Emerson Rosemount 248 User manual

Quick Start Guide
00825-0300-4825, Rev BB
January2024
Rosemount™ 248 Rail Mount
Temperature Transmitter
with RK Option and HART® 7 Protocol

Contents
About this guide...........................................................................................................................3
Installation.................................................................................................................................... 6
Configuration............................................................................................................................. 10
Mounting the transmitter......................................................................................................... 13
Product certifications................................................................................................................ 17
China RoHS................................................................................................................................. 31
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1 About this guide
This guide provides basic guidelines to install the Rosemount 248R
Rail Mount Temperature Transmitter. It does not provide instructions
for detailed configuration, diagnostics, maintenance, service,
troubleshooting, or installations. Refer to the Rosemount 248R
Temperature Transmitter Reference Manual for more instruction.
The manual and this guide are also available electronically at
Emerson.com/Rosemount.
WARNING
Explosions could result in death or serious injury.
Installation of device in an explosive environment must be in
accordance with appropriate local, national, and international
standards, codes, and practices.
Review the Hazardous Locations Certifications for any restrictions
associated with a safe installation.
WARNING
Process leaks could result in death or serious injury.
Install and tighten thermowells and sensors before applying
pressure.
Do not remove the thermowell while in operation.
WARNING
Electrical shock could cause death or serious injury.
Avoid contact with the leads and terminals. High voltage that may
be present on leads can cause electrical shock.
Unless marked, the conduit/cable entries in the housing use a ½–
14 NPT thread form. Entries marked M20 are M20×1.5 thread
form. On devices with multiple conduit entries, all entries will
have the same thread form. Only use plugs, adapters, glands, or
conduit with a compatible thread form when closing these
entries.
When installing in a hazardous location, use only appropriately
listed or Ex certified plugs, glands, or adapters in cable/conduit
entries.
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WARNING
Physical access
Unauthorized personnel may potentially cause significant damage to
and/or misconfiguration of end users’ equipment. This could be
intentional or unintentional and needs to be protected against.
Physical security is an important part of any security program and
fundamental to protecting your system. Restrict physical access by
unauthorized personnel to protect end users’ assets. This is true for
all systems used within the facility.
1.1 Safety messages
WARNING
Explosions
Explosions could result in death or serious injury.
Installation of device in an explosive environment must be in
accordance with appropriate local, national, and international
standards, codes, and practices.
Review the Hazardous Locations Certifications for any restrictions
associated with a safe installation.
Process leaks
Process leaks could result in death or serious injury.
Install and tighten thermowells and sensors before applying
pressure.
Do not remove the thermowell while in operation.
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WARNING
Electrical shock
Electrical shock could cause death or serious injury.
Avoid contact with the leads and terminals. High voltage that may
be present on leads can cause electrical shock.
Unless marked, the conduit/cable entries in the housing use a ½–
14 NPT thread form. Entries marked M20 are M20×1.5 thread
form. On devices with multiple conduit entries, all entries will
have the same thread form. Only use plugs, adapters, glands, or
conduit with a compatible thread form when closing these
entries.
When installing in a hazardous location, use only appropriately
listed or Ex certified plugs, glands, or adapters in cable/conduit
entries.
Physical access
Unauthorized personnel may potentially cause significant damage to
and/or misconfiguration of end users’ equipment. This could be
intentional or unintentional and needs to be protected against.
Physical security is an important part of any security program and
fundamental to protecting your system. Restrict physical access by
unauthorized personnel to protect end users’ assets. This is true for
all systems used within the facility.
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2 Installation
2.1 Safety messages
Instructions and procedures in this section may require special
precautions to ensure the safety of the personnel performing
the operations. Information that potentially raises safety issues is
indicated by a warning symbol.
Please refer to the following safety messages before performing an
operation preceded by this symbol.
WARNING
Failure to follow these installation guidelines could result in death
or serious injury.
Ensure only qualified personnel perform the installation.
Explosions could result in death or serious injury.
Do not remove the housing covers in explosive atmospheres
when the circuit is live.
Before connecting a handheld communicator in an explosive
atmosphere, ensure that the instruments are installed in
accordance with intrinsically safe or non-incendive field wiring
practices.
Verify that the operating atmosphere of the transmitter is
consistent with the appropriate hazardous locations certifications.
All connection head covers must be fully engaged to meet
explosion-proof requirements.
Process leaks could result in death or serious injury.
Do not remove the thermowell while in operation.
Install and tighten thermowells and sensors before applying
pressure.
Electrical shock could cause death or serious injury.
Use extreme caution when making contact with the leads and
terminals.
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2.2 Connections
Table 2-1: Single input connection
2 w / 3 w / 4 w
RTD or lin. R
Thermocouple
(TC) (internal CJC
or external 2 w /
3 w / 4 w CJC)(1)
mV 3 w / 4 w
potentiometer
42 44
43
41
43 I1
41 42 44
43
+
-
CJC
3
41 42 44
43
+
41 42 44
43
4I1
(1) When using thermocouple input, you can configure the transmitter for
either constant, internal, or external CJC via a Pt100 or Ni100 sensor. You
must select the input during device configuration.
2.3 Multidrop mode
The communication is either by means of a HART® communicator or
a HART modem.
The HART communicator or a HART modem can be connected across
BC or CD.
The outputs of a maximum of 63 transmitters can be connected in
parallel for a digital HART two-wire communication.
Before it is connected, each transmitter must be configured with a
unique number from 1 to 63. If two transmitters are configured with
the same number, both will be excluded. The transmitters must be
programmed for multidrop mode (with a fixed output signal of 4
mA). Maximum current in the loop is therefore 252 mA.
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Figure 2-1: Multidrop connection
B
C
D
+
-
+
-
A
E
F F F
A. Power supply
B. Connection
C. Connection
D. Connection
E. 250 Ω < Rload < 1100 Ω
F. Transmitter
2.4 Installation best practices
The terminal connectors can be removed to install sensor and power
wiring. After re-installation back into the device:
1. Align the terminal connectors with the internal pins.
2. Rotate the plastic hooks so that they are properly engaged in
the supporting plastic piece.
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3. Push down on the terminal connector to properly set it into
place.
Note
Improper seating can cause the hooks to wedge against the
supporting plastic and cause the connector to unseat.
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3 Configuration
3.1 Safety messages
Instructions and procedures in this section may require special
precautions to ensure the safety of the personnel performing
the operations. Information that potentially raises safety issues is
indicated by a warning symbol.
Please refer to the following safety messages before performing an
operation preceded by this symbol.
WARNING
Failure to follow these installation guidelines could result in death
or serious injury.
Ensure only qualified personnel perform the installation.
Explosions could result in death or serious injury.
Do not remove the housing covers in explosive atmospheres
when the circuit is live.
Before connecting a handheld communicator in an explosive
atmosphere, ensure that the instruments are installed in
accordance with intrinsically safe or non-incendive field wiring
practices.
Verify that the operating atmosphere of the transmitter is
consistent with the appropriate hazardous locations certifications.
All connection head covers must be fully engaged to meet
explosion-proof requirements.
Process leaks could result in death or serious injury.
Do not remove the thermowell while in operation.
Install and tighten thermowells and sensors before applying
pressure.
Electrical shock could cause death or serious injury.
Use extreme caution when making contact with the leads and
terminals.
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3.2 Configuration methods
The device can be configured in the following ways:
•Using a HART® communicator with Emerson's DDL driver
•Via programming framework (e.g. AMS Device Manager, DCS,
PACTware™)
HART communicator
To get access to product-specific commands, the HART
communicator must be loaded with Emerson's DDL driver. You can
order this through either the FieldComm Group or Emerson.
Figure 3-1: HART commmunicator
44
43
42
41
51
11121314
12
11
A
BC
D
E
F
G
A. Rosemount transmitter
B. Ex area
C. Safe area
D. 250 Ω < Rload < 1100 Ω
E. Receiving equipment
F. +V supply
G. Input
Programming framework
Support for both EDD and FDT®/DTM™ technology, offering
configuration and monitoring via relevant DCS/AMS and supported
management packages (such as PACTware).
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Figure 3-2: Programming framework
12
11
+
-
44
43
42
41
51
11121314
A
B
D
C
A. Rosemount transmitter
B. 250 Ω < Rload < 1100 Ω
C. Process computer
D. DCS, etc.
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4 Mounting the transmitter
4.1 Rail mount transmitter with remote mount sensor
The most basic assembly uses:
•A remote mounted transmitter
•An integral mount sensor with terminal block
•An integral style connection head
•A standard extension
•A threaded thermowell
Refer to the Rosemount DIN-Style Temperature Sensors and
Thermowells (Metric) Product Data Sheet for complete sensor and
mounting accessory information.
4.1.1 Rail mount transmitter with integral mount sensor
The least complicated assembly uses:
•An integral mount sensor with terminal block
•An integral DIN style connection head
•A standard extension
•A threaded thermowell
Refer to the appropriate Product Data Sheet regarding Rosemount
temperature elements for complete sensor and mounting accessory
information.
Procedure
1. Attach the transmitter to a suitable rail or panel.
2. Attach the thermowell to the pipe or process container wall.
Install and tighten the thermowell before applying pressure.
3. Attach the sensor to the connection head and mount the
entire assembly to the thermowell.
4. Attach sufficient lengths of sensor lead wire to the sensor
terminal block.
5. Attach and tighten the connection head cover.
Note
Enclosure covers must be fully engaged to meet explosion-
proof requirements.
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6. Run sensor lead wires from the sensor assembly to the
transmitter.
7. Attach the sensor and power leads to the transmitter.
Note
Avoid contact with leads and terminals.
Figure 4-1: Typical Rail Mount Transmitter Mounting
Configuration Using Integral Mount Sensor and Assembly
A. Rail mount transmitter
B. Sensor leads with cable gland
C. Integral mount sensor with terminal block
D. Connection head
E. Standard extension
F. Threaded thermowell
4.2 Rail mount transmitter with threaded sensor
The least complicated assembly uses:
•A threaded sensor with flying heads
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•A threaded sensor connection head
•A union and nipple extension assembly
•A threaded thermowell
Refer to Rosemount DIN-Style Temperature Sensors and
Thermowells (Metric) Product Data Sheet for complete sensor and
mounting accessory information.
4.2.1 Rail mount transmitter with threaded sensor
The least complicated assembly uses:
•a threaded sensor with flying heads
•a threaded sensor connection head
•a union and nipple extension assembly
•a threaded thermowell
Refer to the appropriate Product Data Sheet regarding Rosemount
temperature elements for complete sensor and mounting accessory
information.
Procedure
1. Attach the transmitter to a suitable rail or panel.
2. Before applying pressure, attach the thermowell to the pipe or
process container wall. Install and tighten the thermowell.
3. Attach necessary extension nipples and adapters. Seal the
nipple and adapter threads with silicone tape.
4. Twist the sensor into the thermowell. If required, install drain
seals for severe environments or to satisfy code requirements.
5. Screw the connection head to the sensor.
6. Attach the sensor lead wires to the connection head terminals.
7. Attach additional sensor lead wires from the connection head
to the transmitter.
8. Attach and tighten the connection head cover.
Note
Enclosure covers must be fully engaged to meet explosion-
proof requirements.
9. Attach the sensor and power leads to the transmitter.
Note
Avoid contact with leads and terminals.
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Figure 4-2: Typical Rail Mount Transmitter Mounting
Configuration Using Threaded Style Sensor and Assembly
A. Rail mount transmitter
B. Threaded sensor connection head
C. Threaded style sensor
D. Standard extension
E. Threaded thermowell
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5 Product certifications
Rev: 1.1
5.1 European Directive information
A copy of the EU Declaration of Conformity can be found at the
end of the Quick Start Guide. The most recent revision of the EU
Declaration of Conformity can be found at Emerson.com/Rosemount.
5.2 Ordinary location certification
As standard, the transmitter has been examined and tested to
determine that the design meets the basic electrical, mechanical,
and fire protection requirements by a Nationally Recognized Test
Laboratory (NRTL) as accredited by the Federal Occupational Safety
and Health Administration (OSHA).
5.3 Installing equipment in North America
The US National Electrical Code® (NEC) and the Canadian Electrical
Code (CEC) permit the use of Division marked equipment in Zones
and Zone marked equipment in Divisions. The markings must be
suitable for the area classification, gas, and temperature class. This
information is clearly defined in the respective codes.
5.4 USA
5.4.1 I5 USA Intrinsically Safe (IS) and Division 2/Zone 2
Certificate 80072530
Standards UL Std No 913 Ed. 8, UL 60079-0 Ed. 5, UL 60079-11 Ed. 6,
UL 60079-15 Ed. 4, UL 61010-1 Ed. 3
Markings Class I, Division 1, Groups A, B, C, D
Class I, Zone 0: AEx ia IIC T6…T4
Class I, Zone 1: AEx ib [ia] IIC T6…T4
Class I, Division 2, Groups A, B, C, D
Class I, Zone 2: AEx nA IIC T6…T4
Class I, Zone 2: AEx nA [ic] IIC T6…T4
Note
When installed per Control Drawing 00248-8000.
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Table 5-1: IS Input Parameters vs Temperature Range
Input
parameters
(Terminals 11,
12)
Temperature
range
Input
parameters
(Terminals 11,
12)
Temperature
range
Ui: 30 Vdc T4: -58 °F (-50 °C)
≤ Ta ≤ 185 °F (85
°C)
Ui: 30 Vdc T4: -58 °F (-50 °C)
≤ Ta ≤ 185 °F (85
°C)
Ii: 120 mA T5: -58 °F (-50 °C)
≤ Ta ≤ 158 °F (70
°C)
Ii: 100 mA T5: -58 °F (-50 °C)
≤ Ta ≤ 167 °F (75
°C)
Pi: 900 mW T6: -58 °F (-50 °C)
≤ Ta ≤ 131 °F (55
°C)
Pi: 750 mW T6: -58 °F (-50 °C)
≤ Ta ≤ 140 °F (60
°C)
Li: 0 uH N/A Li: 0 uH N/A
Ci: 1.0 nF N/A Ci: 1.0 nF N/A
Table 5-2: IS Output Parameters per Terminal Configuration
Parameters One sensor using
all output terminals
(41-54)
Sensor using one set
of output terminals
(41-44 or 51-54)
Uo7.2 Vdc 7.2 Vdc
Io12.9 mA 7.3 mA
Po23.3 mW 13.2 mW
Lo200 mH 667 mH
Co13.5 uF 13.5 uF
Table 5-3: Division 2/Zone 2 Input Parameters vs Temperature
Range
Supply voltage Temperature range
37 Vdc max T4: -58 °F (-50 °C) ≤ Ta ≤ 185 °F (85
°C)
T5: -58 °F (-50 °C) ≤ Ta ≤ 158 °F (70
°C)
T6: -58 °F (-50 °C) ≤ Ta ≤ 131 °F (55
°C)
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Table 5-3: Division 2/Zone 2 Input Parameters
vs Temperature Range (continued)
Supply voltage Temperature range
30 Vdc max T4: -58 °F (-50 °C) ≤ Ta ≤ 185 °F (85
°C)
T5: -58 °F (-50 °C) ≤ Ta ≤ 167 °F (75
°C)
T6: -58 °F (-50 °C) ≤ Ta ≤ 140 °F (60
°C)
NIFW
Vmax = 30 Vdc,
Ci = 1 nF, Li = 0
T4: -58 °F (-50 °C) ≤ Ta ≤ 185 °F (85
°C)
T5: -58 °F (-50 °C) ≤ Ta ≤ 167 °F (75
°C)
T6: -58 °F (-50 °C) ≤ Ta ≤ 140 °F (60
°C)
Special Conditions for Safe Use (X):
1. Install per Installation Drawing 00248-8000 as appropriate.
2. Install in accordance with the US NEC for the US and in
accordance with the CEC for Canada.
3. The transmitter must be installed in suitable enclosure to meet
installation codes stipulated in the CEC or for the US the NEC.
4. If the enclosure is made of non-metallic materials or of
painted metal, electrostatic charging shall be avoided.
5. For Div 2/Zone 2 applications, the transmitter must be
installed in an enclosure providing a degree of protection of
at least IP54 according to IEC60529 that is suitable for the
application and is correctly installed. Cable entry devices and
blanking elements shall fulfil the same requirements.
6. Use supply wires with a rating of at least 5 K above the
ambient temperature.
7. For Div 2/Zone 2 applications, the temperature transmitter
requires connecting to Class 2 Power Supply with Transient
protection. See installation drawing as appropriate.
5.5 Canada
5.5.1 I6 Canada Intrinsically Safe (IS) and Division 2/Zone 2
Certificate: 80072530
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Standards: CSA C22.2 No. 157-92 (R2012), CAN/CSA C22.2 No.
60079-0:11, CAN/CSA C22.2 No. 60079-11:11, CAN/CSA
C22.2 No. 60079-15:12, CSA 61010-1-12
Markings: Class I, Division 1, Groups A, B, C, D
Ex ia IIC T6…T4
Ex ib [ia] IIC T6…T4
Class I, Division 2, Groups A, B, C, D
Ex nA IIC T6…T4
Ex nA [ic] IIC T6…T4
Note
When installed per Control Drawing 00248-8000.
Table 5-4: IS Input Parameters vs Temperature Range
Input
parameters
(Terminals 11,
12)
Temperature
range
Input
parameters
(Terminals 11,
12)
Temperature
range
Ui: 30 Vdc T4: -58 °F (-50 °C)
≤ Ta ≤ 185 °F (85
°C)
Ui: 30 Vdc T4: -58 °F (-50 °C)
≤ Ta ≤ 185 °F (85
°C)
Ii: 120 mA T5: -58 °F (-50 °C)
≤ Ta ≤ 158 °F (70
°C)
Ii: 100 mA T5: -58 °F (-50 °C)
≤ Ta ≤ 167 °F (75
°C)
Pi: 900 mW T6: -58 °F (-50 °C)
≤ Ta ≤ 131 °F (55
°C)
Pi: 750 mW T6: -58 °F (-50 °C)
≤ Ta ≤ 140 °F (60
°C)
Li: 0 uH N/A Li: 0 uH N/A
Ci: 1.0 nF N/A Ci: 1.0 nF N/A
Table 5-5: IS Output Parameters per Terminal Configuration
Parameters One sensor using
all output terminals
(41-54)
Sensor using one set
of output terminals
(41-44 or 51-54)
Uo7.2 Vdc 7.2 Vdc
Io12.9 mA 7.3 mA
Po23.3 mW 13.2 mW
Lo200 mH 667 mH
Co13.5 uF 13.5 uF
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