sensor Offset
6.14 1-Point Calibration Explained
6.13 2-Point Calibration Explained
60
60
61
61
6.2 Performing a 2-Point Calibration 62
6.3 Performing a 1-Point Calibration 64
6.4 Temperature Calibration 66
6.5 TC Factor Calibration 67
Part 7 Service and Maintenance
69
7.1 System Checks 71
7.2 Instrument Checks 72
7.3 Display Messages 73
Rev. B, 05/02
ORTX-45
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Table of Contents (continued)
Diagrams and Illustrations
Figure 1-1
Figure 1-2 Specifications - Views 11
Figure 2-1 Multi-Purpose Bracket 15
Figure 2-2 ORTX-45 Mounting Configurations 15
Figure 2-3
Figure 2-4
Figure 2-5 115/230 VAC Panel Mount and Cut-out 19
Figure 3-1 Loop Power Connection 21
Figure 3-2 Line Power Connection 24
Figure 3-3
Figure 3-4
Figure 3-5 Relay Contacts 27
Figure 3-6 DC Battery Board Connection 28
Figure 4-1 Bulkhead Connection 31
Figure 4-2
Figure 4-3
Combination Electrode 33
Figure 4-4 External Temperature Compensators 34
Figure 4-5
Three-Wire RTD Connection 37
Figure 5-1
Figure 5-2 Software Map 43
Figure 5-3 Control Relay Example 49
Figure 5-4
Figure 7-1 ORTX-45 Assembly Diagram 69
Figure 7-2
ORTX-45 Configurations 6
2-Wire Integral Mount Detail 17
2-Wire Panel Mount and Cut-out 17
Line Power w/ Relays Connection 26
Relay Cable Connection 26
Sensor Cable Connections, ORE-45P 32
Sensor Cable Connections,
Junction Box Connection and
User Interface 38
Alarm Relay Example 50
ORTX-45 Assembly, optional 70
Rev. B, 05/02
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Part 1 - Introduction
1.1 General
The Model ORTX-45 ORP monitor/analyzer provides an
extremely versatile measurement system for monitoring
and control of ORP (oxidation/reduction potential, also
known as REDOX) over the range of –1000 mV to +2000
mV. The instrument is offered standard as a looppowered transmitter for 2-wire DC applications. Since this
system configuration operates over only two low-voltage
wires, it is ideal for remote monitoring applications where
line power is either unavailable or prohibitively expensive
to run.
With an optional plug-in card, the instrument may also be
configured for 115/230 VAC operation. This configuration
is ideal when line power is located close to the point of
installation, and only a single isolated 4-20 mA output is
required.
An optional plug-in card is also available that provides
dual relay output, and two 4-20 mA outputs (one for ORP
and one for temperature) to convert the instrument to an
ORP controller. This card must be used with the 115/230
VAC option. This option expands the output capability of
the controller for applications that require relay-setpoint
functionality.
Note:
Rev. B, 05/02
An optional plug-in card is available that converts the
instrument into a robust, view-only, portable measurement system that operates on one 9 VDC battery. In this
configuration, all of the standard features of the basic 2wire transmitter are functional with the exception that the
instrument does not output a 4-20 mA current. Since this
system utilizes the same high performance ORE-45P
sensor as the standard configurations, it is a very robust
portable monitoring system. It can be used on its own, or
it can be used with other permanently installed ORTX-45
continuous monitoring systems to simplify calibration by
using the calibrate-by-reference method.
Due to the high-degree of flexibility of the **TX-45 system
options, it is important to note areas of the operating
manual that detail these optional features. The software
features for the relay output option and battery option only
appear when those modules are connected and the
system has been re-powered.
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Part 1 - Introduction 1.1 General
In all configurations, the ORTX-45 displays mV, sensor
temperature, and output loop current on the secondary
line of the custom display. The instrument may be used
directly with either the high performance Quantum series
of sensors or with standard combination-style electrodes.
The Model ORTX-45 offers maximum mounting flexibility.
A bracket is included with each unit that allows mounting
to walls, pipes, panels, or DIN rail. In addition, the system
is designed to be integral mounted. Integral mounting is
an ideal solution for tight spaces where no mounting exists
except for atop the sensor.
Figure 1-1 illustrates the configuration possibilities for the
ORTX-45 monitor/analyzer system. At any time, options
can be added or removed from the standard unit. The
system software automatically recognizes the options on
power-up and properly enables those new features. This
allows the basic 2-wire module to be stocked as a spare
part for any of the measurement systems.
Rev. B, 05/02
Figure 1-1 ORTX-45 Configurations
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Part 1 - Introduction 1.2 System Features
1.2 System Features
•
Standard main module is designed to be a fully isolated,
loop powered instrument for 2-wire DC applications.
Protected from surge and brownout. Optional integral
power supply card for 115/230 VAC operation, and
optional battery power supply card for portable applications are available.
• Output Hold, Output Simulate, Output Alarm, and
Output Delay Functions. All forced changes in output
condition include bumpless transfer to provide gradual
return to on-line signal levels and to avoid system
control shocks on the main analog output (ORP).
• Optional plug-card provides dual SPDT relay operation.
Software settings for relay control mode include setpoint, deadband, phase, delay, and failsafe. Software
controls automatically appear in menu list when
hardware option card is plugged in and system power
is applied.
•
Selectable HI-LO alarm “band” mode feature on Relay
A. This feature allows the User to select two set points
on the same relay, so that a high and low limit alarm
can be established on one set of contacts.
•
Selectable Output Fail Alarm feature allows system
diagnostic failures to be sent to external monitoring
systems.
• Selectable Probe Timer feature on Relay B allows
connection of probe cleaner hardware or other accessories that require timed periodic relay contacts.
• Large, high contrast, custom Super-Twist display
provides excellent readability even in low light conditions.
The secondary line of display utilizes 5×7 dot matrix
characters for clear display of messages, avoiding
cryptic segmented character messages. Two of four
measured parameters may be on the display simultaneously.
Rev. B, 05/02
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Part 1 - Introduction 1.2 System Features
•
Sensor diagnostics monitor glass breakage, sensor
leaks, and RTD condition. Diagnostic messages
provide a clear description of any problem with no
confusing error codes to look up. Messages are also
included for diagnosing calibration problems.
• Flexible two-point and sample calibration methods.
To provide high accuracy, all calibration methods include stability monitors that check temperature and main
parameter stability before accepting data.
• Selectable Pt1000 or Pt100 temperature inputs.
Systems can also be hard-configured for three-wire
elements. Temperature element can be user calibrated.
• Security lock feature to prevent unauthorized tampering
with instrument settings. All settings can be viewed while
locked, but they cannot be changed.
High reliability, microprocessor based system with
•
non-volatile memory back-up that utilizes no batteries.
Low mass, surface mount PCB construction containing
no user adjustment potentiometers. All factory calibrations stored in non-volatile EEPROM.
Rev. B, 05/02
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Part 1 - Introduction 1.3 Instrument Specifications
1.3 Instrument Specifications, ORTX-45 (common to all variations)
Enclosure
NEMA 4X, IP66, polycarbonate, stainless steel hardware,
weatherproof and corrosion resistant,
HWD: 4.4" (112 mm) × 4.4" (112 mm) × 3.5" (89 mm)
Mounting Options Wall, panel, pipe, DIN rail, or integral-sensor (DC only)
Conduit Openings
Standard: 2 - PG-9 openings, 1 - 1" NPT center opening,
cordgrips and plug included.
Relay option: 3 - PG-11 openings, plugs included
Weight
DC transmitter configuration: 1 lb. (0.45 kg)
Line-powered unit: 1.5 lb. (0.68 kg)
Display
Large, high-contrast, Super-Twist (STN) LCD;
4-digit main display with sign, 0.75" (19.1 mm) seven-
segment characters;
12-digit secondary display, 0.3" (7.6 mm) 5×7 dot
matrix characters
Keypad 4-key membrane type with tactile feedback, polycar-
bonate with UV coating, integral EMI/static shield and
conductively coated window
Ambient Temperature Service, -20 to 60 °C (-4 to 140 ºF)
Storage, -30 to 70 °C (-22 to 158 ºF)
Ambient Humidity 0 to 95%, non-condensing
Location
EMI/RFI Influence
Designed for hazardous and non-hazardous areas
Designed to EN 61326-1
Output Isolation 600 V galvanic isolation
Filter Adjustable 0-9.9 minutes additional damping to 90%
step input
Temperature Input Selectable Pt1000 or Pt100 RTD with automatic
compensation
Rev. B, 05/02
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Part 1 - Introduction 1.3 Instrument Specifications
Instrument Specifications, ORTX-45 (NOT common to all variations)
»Basic 2-Wire Transmitter:
Power
DC Cable Max. Length
DC Cable Type
Insertion Loss 15.5 VDC
16-35 VDC (2-wire device)
3000 feet (914 meters)
Belden twisted-pair, shielded
»115/230 VAC Option:
Power
4 kV line isolation
Fuse
115/230 VAC ± 10%, 50/60 Hz
250 mA slow-blo on hot line, auto-reset secondary
»115/230 VAC Option + Dual Relays Option:
Power
Fuse
Relays Electromechanical:
Dual SPDT, 6 amp @ 250 VAC, 5 amp @ 24 VDC contacts.
Dual SPST (N.O.) 0.06-2.0 Amp @12-280 VAC, RMS
Dual SPST (N.O.) 3 Amp @ 60 VDC
Software selection for setpoint, phase, delay, deadband,
Analog Outputs
115/230 VAC ± 10%, 50/60 Hz
250 mA slow-blo on hot line, auto-reset secondary
Solid State (AC):
Solid State (DC):
hi-lo alarm, and failsafe. A-B indicators on main LCD.
Dual 4-20 mA current loops, one for main parameter and
one for temperature. Max load 500 Ohms on main and 500
Ohms on temperature.
»Battery Option:
Power
Auto-OFF Time
Low Battery Indication
Battery Life Normal Use (2-4 hours per week), 4-6 months
Continuous operation, 10-14 days
Rev. B, 05/02
Generic 9 VDC alkaline battery
2 hours after no keypress
6.75 VDC
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Part 1 - Introduction 1.3 Instrument Specifications
Inches (mm)
Rev. B, 05/02
Figure 1-2 Specifications - Views
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Part 1 - Introduction 1.4 Performance Specifications
1.4 Performance Specifications, ORTX-45
(common to all variations)
Displayed Parameters
Main input, -1000 to +2000 mV
Loop current, 4.00 to 20.00 mA
Sensor temperature, -10.0 to 110.0 °C (14 to 230 ºF)
Main Parameter Range -1000 mV to +2000 mV
Input Impedance
Repeatability
Sensitivity
0.1% of span or better
0.05% of span
Greater than 10
13
Ohms
Non-linearity 0.1% of span
Stability 0.05% of span per 24 hours, non-cumulative
Temperature Drift Span or zero, 0.02% of span/°C
Warm-up Time
Instrument Response Time
7 seconds to rated performance
6 seconds to 90% of step input at lowest setting
Max. Sensor-Instrument
Distance
3000 ft. (914 meters) w/ preamp,
30 ft. (9.1 meters) w/o preamp
Sensor Types Omega ORP w/ preamp, 5 wire input (Model ORE-45P),
or combination style ORP electrode w/ TC - 2 wire input
Rev. B, 05/02
ORTX-45
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Part 2 - Mounting
2.1 General
All **TX-45 Series Instruments offer maximum mounting
flexibility. A bracket is included with each unit that allows
mounting to walls, pipes and DIN rail. In all cases, choose
a location that is readily accessible for calibrations. Also
consider that it may be necessary to utilize a location
where solutions can be used during the calibration process.
To take full advantage of the high contrast display, mount
the instrument in a location where the display can be
viewed from various angles and long distances.
The two-wire version of the instrument is ideal for remote
mounting applications where line power in unavailable and
expensive to run, or in locations where only low-voltage
wiring is allowed. The 115/230 VAC powered version of
the instrument is designed to be used where line power is
already available. The portable version can be used for
survey measurements or for calibration checks of a larger
number of permanently installed units.
Locate the instrument in close proximity to the point of
sensor installation - this will allow easy access during
calibration. Sensor-to-instrument distances of over 3000
feet are possible with the high performance Omega
ORE-45P sensor, but this is not generally recommended
since it may hamper access to sensor during calibration.
The sensor-to-instrument distance for combination style
electrodes must not exceed 30 feet.
Rev. B, 05/02
For long distance installations (50 feet or more), standard
sensor cable (10 feet) in combination with a junction box
and interconnect cable is recommended. Sensors with
extremely long cables can be cumbersome to remove for
cleaning or service. It is much more convenient to remove
or replace a sensor with only 10 feet of cable when a
junction box is used. It is also far more economical.
In general, the location should be relatively dry and clean
with little or no vibration, and the ambient temperature
must be within the operating temperature limits of the
instrument. Avoid areas where the instrument may be
frequently splashed with corrosive process materials.
Particularly in the integral mount version, excessive vibration
or heat from the process line may degrade the reliability of
the system.
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Part 2 - Mounting 2.1 General
Note: Never leave the instrument case open for ex-
tended periods of time. This can allow corrosive
materials to attack the circuitry of the system.
Due to the high flexibility of the instrument design, some of
the mounting features change based on the option boards
that may be installed. For example, the panel mounting
implementation is different for the 115/230 VAC controller
because the rear of the enclosure must be used. A
special flange must be used to seal the entire enclosure
to the panel. In the 2-wire transmitter configuration, just
the front of the enclosure can be mounted. In addition, the
115/230 VAC must not be integral mounted. Carefully
study all mounting configurations.
2.2 Wall
Mounting
2.3 Pipe
Mounting
Any of the instrument configurations may be wall mounted
(see Figures 2-1 and 2-2 for details). The multi-purpose
bracket is attached to the rear of the enclosure using the
four provided pan head screws. The protrusion side of the
multi-purpose bracket should face into the depression on
the rear of the instrument enclosure. The instrument is
then attached to the wall using the four outer mounting
holes in the bracket.
For the pipe mounting configuration, the multipurpose
bracket is attached to the rear of the enclosure with the
four provided screws. The protrusion on the bracket must
face outward. The bracket may be rotated for proper
alignment prior to mounting (see Figures 2-1 and 2-2 for
details).
Once the bracket is fastened to the rear of the enclosure, the
provided pipe clamp must be completely opened and slipped
through the two slots in the multi-purpose mounting bracket.
The clamp is then looped around the pipe, re-attached, and
tightened.
Rev. B, 05/02
ORTX-45
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Part 2 - Mounting 2.3 Pipe Mounting
Inches (mm)
Figure 2-1 Multi-Purpose Bracket
Rev. B, 05/02
Figure 2-2 ORTX-45 Mounting Configurations
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Part 2 - Mounting 2.4 DIN Rail Mounting
2.4 DIN Rail
Mounting
2.5 Integral
Mounting
For the DIN rail mounting configuration, the multipurpose
bracket is attached to the rear of the enclosure with the
four provided screws. The protrusion on the bracket must
face outward. The bracket may be rotated for proper
alignment prior to mounting (see Figures 2-1 and 2-2 for
details).
Once the bracket is fastened to the rear of the enclosure,
the unit must be slid onto the DIN rail. It does not lock into
place. Therefore, if the unit is removed for service or
replacement, it must be slid off of the DIN rail, or the front
half of the controller can be removed and replaced since
all of the electronics in the 2-wire configuration reside in
the front half.
Only the 2-wire configuration may be mounted directly on
the back of the Model ORE-45P sensor (see Figures 2-2
and 2-3 for details).
Note: Do not attempt to integral mount the 115/230
VAC configuration. This configuration is not
designed to be mounted directly to the sensor.
2.6 Panel
Mounting
Rev. B, 05/02
For an integral mount connection, the sensor cable must
be cut substantially to fit into the instrument enclosure.
Cut and strip the sensor cable as shown in Figure 2-3.
Screw the sensor fully into the enclosure base before
completing wiring connections.
The instrument may also be panel mounted in two different
ways:
In the 2-wire configuration, the front half of the enclosure
may be separated and mounted by itself, as shown in
Figure 2-4. Note that the rear of the instrument enclosure
is not utilized in this mounting scheme. Holes must be
drilled at the perimeter of the panel cut-out that allow the
enclosure screws to pass through and be retained on the
back side. User-supplied #8-32 nuts are used to fasten
the instrument from the back. The FIP instrument gasket
remains intact during this mount to seal to the panel.
ORTX-45
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Part 2 - Mounting 2.6 Panel Mounting
Inches (mm)
Inches (mm)
Figure 2-3 2-Wire Integral Mount Detail
Figure 2-4 2-Wire Panel Mount and Cut-out
Rev. B, 05/02
ORTX-45
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Part 2 - Mounting 2.6 Panel Mounting
In the full enclosure configuration (necessary with the
115/230 VAC card option), the entire enclosure is panelmounted using a special optional sealing flange.
The sealing flange must first be attached to the enclosure.
Remove the enclosure hinge by bending one of the hinge
legs inward toward the center of the enclosure with a
pair of needle nose pliers. Once it is loose, slide the
hinge leg out the opposite side. When completed, remove
the two hinge retainer screws and hinge plate assembly.
Fasten the flange to the rear half of the enclosure using
the four hex retainers. The flange gasket material must
face towards the rear of the enclosure. Re-install the
hinge and hinge plate assembly onto the flange using the
two hinge screws. Re-attach hinge pins to the front half of
the enclosure by bending the hinge pin leg with a pair of
needle nose pliers. The flange is now installed. Seal up
the finished enclosure by tightening down the four enclosure
screws prior to mounting.
A different cut-out is required for this configuration, as
shown in Figure 2-5. Once the cut-out has been completed,
insert the flanged enclosure through the cut-out. The
mounting bracket is then attached to the rear of the enclosure
as shown. Install the four tension screws through the four
mounting holes in the bracket, and place the no-slip
rubber boots on each screw. Tighten all screws down to
seal the enclosure flange onto the panel.
Rev. B, 05/02
ORTX-45
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Part 2 - Mounting 2.6 Panel Mounting
Inches (mm)
Rev. B, 05/02
Figure 2-5 115/230 VAC Panel Mount and Cut-out
ORTX-45
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Part 3 - Electrical Installation
3.1 General
The instrument may be powered in several ways, depending on the option features installed. The 2-wire version is
a 16-35 VDC powered transmitter. The integral 115/230
VAC version and relay version require line power. Please
verify the type of unit before connecting any power.
WARNING: Do not connect AC line power to the 2-
wire module. Severe damage will result.
Important Notes:
1. Use wiring practices that conform to all national, state
and local electrical codes. For proper safety as well as
stable measuring performance, it is important that the
earth ground connection be made to a solid ground
point from TB1. The power supply contains a single
¼-Amp slo-blo fuse on the H Terminal.
2. Do NOT run sensor cables or instrument 4-20 mA
output wiring in the same conduit that contains AC
power wiring. AC power wiring should be run in a
dedicated conduit to prevent electrical noise from
coupling with the instrumentation signals.
3.2 Two-Wire
Configuration
Rev. B, 05/02
In the two-wire configuration, a separate DC power supply
must be used to power the instrument. The exact connection
of this power supply is dependent on the control system
into which the instrument will connect. See Figure 3-1 for
further details. Any general twisted pair shielded cable
can be used for connection of the instrument to the power
supply. Route signal cable away from AC power lines,
adjustable frequency drives, motors, or other noisy electrical
signal lines. Do not run sensor or signal cables in conduit
that contains AC power lines or motor leads.
ORTX-45
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Part 3 - Electrical Installation 3.2 Two-Wire Configuration
ORE-45P SENSOR
Notes: 1. Voltage between Terminals 9 and 10 MUST be between 16 and 35 VDC.
2. Earth ground into Terminal 12 is HIGHLY recommended. This connection can greatly
improve stability in electrically noisy environments.
Figure 3-1 Loop Power Connection, Omega ORE-45P Sensor and ORTX-45 Transmitter
Rev. B, 05/02
ORTX-45
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Part 2 - Installation 3.2 Electrical-2 wire Version Part 3 - Electrical Installation 3.21 Load Drive Capability
3.21 Load Drive
Capability
The amount of resistance that the analog output can drive
in the 115/230 VAC version is fixed. However, in the twowire configuration, the load-drive level is dependant on the
DC supply voltage provided to the controller.
The two-wire instrument can operate on a power supply
voltage of between 16 and 35 VDC. The available load
drive capability can be calculated by applying the formula
V/I=R, where V=load drive voltage, I=maximum loop
current (in Amperes), and R=maximum resistance load (in
Ohms).
To find the load drive voltage of the two-wire ORTX-45,
subtract 16 VDC from the actual power supply voltage
being used (the 16 VDC represents insertion loss). For
example, if a 24 VDC power supply is being used, the load
drive voltage is 8 VDC.
The maximum loop current of the two-wire ORTX-45 is
always 20.00 mA, or .02 A. Therefore,
(Power Supply Voltage - 16)
R
=
.02
MAX
Rev. B, 05/02
For example, if the power supply voltage is 24 VDC, first
subtract 16 VDC, then divide the remainder by .02.
8/.02 = 400; therefore, a 400 Ohm maximum load can be
inserted into the loop with a 24 VDC power supply.
Similarly, the following values can be calculated:
Power Supply Voltage
Total Load (Ohms)
(VDC)
16.0 0
20.0 200
24.0 400
30.0 700
35.0 950
ORTX-45
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Part 2 - Installation 3.3 Electrical—115/230 vac Version Part 3 - Electrical Installation 3.3 115/230 VAC Configuration
3.3 115/230 VAC
Configuration
In the 115/230 VAC configuration, a DC power supply is
mounted into the inside rear of the enclosure. The power
supply must be ordered with the proper operating voltage.
Verify that the unit requires either 115 VAC or 230 VAC
before installing. Also verify that power is fully disconnected
before attempting to wire.
Connect HOT, NEUTRAL, and GROUND to the matching
designations on terminal strip TB1.
If the unit was ordered with the integral power supply
installed, a connection will also be present from terminal
strip
to the ORTX-45 module. If the power supply
TB2
was ordered separately and installed later, this last
connection at TB2 must be made at this time as shown in
Figure 3-2.
The analog output from the system is present at terminal
TB1. The loop-load limitation in this configuration is 500
Ohms maximum. If the analog output will not be connected
to other instruments, these two terminals must remain
shorted for proper operation.
Note: If not using the 4-20 mA output, a wire short
must exist between terminals (+) and (-) for
proper operation.
Rev. B, 05/02
ORTX-45
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Part 2 - Installation 2.2 Electrical—115/230 VAC Version Part 2 - Installation and Operation 2.3 Electrical
Part 3 - Electrical Installation 3.3 115/230 VAC Configuration
WARNING
Disconnect line power voltage BEFORE connecting
line power wires to Terminal TB1 of the power supply.
The power supply accepts only standard three-wire
single phase power. The power supply is configured
for either 115 VAC or 230 VAC operation at the factory at
time of order, and the power supply is labeled as
such. Do NOT connect voltages other than the labeled
requirement to the input.
Rev. B, 05/02
Figure 3-2 Line Power Connection
The power strip,
, allows up to 14 AWG wire. A wire
TB1
gauge of 16 AWG is recommended to allow for an easy
pass-through into the PG-9 ports when wiring.
ORTX-45
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