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76 LF-Series Flowmeters: Sensor/Transmitter Installation
Dimensions and Specifications
A.3.3 LF-Series DIN transmitters
Table A-16 FM transmitter hazardous area classifications
Approvals agency Classification
CSA
(1)
(1) CSA is a Canadian approvals agency that provides approvals accepted both in the U.S.A. and in Canada.
Class I Division 2 Groups A, B, C, D
Class II Division 2 Groups F and G
Class III Division 2
ATEX
(2)
(2) ATEX is a European directive.
With display:
II 3 G EEx nC [L] IIB+H2 T6
II 3 D IP66/IP67 T65°C
Without display or with optional display cover:
II 3 G EEx nC [L] IIC T6
II 3 D IP66/IP67 T65°C
Table A-17 DIN transmitter physical specifications
Housing Polyamide PA 6.6
Weight 0.52 lbs (0,24 kg)
Mounting and cabling DIN rail transmitters are mounted on a 35 mm rail. The rail must be grounded.
Transmitters include a mounting bracket and 6.5 ft (2 m) of 4-wire twisted-pair
shielded signal cable. Additional lengths up to 1000 ft (300 m) can be purchased.
Status LED Three-color LED status light on face of transmitter indicates flowmeter condition at
a glance, using a solid green, yellow or red light. Zero in progress is indicated by a
flashing yellow light.
Zero button A zero button on the face of the transmitter can be used to start the transmitter zero
process.
Table A-18 DIN transmitter electrical connections
Input and output connections Three pairs of wiring terminals for transmitter outputs
One pair of terminals for digital communications (Modbus/RS-485)
Plug connectors accept stranded or solid conductors, 24 to 12 AWG
(0,2 to 3,5 mm
2
)
Power connections Two pairs of terminals
• Either pair accepts DC power
• The remaining pair is used for making a jumper connection to a second
transmitter
Plug connectors accept stranded or solid conductors, 24 to 12 AWG
(0,2 to 3,5 mm
2
)
Sensor connection The transmitter has two pairs for the 4-wire connection to the sensor
• One pair is used for the RS-485 connection to the sensor
• One pair is used to supply power to the sensor
Plug connectors accept stranded or solid conductors, 24 to 12 AWG
(0,2 to 3,5 mm
2
)