Emerson Fisher FIELDVUE L2t Instruction Manual page 4

L2t Liquid Level Controller
October 2023
Table 2. Specifications - Transmitter
Input Signal Source
Hall Effect Sensor and magnet array
Transmitter Output Signal
Analog: 4 to 20 mA DC
High saturation: 20.5 mA
Low saturation: 3.8 mA
High alarm (1) : > 21.0 mA
Low Alarm : < 3.6 mA
(1)
Digital - PENDING:
HART 1200 Baud Frequency Shift Keyed (FSK)
HART Version 7
HART impedance requirements must be met to
enable communication. Total shunt impedance
across the master device connections (excluding the
master and transmitter impedance) must be between
230 and 600 ohms.
HART receive impedance:
Rx: 28.06k ohms
Cx: 5.84 nF
Output Current Limit: 30 mA DC maximum
Integral Limit Switch - PENDING
Two isolated solid state limit switches, configurable
throughout the calibrated travel range or actuated
from a device alert
Off State: 0 mA (nominal)
On State: up to 1 A
Supply Voltage: 24 - 30 VDC
Travel Limit Trip Points
Two
Recommended Power Supply
24 to 30 volts DC; 25 mA
Instrument has reverse polarity protection.
A minimum compliance voltage of 17.75 VDC (due to
HART impedance requirement) is required to
guarantee HART communication
Note: Specialized instrument terms are defined in ANSI/ISA Standard 51.1 - Process Instrument Terminology.
1. Only one High/Low alarm available in a given configuration. Alarms are NAMUR NE43 compliant.
4
Reference Accuracy
$ 1% of output span. Includes combined effects of
hysteresis, linearity, and deadband
Limit Switch: 2% of travel span
Repeatability
$ 0.25% of span
Electromagnetic Compatibility
Meets EN61326-1:2013
Performance is shown in table 3 and
EN61326-3-2:2008
Performance is shown in table 4
General Electrical Safety - Environmental
Conditions
Use: Indoor and Outdoor
Altitude: up to 2000 m
Temperature: -40C to +80C
Relative Humidity: 9.2 - 90%
Supply Voltage Fluctuations: N/A, not connected to
Mains
Transient Overvoltage: Category I
Pollution Degree: 4
Wet Locations: Yes
Operating Ambient Temperature Limits
-40 to 80_C (-40 to 176_F)
Hazardous Area Approvals — PENDING
cCSAus—Intrinsically Safe, Explosion‐proof,
Division 2, Dust Ignition‐proof
ATEX—Intrinsically Safe, Flameproof, Type n,
Dust by intrinsic safety
IECEx—Intrinsically Safe, Flameproof, Type n,
Dust by intrinsic safety or by enclosure
Electrical Housing - PENDING
cCSAus—Type 4X, IP66
ATEX—IP66
IECEx—IP66
Instruction Manual
D104782X012