Instruction and Operation Manual
X-CM-QmBS-eng
Part Number: 541B052AHG
June, 2008
Appendix A Dimensions and Specifications
QmBS Sensor / QTA Transmitters
A-11
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
)
Table A-19 DIN Transmitter Input/output Signals
All transmitters
One 4-wire sensor signal input connection with ground
Output option code 2
(1 mA, 1 FO)
One active 4–20mA output
• Not intrinsically safe
• Isolated to ±50 VDC from all other outputs and earth ground
• Maximum load limit: 600 ohms
• Can report mass flow or volume flow
• Output is linear with process from 3.8 to 20.5 mA, per NAMUR NE43 (June 1994)
One active or passive frequency/pulse output
• Not intrinsically safe
• Can report mass flow or volume flow, which can be used to indicate flow rate or
total
• Frequency output reports the same flow variable as the mA output
• Scalable to 10,000 Hz
• Maximum output of +24 VDC ±3% with 2.2 kohm internal pull-up resistor
• Output is linear with flow rate to 12,500 Hz
Output option code 5
(2 mA, 1 FO configurable,
multivariable transmitter only)
One or two active 4–20 mA outputs
• Not intrinsically safe
• Isolated to ±50 VDC from all other outputs and earth ground
• Maximum load limit:
- mA1: 820 ohms
- mA2: 420 ohms
• Can report mass flow, volume flow, density, temperature, or drive gain
Output is linear with process from 3.8 to 20.5 mA, per NAMUR NE43 (June 1994)
