Carrier MLP2 Series Guide

Miniature Low Pressure Transmitter
Installation and Operation
#NSA-HH/MLP2-001-W-U-A-A-0P-C, NSA-HH/MLP2-002-W-U-A-A-0P-C, NSA-HH/MLP2-003-W-U-A-A-0P-C
NSA-HH/MLP2-004-W-U-A-A-0P-C, NSA-HH/MLP2-005-W-U-A-A-0P-C, NSA-HH/MLP2-010-W-U-A-A-0P-C
NSA-HH/MLP2-2D5-W-U-A-A-0P-C, NSA-HH/MLP2-D10-W-U-A-A-0P-C, NSA-HH/MLP2-D25-W-U-A-A-0P-C, NSA-HH/MLP2-D50-W-U-A-A-0P-C –11/14/2019
Specifications subject to change without notice.
Catalog No. 11-808-764-01 Page 1of 4
Overview
The Miniature Low Pressure Transmitter (MLP2) Series Low Differential Pressure transmitters are
designed for use in OEM or high density panel mounting applications. Key installation features include
an integral 35 mm Din rail mounting foot, vertically orientated wiring and pressure connections, and a
pushbutton zero function conveniently located on the front cover. The MLP2 incorporates a high
accuracy, piezoresistive, silicon sensing element which senses differential pressure and provides a
linear 4 to 20 mA or DC voltage output equal to the specified pressure range. This technology reduces
warmup shift while also reducing the effect of package stress for increased long term stability. In
addition, the unit contains a de-pluggable terminal block that can be removed for ease of installation.
This unit must be ordered with a single uni or bi-directional pressure range and output signal from +/-
0.1” of water column to a maximum pressure of +/- 40” of water column depending on your application.
All MLP2 Series pressure transmitters are calibrated using NIST Certified equipment. Optional 3 or 5
point NIST Certificates are available and must be specified when placing your order.
Applications: Building and Duct Static Pressure, Filter Monitoring, Air Flow Measurement, Process
Control, Roof Top Units, Air Handlers, Clean Rooms, Isolation Rooms, Data Centers
Part Numbers
NSA-HH/MLP2-001-W-U-A-A-0P-C NSA-HH/MLP2-002-W-U-A-A-0P-C NSA-HH/MLP2-003-W-U-A-A-0P-C
NSA-HH/MLP2-004-W-U-A-A-0P-C NSA-HH/MLP2-005-W-U-A-A-0P-C NSA-HH/MLP2-010-W-U-A-A-0P-C
NSA-HH/MLP2-2D5-W-U-A-A-0P-C NSA-HH/MLP2-D10-W-U-A-A-0P-C NSA-HH/MLP2-D25-W-U-A-A-0P-C
NSA-HH/MLP2-D50-W-U-A-A-0P-C
Specifications
Supply Voltage (VDC):
0-5 VDC Output: +12-36 VDC | 0-10 VDC Output: +16-36 VDC
4-20 mA Output: +16-36 VDC (250 Ohm Load) | +21-36 VDC (500 Ohm Load)
Supply Voltage (VAC):
24 VAC +/- 10%, 50/60 Hz
Supply Current mA (Power
Consumption):
4-20 mA Output: 23 mA minimum (0.83 VA)
VDC Output Signals: 5 mA maximum (0.18 VA)
Output Signals:
4-20 mA: 2-wire Loop Powered (output limited to 20.5 mA maximum)
4-20 mA: 3-Wire, VAC Powered (output limited to 20.5 mA maximum)
0-5 VDC or 0-10 VDC: 3-Wire, VAC or VDC Powered (output limited to 5.25 & 10.25
VDC)
Pressure Ranges:
D10 = 0.10 | D25 = 0.25 | D50 = 0.50 | 001 = 1.00 | 002 = 2.00 | 2D5 = 2.50
003 = 3.00 | 004 = 4.00 | 005 = 5.00 | 010 = 10.00
Accuracy1:
+/- 0.5% FSO (Default) | +/- 0.25% (Optional) for all ranges except 0.1” and +/- 0.1“ wc
Sensor Compensated Temp Range:
32 to 122ºF (0 to 50ºC)
Thermal Effects2:
+/- 0.056% FSO/ºF (+/- 0.10% FSO/ºC)
Warm Up Time:
15 Minutes
Response Time (T95):
4 seconds
Output Update Rate:
500 ms
Zero Function:
Pushbutton Zero Function (Recommended after 15 minutes warm up)
Proof Pressure | Burst Pressure:
Ranges < 1” wc (248.84 pa): Proof: 270” wc (67.2 kPa) | Burst: 415” wc (103.3 kPa)
Ranges > 1” wc (0.2488 kPa) to < 10” wc (2.488 kPa): Proof: 350” wc (87.12 kPa) |
Burst: 550” wc (136.9 kPa)
Ranges > 10” wc (2.488 kPa) to < 40” wc (9953.6 kPa): Proof: 562” wc (140 kPa) |
Burst: 1004.7” wc (250 kPa)
Operating Temperature | Humidity:
32 to 185ºF (0 to 85ºC) | 10 to 95% RH, non-condensing
Storage Temperature | Humidity:
-40 to 176ºF (-40 to 80ºC) | 10 to 95% RH, non-condensing
Media Types:
Intended for use with non-corrosive, non-ionic gases, such as air and other dry gases
Enclosure Material | Flammability
Rating:
Polycarbonate | UL 94 V-0

Miniature Low Pressure Transmitter
Installation and Operation
#NSA-HH/MLP2-001-W-U-A-A-0P-C, NSA-HH/MLP2-002-W-U-A-A-0P-C, NSA-HH/MLP2-003-W-U-A-A-0P-C
NSA-HH/MLP2-004-W-U-A-A-0P-C, NSA-HH/MLP2-005-W-U-A-A-0P-C, NSA-HH/MLP2-010-W-U-A-A-0P-C
NSA-HH/MLP2-2D5-W-U-A-A-0P-C, NSA-HH/MLP2-D10-W-U-A-A-0P-C, NSA-HH/MLP2-D25-W-U-A-A-0P-C, NSA-HH/MLP2-D50-W-U-A-A-0P-C –11/14/2019
Specifications subject to change without notice.
Catalog No. 11-808-764-01 Page 2of 4
Enclosure Temperature Rating:
-40 to 248ºF (-40 to 120ºC)
Din Rail Mounting:
35 mm (U.S. Patent No. 7,416,421)
Wiring Connections | Wire Size:
3 Position de-pluggable screw terminal block | 14 AWG (1.628 mm2) to 24 AWG (0.5105
mm2)
Terminal Block Torque Rating:
4.43 to 5.31 in-lbs. (0.5 to 0.6 Nm)
Pressure Fitting Material:
Brass
Tubing Size Accepted:
0.250” (6.35 mm) O.D. x 0.170” (4.318 mm) I.D. Push-On Flexible Poly Tubing
NIST Certification:
3 Point NIST Test Points: 10%, 50%, & 90% of FSO
5 Point NIST Test Points: 10%, 30%, 50%, 70%, and 90% of FSO
Product Dimensions (L x W x D):
4.210” (106.94 mm) x 2.085” (52.96 mm) x 1.340” (34.04 mm)
Product Weight:
0.17 lbs. (0.078 kg)
Approvals:
CE, RoHS2, WEEE, Reach
1Accuracy includes Hysteresis, Linearity, and Repeatability at 71ºF (21.5ºC) Typical
2Shift is relative to 77ºF (25ºC)
Dimensional Drawing
Front View
Right View
Bottom View
Figure 1
Installation
Precautions
Remove power before wiring. Never connect or disconnect wiring with the power applied. Do not allow live wires to
touch the circuit board.
An isolation transformer is recommended when powering the device with 24 VAC.
Do not run the wiring in any conduit with line voltage.
Failure to wire devices with the correct polarity when using a shared transformer may result in damage to any device
powered by the shared transformer.
Do not remove the cover. All user features are accessible from the outside of the unit.

Miniature Low Pressure Transmitter
Installation and Operation
#NSA-HH/MLP2-001-W-U-A-A-0P-C, NSA-HH/MLP2-002-W-U-A-A-0P-C, NSA-HH/MLP2-003-W-U-A-A-0P-C
NSA-HH/MLP2-004-W-U-A-A-0P-C, NSA-HH/MLP2-005-W-U-A-A-0P-C, NSA-HH/MLP2-010-W-U-A-A-0P-C
NSA-HH/MLP2-2D5-W-U-A-A-0P-C, NSA-HH/MLP2-D10-W-U-A-A-0P-C, NSA-HH/MLP2-D25-W-U-A-A-0P-C, NSA-HH/MLP2-D50-W-U-A-A-0P-C –11/14/2019
Specifications subject to change without notice.
Catalog No. 11-808-764-01 Page 3of 4
Mounting Instructions
Using the two #8 x 3/4” self-drilling mounting screws supplied by ACI, mount the unit vertically with the brass fittings
pointing towards the ground. Attach the unit to the mounting surface using the two mounting openings located on the top
and bottom flanges. This ensures that any condensation that may form in the tubing does not have an effect on the
pressure sensor. If mounting the unit horizontally, a slight zero shift may occur and care must be taken to prevent moisture
from building up in the sensor. For best results, all tubing lengths should be limited to a maximum length of 75 feet (23
meters).
Din Rail Mounting
Figure 2
Pressure Connections
The recommended connection tubing is ¼” O.D. push-on tubing (1/8” – 3/16” I.D.). ACI recommends to keep the tubing
runs as short as possible so as to not affect the response time.
Zero Adjustment
Small positive or negative pressure offsets can be removed using the Zero push button. Make sure that there is no
pressure at the HI and LO pressure fittings. Additionally, a small piece of tubing can be connected between the HI and LO
brass fittings to neutralize any external pressure effects. Press and hold the Zero button for 5 seconds. MLP2 will enter
zero mode AFTER push button is released. The Zero adjustment should only be performed with no pressure applied.

Miniature Low Pressure Transmitter
Installation and Operation
#NSA-HH/MLP2-001-W-U-A-A-0P-C, NSA-HH/MLP2-002-W-U-A-A-0P-C, NSA-HH/MLP2-003-W-U-A-A-0P-C
NSA-HH/MLP2-004-W-U-A-A-0P-C, NSA-HH/MLP2-005-W-U-A-A-0P-C, NSA-HH/MLP2-010-W-U-A-A-0P-C
NSA-HH/MLP2-2D5-W-U-A-A-0P-C, NSA-HH/MLP2-D10-W-U-A-A-0P-C, NSA-HH/MLP2-D25-W-U-A-A-0P-C, NSA-HH/MLP2-D50-W-U-A-A-0P-C –11/14/2019
Specifications subject to change without notice.
Catalog No. 11-808-764-01 Page 4of 4
Duct Assembly
Figure 3
Wiring Instructions
Shielded cable with 16 to 22AWG conductors is recommended.
Use the Wiring Connections table below to determine the proper wiring for your application. Insert the wire into the
depluggable terminal block sockets and tighten the screws. In some circumstances, it may be easier to remove the
terminal blocks while connecting the wires.
Wiring Connections Table
Output signal
Supply voltage
Wire connections
VDC
AC/DC
VIN
GND
OUT
mA
AC
VIN
GND
OUT
mA
DC
VIN
- - - - -
OUT
W.E.E.E. Directive
At the end of their useful life the packaging and product should be disposed of via a suitable recycling center. Do not
dispose of with household waste. Do not burn.