Emerson Rosemount 702 User manual

Quick Start Guide
00825-0200-4702, Rev GE
August 2018
Rosemount™ 702 Wireless Discrete
Transmitter

Wireless considerations
Power up sequence
The Wireless Gateway should be installed and functioning properly before any wireless field devices are powered. Install the Black
Power Module, SmartPower™ Solutions model number 701PBKKF (part number 00753-9220-0001) into the Rosemount 702
Transmitter to power the device. Wireless devices should be powered up in order of proximity from the Gateway, beginning with
the closest device, then working outward from the Gateway. This results in a simpler and faster network installation. Enable Active
Advertising on the Gateway to ensure new devices are able to join the network faster. For more information see the Emerson™
Wireless 1420 Gateway Reference Manual.
Antenna position
The antenna should be positioned vertically, either straight up or straight down, and it should be approximately 3 ft. (1 m) from any
large structure, building, or conductive surface to allow for clear communication to other devices.
Figure 2: Antenna Position
Conduit entry
Upon installation, ensure each conduit entry is either sealed with a conduit plug using approved thread sealant, or has an installed
conduit fitting or cable gland with appropriate threaded sealant. Note the conduit entries on the Rosemount 702 Transmitter are
threaded ½–14 NPT.
Figure 3: Conduit Entry
$$
A. Conduit entry
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Field Communicator connections
The power module needs to be installed before the Field Communicator can interface with the transmitter. This transmitter uses
the Black Power Module; Order model number 701PBKKF or part number 00753-9220-0001.
Figure 4: Connection Diagram
COMM
P/N00753-9200-0020
1
2
3
4
CH1 +
CMN
CH2 +
CMN
CH Input Mode:
Dry Contact Only
CH Output Mode:
26VDC Max
100mA Max
The transmitter and all other wireless devices should not be set up until after the Wireless Gateway has been installed and is
functioning properly.
Physical installation
The Rosemount 701 Transmitter can be installed in one of two configurations:
■Direct mount, where the switch is connected directly to the Rosemount 702 Transmitter housing’s conduit entry.
■Remote mount, where the switch is mounted separate from the Rosemount 702 Transmitter housing, then connected to the
Rosemount 702 Transmitter via conduit.
Select the installation sequence that corresponds to the mounting configuration.
Direct mount
Note
Direct mount installation should not be employed when using tubing and connectors such as Swagelok® fittings.
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Quick Start Guide 3

Figure 5: Direct Mount
A. Rosemount 702 Transmitter
B. Float switch
1. Install the switch according to standard installation practices making sure to use thread sealant on all connections.
2. Attach the Rosemount 702 Transmitter housing to the switch using the threaded conduit entry.
3. Attach the switch wiring to the terminals as indicated on the wiring diagram (see Reference information: wiring switch inputs,
output circuits, and leak sensors on page 0 ).
4. Connect the Black Power Module.
Note
Wireless devices should be powered up in order of proximity from the Smart Wireless Gateway, beginning with the closest
device to the Gateway. This will result in a simpler and faster network installation.
5. Close the housing cover and tighten to safety specification. Always ensure a proper seal so the metal touches metal, but do not
over tighten.
6. Position antenna vertically, either straight up or straight down. The antenna should be approximately 3 ft. (0.91 m) from any
large structures or buildings, to allow clear communication to other devices.
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Remote mount
Figure 6: Remote Mount
A. Rosemount 702 Transmitter
B. Float switch
1. Install the switch according to standard installation practices making sure to use thread sealant on all connections.
2. Run wiring (and conduit if necessary) from the switch to the Rosemount 702 Transmitter.
3. Pull the wiring through the threaded conduit entry of the Rosemount 702 Transmitter.
4. Attach the switch wiring to the terminals as indicated on the wiring diagram (see Reference information: wiring switch inputs,
output circuits, and leak sensors on page 0 ).
5. Connect the black power module.
Note
Wireless devices should be powered up in order of proximity from the Smart Wireless Gateway, beginning with the closest
device to the gateway. This will result in a simpler and faster network installation.
6. Close the housing cover and tighten to safety specification. Always ensure a proper seal so the metal touches metal, but do not
over tighten.
7. Position antenna vertically, either straight up or straight down. The antenna should be approximately 3 ft. (0.91 m) from any
large structures or buildings, to allow clear communication to other devices.
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Quick Start Guide 5

High gain, remote antenna (optional)
The high gain, remote antenna options provide flexibility for mounting the device based on wireless connectivity, lightning
protection, and current work practices.
Figure 7: Rosemount 702 Transmitter with High Gain, Remote Antenna
Install the high gain, remote antenna (WN option)
Find a location where the remote antenna has optimal wireless performance. Ideally this will be 15–25 ft. (4.6–7.6 m) above the
ground or 6 ft. (2 m) above obstructions or major infrastructure.
WARNING
When installing remote mount antennas for the transmitter, always use established safety procedures to avoid falling or
contact with high-power electrical lines.
Install remote antenna components for the transmitter in compliance with local and national electrical codes and use best
practices for lightning protection.
Before installing, consult with the local area electrical inspector, electrical officer, and work area supervisor.
The transmitter remote antenna option is specifically engineered to provide installation flexibility while optimizing wireless
performance and local spectrum approvals. To maintain wireless performance and avoid non-compliance with spectrum
regulations, do not change the length of cable or the antenna type.
If the supplied remote mount antenna kit is not installed per these instructions, Emerson is not responsible for wireless
performance or non-compliance with spectrum regulations.
1. Mount the antenna on a 1.5 to 2-in. pipe mast using the supplied mounting equipment.
2. Connect the lightning arrestor directly to the top of the Rosemount 701 Transmitter.
3. Install the grounding lug, lock washer, and nut on top of lightning arrestor.
4. Connect the antenna to the lightning arrestor using the supplied LMR-400 coaxial cable ensuring the drip loop is not closer than
1 ft. (0.3 m) from the lightning arrestor.
5. Use the coaxial sealant to seal each connection between the wireless field device, lightning arrestor, cable, and antenna.
Note
The remote mount antenna kit includes coaxial sealant for weatherproofing the cable connections for the lightning arrestor,
antenna, and Rosemount 702 Transmitter. Coaxial sealant must be applied to guarantee performance of the wireless field
network. See Figure 8 on page 7 for details on how to apply coaxial sealant.
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Figure 8: Applying Coaxial Sealant to Cable Connections
6. Ensure the mounting mast and lightning arrestor are grounded according to local/national electrical code.
Any spare lengths of coaxial cable should be placed in 12-in. (0.3 m) coils.
Device network configuration
In order to communicate with the Smart Wireless Gateway, and ultimately the host system, the transmitter must be configured to
communicate with the wireless network. This step is the wireless equivalent of connecting wires from a transmitter to the
information system. Using a Field Communicator or AMS Wireless Configurator, enter the Network ID and Join Key so they match
the Network ID and Join Key of the Gateway and other devices in the network. If the Network ID and Join Key do not match that of
the Gateway, the Rosemount 702 Transmitter will not communicate with the network. The Network ID and Join Key may be
obtained from the Smart Wireless Gateway on the Setup Network Settings page on the web interface, shown in Figure 9 on page
7.
Figure 9: Gateway Network Settings
AMS Wireless Configurator
1. Right click on the Rosemount 702 Transmitter.
2. Select Configure.
3. When the menu opens, select Join Device to Network.
4. Follow the method to enter the Network ID and Join Key.
Field Communicator
The Network ID and Join Key may be changed in the wireless device by using the following Fast Key sequence. Set both Network ID
and Join Key.
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Quick Start Guide 7

Function Fast Key sequence Menu items
Wireless setup 2,2,1 Network ID, Join Device to Network
Verify operation
There are four methods available to verify operation:
■Using the optional local display (LCD)
■Using the Field Communicator
■Using the Wireless Gateway’s integrated web interface
■Using AMS Suite Wireless Configurator
If the device was configured with the Network ID and Join Key, and sufficient time has passed, the transmitter will be connected to
the network.
Local display
Start-up sequence
When the Rosemount 702 Transmitter is first powered up, the LCD display will display a sequence of screens: All Segments On,
Device Identification, Device Tag, and then the user chosen variables of the periodic display.
During steady state operation, the LCD display gives a periodic display of user chosen variables at the configured wireless update
rate. These variables can be selected from a list of six:
■Channel 1 State
■Channel 1 Count
■Channel 2 State
■Channel 2 Count
■Electronics Temperature
■Supply Voltage
Refer to the Rosemount 702 Reference Manual for error codes and other LCD display messages. The chevron-shaped status bar at
the top of the screen indicates the progress of the network join process. When the status bar is filled, the device is successfully
connected to the wireless network.
Searching for network Joining network Connected with limited
bandwidth
Connected
N E T w K
S R C H N G
n e t w k
N E G O T
n e t w k
L I M -O P
n e t w k
O K
Field Communicator
For HART® Wireless transmitter communication, a Rosemount 702 Transmitter DD is required.To obtain the latest DD, visit the
Emerson Easy Upgrade site at: Emerson.com/Device-Install-Kits.
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Function Key sequence Menu items
Communications 3, 3 Join Status, Wireless Mode, Join Mode,
Number of Available Neighbors, Number
of Advertisements Heard, Number of Join
Attempts
Smart Wireless Gateway
In the Gateway’s integrated web server, navigate to the Explorer page. This page shows whether the device has joined the network
and is communicating properly.
Note
It may take several minutes for the device to join the network.
Note
If the device joins the network and immediately has an alarm present, it is likely caused by the sensor configuration. Check the
sensor wiring (see Figure 13 on page 11) and the sensor configuration (see Table 6 on page 22).
Figure 10: Wireless Gateway Explorer Page
AMS Wireless Configurator
When the device has joined the network, it will appear in AMS Wireless Configurator as illustrated below.
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Quick Start Guide 9

Figure 11: AMS Wireless Configurator, Device Explorer Screen
Troubleshooting
If the device is not joined to the network after power up, verify the correct configuration of the Network ID and Join Key, and that
Active Advertising has been enabled on the Smart Wireless Gateway. The Network ID and Join Key in the device must match the
Network ID and Join Key of the Gateway.
1. From the Gateway's integrated web interface, select Setup Network Settings to obtain the Network ID and Join Key (see Figure
12 on page 10).
Figure 12: Gateway Network Settings
2. To change the Network ID and Join Key in the wireless device, use a Field Communicator and enter the following Fast Key
sequence.
Function Fast Key sequence Menu items
Wireless 2, 1, 1 Join Device to Network
3. Follow the on screen prompts.
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Reference information: wiring switch inputs, output
circuits, and leak sensors
Dry contact switch inputs
The Rosemount 702 Transmitter has a pair of screw terminals for each of two channels, and a pair of communication terminals.
These terminals are labeled as follows:
CH1+: Channel one positive
CMN: Common
CH2+: Channel two positive
CMN: Common
COMM: Communication
Figure 13: Rosemount 702 Transmitter Terminal
Wireless output specifications
Dual input
The Rosemount 702 Transmitter will accept the input from one or two single pole single throw switches on inputs CH1 and CH2.
The wireless output of the transmitter will be both a primary variable (PV) and a secondary variable (SV). The PV is determined by
the CH1 input. The SV is determined by the CH2 input. A closed switch drives a TRUE output. An Open switch drives a FALSE output.
Note
Any dry contact input may optionally be inverted by the device, so change the discrete logic state. This is useful, for instance, if a
normally open switch is used to replace a normally closed switch.
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Quick Start Guide 11

Figure 14: Single and Dual Input
A. Single Input
B. Dual Input
Table 1: Single or Dual Input
Switch input Wireless output Switch input Wireless output
CH1 PV CH2 SV
Closed TRUE (1.0) Closed TRUE (1.0)
Open FALSE (0.0) Open FALSE (0.0)
Dual input, limit contact logic
When configured for Limit Contact Logic, the Rosemount 702 Transmitter will accept the input from two single pole single throw
switch on inputs CH1 and CH2, and will use limit contact logic for the determination of the wireless outputs.
Figure 15: Dual Input, Limit Contacts
A. TRUE
B. FALSE
Table 2: Dual Input, Limit Contact Logic
Switch input Wireless output
CH1 CH2 PV SV
Open Open TRAVEL (0.5) TRAVEL (0.5)
Open Closed FALSE (0.0) FALSE (0.0)
Closed Open TRUE (1.0) TRUE (1.0)
Closed Closed FAULT(NaN) FAULT(NaN)
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Dual input, opposing contact logic
When configured for Opposing Contact Logic, the Rosemount 702 Transmitter will accept the input from a double pole single
throw switch on inputs CH1 and CH2, and will use opposing contact logic for the determination of the wireless outputs.
Figure 16: Dual Input, Opposing Contact
A. TRUE
B. FALSE
Table 3: Dual input, Opposing Contact Logic
Switch inputs Wireless outputs
CH1 CH2 PV SV
Open Open FAULT(NaN) FAULT(NaN)
Open Closed FALSE (0.0) FALSE (0.0)
Closed Open TRUE (1.0) TRUE (1.0)
Closed Closed FAULT(NaN) FAULT(NaN)
Momentary discrete inputs, measurement option code 32 and 42
The Rosemount 702 Transmitter is capable of detecting momentary discrete inputs of 10 milliseconds or more in duration,
regardless of the wireless update rate. At each wireless update, the device reports current discrete input state along with an
accumulating count of close-open cycles for each input channel.
Figure 17: Momentary Inputs and Accumulating Count
A. Input Switch State
B. Closed
C. Open
D. State
E. Count
F. Wireless Updates
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Quick Start Guide 13

Figure 18: Reporting of Current Discrete State and Count in AMS Device Manager
A. Current State
B. Count
Setting variable reporting
The Rosemount 702 Transmitter has two choices for variable reporting: Classic - Discrete State Only, or Enhanced – Discrete State
and Count.
1. In AMS Device Manager, select Configure > Manual Setup > HART.
2. Set Variable Reporting as desired.
Option Description
Classic - Discrete State Only The Rosemount 702 Transmitter will report variables exactly like the previous version of
the device (measurement option code 22).
Enhanced – Discrete State with
Count
The Rosemount 702 Transmitter will provide both current state of the discrete channels,
and a count of the discrete state change cycles.
Table 4 on page 14 shows the variable mapping for both cases.
Table 4: Variable Mapping
Variable reporting PV SV TV QV
Classic – Discrete State
Only
CH1 State CH2 State Electronics
temperature
Supply voltage
Enhanced – Discrete
State with Count
CH1 State CH2 State CH1 Count CH2 Count
Discrete output circuits, measurement option code 42
The Rosemount 702 Transmitter has two channels that can each be configured for discrete input or output. Inputs must be dry
contact switch inputs and these were described in a preceding section of this document. Outputs are a simple switch closure to
activate an output circuit. The Rosemount 702 Transmitter output does not provide any voltage or current, the output circuit must
have power of its own. The Rosemount 702 Transmitter output has maximum switch capacity per channel of 26 volts DC and 100
milliamps.
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14 Rosemount 702 Wireless Discrete Transmitter

Note
It is very important that the polarity of the output circuit is as shown in the wiring diagrams, with the positive (+) side of the circuit
wired to the + terminal of each channel, and the negative (-) side of the circuit wired to the CMN terminal. If the output circuit is
wired backwards it will remain active (switch closed) regardless of the state of the output channel.
Discrete output switch functionality
The discrete output of the Rosemount 702 Transmitter is driven by the host control system, through the Smart Wireless Gateway,
and out to the Rosemount 702 Transmitter. The time required for this wireless communication from the Gateway to the
Rosemount 702 Transmitter is dependent on many factors, including the size and topology of the network and the total amount of
downstream traffic on the wireless network. For a network that is constructed to our best practices, typical delays in
communication of a discrete output from the Gateway to the Rosemount 702 Transmitter are 15 seconds or less. Remember that
this delay is only part of the latency that well be observed in a control loop.
Note
The output switch functionality of the Rosemount 702 Transmitter requires that the network is managed by a version 4 Smart
Wireless Gateway, with v4.3 or greater firmware installed.
Figure 19: Output Circuit Wiring
A. LOAD
B. OUTPUT
Figure 20: Possible Configurations for Both Channel 1 and Channel 2
A. INPUT
B. LOAD
C. OUTPUT
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Quick Start Guide 15

Special considerations for dual output circuits
If both channels are connected to output circuits, it is very important that the CMN terminal of each circuit be at the same voltage.
Employing a common ground for both output circuits is one way to ensure that both circuits have CMN terminals at the same
voltage.
Figure 21: Dual Output Circuits with a Common Ground
A. LOAD
B. OUTPUT
If two output circuits are connected to a single Rosemount 702 Transmitter with a single power supply, both CH + and CMN
terminals must be connected to each output circuit. The negative power supply wires must be at the same voltage and connected
to both CMN terminals.
Figure 22: Dual Output Circuits with One Power Supply
A. LOAD
B. OUTPUT
Switching greater currents or voltages
It is important to note that the maximum output switching capacity is 26 volts DC and 100 milliamps. If a greater voltage or current
is to be switched, an interposing relay circuit can be used. Figure 23 on page 17 shows an example of a circuit to switch higher
currents or voltages.
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Figure 23: Wiring an Interposing Relay to Switch Greater Currents or Voltages
A. Power Supply
B. LOAD
Plunger arrival detection
Terminal block connections
The plunger arrival detection configuration for measurement option code 52 is intended for use with the ETC Cyclops Plunger
Arrival Sensor.
Figure 24: Plunger Arrival Terminal Diagram
The wiring connections to the ETC Cyclops sensor are made according to Figure 5-13, where 1 connects to 3, 2 connects to 2, and 3
connects to 1 between the transmitter and the sensor.
Figure 25: Wiring Configuration
Plunger Arrival Sensor ETC Cyclops Sensor
1
2
3
3
2
1
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Quick Start Guide 17

Rosemount 702 Transmitter ETC Cyclops Sensor
1. PWR OUT
2. SIG
3. COM
1. COM
2. SIG
3. PWR
For mounting and maintenance of the ETC Cyclops Sensor, refer to the ETC Cyclops Plunger Arrival Sensor Manual.
Latching feature
The Rosemount 702 has a latching feature that, when enabled, allows detection of momentary state changes to be held for a
configurable latch period. The latching feature can be configured to detect either high or low state changes. By default, the Plunger
state (channel 1) is enabled to latch high state changes for a period of one minute.
The following are some examples to demonstrate how the latching time works.
Note
Hold time is set to four seconds for illustration in the following examples.
Short events (less than latch hold time) of the measured value will be latched to the reported value for the duration of latch hold
time.
Figure 26: Latch Time Short Events
A
B
A. Measured
B. Reported
The start of the latch hold timer begins when the measured signal first transitions to active state.
Figure 27: Latch Hold Time Start
A
B
A. Measured
B. Reported
The latch only applies to transitions into the active state. As soon as the reported value is no longer latched,the devices is armed for
the next event.
Figure 28: Latch Applies to Transitions to Active State
A
B
A. Measured
B. Reported
If the measured value goes inactive and active again before the initial latch hold timer experies, the latch hold timer will restart
from the beginning of the most recent event.
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Figure 29: Latch Hold Timer Restarts
A
B
A. Measured
B. Reported
Latching warnings
WARNING
When state latching is enabled, the discrete variable reported to the system will represent the latched value which may not
be the actual state value measured by the Rosemount 702 Transmitter
WARNING
Ensure that the state latch time value is long enough for the value to be reported throughout the entire system to
guarantee the state transition is not missed. After configuring discrete latching function, check for proper operation at the
system level to ensure the desired state transitions are captured as desired.
System Verification
After installation of the 702DX52 for plunger arrival one must verify functionality.
■Verify the sensor: To do so, pass a ferrous object (ex. Wrench) past the cyclops sensor to simulate an arrival. Verify via the LCD
screen and/or field communicator that channel 1 indicates a state change. If a state change is seen, sensor wiring is correct; if
nothing is seen, please go back through the installation steps and confirm that everything has been done accordingly.
■Verify System integration: It is important to verify the latch time is configured correctly. The default latch period is set to one
minute. Verify the host system can detect the arrival event by moving a ferrous metal object (ex. Wrench) past the arrival
sensor. The signal should be passed from the device, through the Wireless Gateway and detected at the final host application
(ex. PLC, Modbus/OPC, etc.). If nothing is seen, confirm the latch time is appropriate considering the full system scan cycle.
Leak sensors, liquid hydrocarbon detection, measurement option code 61
Terminal block connections
The Liquid Hydrocarbon Detection configuration is intended for use with the Tyco® TraceTek® Fast Fuel Sensor, or TraceTek sensing
cable.
Figure 30: Fuel Sensor Terminal
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Quick Start Guide 19

Figure 31: Fuel Sensor Connection
Connecting to the fast fuel sensor and TraceTek sensing cable
The connections to the Fast Fuel Sensor TraceTek sensing cable are made by matching the appropriately colored wires to the
matching colored termination lugs.
Note
All part numbers associated with the fuel sensor cable wiring refer to products sold by Tyco Thermo Controls, LLC.
The Rosemount 702 Wireless Discrete Transmitter can support up to 3 Fast Fuel sensors. These Fast Fuel sensors are connected
using TraceTek Modular Leader Cable (TT-MLC-MC-BLK), optional modular jumper cables (TT-MJC-xx-MC-BLK) and branching
connectors (TT-ZBC-MC-BLK) as suggested in Figure 32 on page 20.
Figure 32: Fuel Sensor Wiring
$&'()%
A. TT-MLC-MC-BLK (Leader cable)
B. TT-FFS-100 or TT-FFS-250 (Fast fuel sensor probe)
C. TT-MLC-MC-BLK (Leader cable)
D. TT-MJC-xx-MC-BLK (Optional jumper cable)
E. TT-ZBC-xx-MC-BLK (Branch connector)
F. TT-FFS-100 or TT-FFS-250 (Fast fuel sensor probe)
The Rosemount 702 Wireless Discrete Transmitter can support up to 500 feet of TraceTek hydrocarbon or solvent sensor cable
(TT5000 or TT5001 series). The total amount of sensor cable connected to a single Rosemount 702 Transmitter is not to exceed
500 ft. (150 m). However leader cable, jumper cables (if used) and branch connectors are not included in the 500 foot limit. See
Figure 33 on page 21 for typical configurations.
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