Dwyer Instruments 616D Operating Manual
Series 616D DIN Rail Differential Pressure Transmitter
2-57/64
[38.10]
13/16
®
Specications - Installation and Operating Instructions
Bulletin P-616D
The SERIES 616D DIN Rail Differential Pressure Transmitter senses the pressure
of air and compatible gases and sends a standard 4 to 20 mA or 0 to 10 VDC output
signal. The 616D housing is specically designed to mount on a 35 mm DIN rail in
a panel. This mounting style allows for several units to be mounted closely together
reducing required space. The span and zero controls are for use when checking
calibration, and are not intended for re-arranging to a signicantly different span.
Versatile circuit design enables operation in 2-wire current loops.
INSTALLATION
1. Location: Select a clean, dry mounting location free from excess vibration where
the temperature will remain between 14 and 185°F (-10 to 85°C). Distance from the
receiver is limited only by total loop resistance. See electrical connections in Figure 1.
The tubing supplying pressure to the instrument can be practically any length required,
but long lengths will increase response time slowly.
2. Position: A vertical position, with pressure connections pointing down, is
recommended. That is the position in which all standard models are spanned and
zeroed at the factory. They can be used at other angles, but nal spanning and zeroing
must be done while the transmitter is in that alternative position.
3. Pressure Connections: Two installable barbed tubing connections are provided.
They are dual-sized to t both 1/8˝ and 3/16˝ (3.12 and 4.76 mm) I.D. tubing. Be sure
the pressure rating of the tubing exceeds that of the operating ranges.
2-3/8
[60.33]
2-3/8
[60.33]
[73.42]
1-1/2
SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult factory.
Accuracy: ±0.25 FS @ 77°F (25°C).
Thermal Effect: ±0.02% FS/°F (±0.036% FS/°C).
Stability: ±1% FS/yr.
Temperature Limits: 14 to 185°F (-10 to 85°C).
Pressure Limits: See chart.
Power Requirements: 10 to 35 VDC (2-wire), 17 to 36 VDC, or isolated 21.6 to 33
VAC (3-wire).
Output Signal: 4 to 20 mA (2-wire) or 0 to 10 VDC (3-wire).
Zero and Span Adjustments: Push buttons.
Loop Resistance: Current output: 0 to 1250 Ω (max); Voltage output: Load
resistance 1 kΩ (min).
Current Consumption: 40 mA max.
Electrical Connections: Screw-type terminal block.
Process Connections: 1/8˝ female NPT. Accessories included are 2 barbed ttings
for 1/8˝ and 3/16˝ (3.12 and 4.76 mm) I.D. rubber and vinyl tubing.
Mounting Orientation: Vertical, on a 1.378 (35 mm) DIN rail.
Weight: 4.8 oz (136 g).
Agency Approvals: CE.
[20.64]
3/4
[19.05]
Series 616D Transmitter Models & Ranges
MODEL CHART
Model Range Max. Pressure
616D-2
616D-3
616D-4
616D-5
616D-6
616D-7
616D-8
0 to 6 in w.c.
0 to 10 in w.c.
0 to 20 in w.c.
0 to 40 in w.c.
0 to 100 in w.c.
0 to 200 in w.c.
0 to 10 psid
Table 1
10 psig
10 psig
20 psig
20 psig
15 psig
45 psig
45 psig
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: info@dwyermail.com
ELECTRICAL CONNECTIONS
CONNECTIONS
CURRENT OUTPUT WIRING
CAUTION
designed for 120 or 240 VAC line operation.
Electrical Connections are made to the terminal block located in front of the transmitter.
Terminals are marked PWR, COM, and VOUT. (See Figure 1 below)
Do not exceed specied supply voltage ratings. Permanent
damage not covered by warranty will result. This unit is not
The range of appropriate receiver load resistances (RL) for power supply voltage
available is given by the formula listed below. Shielded 2-wire cable is recommended
for control loop wiring. Ground the shield at the power supply end.
NOTICE
of the transmitter or receiver be inadvertently reversed, the loop will not function
properly, but no damage will be done to the transmitter.
The receiver may be connected to either the negative or positive
side of the loop, whichever is most convenient. Should the polarity
VPS - 10.0
RL =
20 mA DC
SPAN AND
ZERO ADJUST
ELECTRICAL
Electrical Connection:
The Series 616D simultaneously transmits a 2-wire 4 to 20 mA current output and a
3-wire 0 to 10 V voltage output via a screw-type terminal block. The transmitter can
be wired in one of the following three ways to utilize the current and/or voltage output.
Power Supply
Refer to Table 2 for the required supply rating.
MODEL CHART
Output Type Power Supply Rating
2-wire current
3-wire voltage
Simultaneous current and voltage
Choose a power supply with a voltage and current rating sufcient to meet the power
specications under all operating conditions. If the supply is unregulated, make sure
that the output voltage remains within the required voltage range under all power line
conditions. Ripple on the supply should not exceed 100 mV.
2-Wire 4 to 20 mA Current Operation
CAUTION
are not designed for AC voltage operation.
The connections to the transmitter are made through terminals PWR and COM on the
terminal block as shown in Figure 2.
Figure 1: Electrical Connections
10 to 35 VDC (40 mA min)
17 to 36 VDC or 21.6 to 33 VAC (40 mA min)
17 to 35 VDC (40 mA min)
Table 2
Do not exceed specied supply voltage ratings. Permanent
damage not covered by warranty will result. Simultaneous outputs
The maximum length of connecting wire between the transmitter and the receiver is
a function of wire size and receiver resistance. That portion of the total current loop
resistance represented by the resistance of the connecting wires themselves should
not exceed 10% of the receiver resistance. For extremely long runs (over 1,000
ft/305 m), it is desirable to select receivers with lower resistances in order to keep the
size and cost of the connecting leads as low as possible. In installations where the
connecting run is no more than 100 ft (30.5 m), connecting lead wire as small as No.
22 ga. can be used.
3-Wire 0 to 10 V Voltage Operation
CAUTION
The connections to the transmitter are made to Terminals PWR, COM, and VOUT on
the terminal block as shown in Figure 3.
The minimum receiver load is 1 kΩ. The resistance due to the wire should be low
compared to the receiver load resistance. While the voltage at the terminal block
remains unchanged with a 10 mA current ow, resistive losses in the wiring do cause
errors in the voltage delivered to the receiver. For a 1% accuracy gauge, the resistance
of the wires should be less than 0.1% of the value of the receiver load resistance. This
will keep the error caused by the current ow below 0.1%.
Do not exceed specied supply voltage ratings. Permanent
damage not covered by warranty will result.
POWER
SUPPLY
VOLTAGE OUTPUT WIRING
Figure 3: Voltage Output Wiring
VOLTAGE
RECEIVER
CURRENT
RECEIVER
POWER
SUPPLY
Figure 2: Current Output Wiring
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