APG DST-2421 Installation Manual

Thank You
Thanks for purchasing a DST mid-range pump-control ultrasonic sensor from us! We appreciate
your business and your trust. Please take a moment to familiarize yourself with the product and this
manual before installation. If you have any questions, at any time, don't hesitate to call us at 888-
525-7300.
 NOTE: Scan the QR code to the right to see the full
user manual on your tablet or smartphone. Or visit
https://www.apgsensors.com/support to find it on our
website.
Table of Contents

1. Description

5. Installation Guidelines

2. How To Read Your Label

6. Connecting to a DCR

3. Warranty

7. Sensor Wiring

4. Dimensions

8. General Care
Description
1
The DST series is APG's line of ultrasonic sensors used in conjunction with a DCR controller to give
you a simplified, stand-alone system. The transmit and receive circuit is built into the sensor and
digitally communicates the detected distance to the DCR controller. This allows the sensor to be
separated from the DCR controller by up to 2000 feet (610 meters) with no signal loss.
How To Read Your Label
2
Each label comes with a full model number, a part number, and a serial number. The model
number for your DST will look something like this:
 SAMPLE: DST-2421-C10
The model number tells you exactly what you have. You can also call us with the model, part, or the
serial number and we can help you.
You'll also find all hazardous certification information on the label.
Warranty
3
This product is covered by APG's warranty to be free from defects in material and workmanship
under normal use and service of the product for 24 months. For a full explanation of our Warranty,
please visit https://www.apgsensors.com/about-us/terms-conditions. Contact Technical Support to
recieve a Return Material Authorization before shipping your product back.
Scan the QR code below to read the full explanation of our Warranty on your tablet or smartphone.
Dimensions
4
Liquid Tight
Non-Metallic
Spiral Strain
Relief
3/4" NPT
Threads
2" NPT
Threads
Dimensions: in./mm
1.99
50.54
Liquid Tight
Non-Metallic
Spiral Strain
Relief
3/4" NPT
Threads
2" NPT
Threads
9. Repair Information
10. Hazardous Location Wiring
Liquid Tight
Non-Metallic
Spiral Strain
Relief
3/4" NPT
Threads
6.99
177.5
3.07
78.0
4.98
126.5
3" NPT
Threads
1.36
34.5
3.00
76.20
5.67
144.0
4.50
3.67
114.3
93.2
3.07
78.0
DST Mid-Range Ultrasonic Sensor
Installation Guide
DST-2421, DST-3431, DST-5111, DST-9421
APG
R
Automation Products Group, Inc.
1025 W 1700 N Logan, UT 84321
www.apgsensors.com | phone: 888-525-7300 | email: sales@apgsensors.com
Installation Guidelines
5
Your DST should be installed in an area--indoors or outdoors--which meets the following
conditions:
• Ambient temperature between -30°C and 60°C (-22°F to +140°F)
• Ample space for maintenance and inspection
Additional care must be taken to ensure:
• The sensor has a clear, perpendicular sound path to the surface being monitored.
• The sensor is mounted away from tank or vessel walls and inlets.
• The sound path is free from obstructions and as open as possible for the 9° off axis beam
pattern.
• The sensor is tightened by hand to avoid cross-threading.
*Important:
For user interface guide and sensor configuration, see the DCR-1006A user manual.
 IMPORTANT: Refer to section 10 for Hazardous Location Wiring.
Connecting to a DCR
6
DCR-1006A wiring terminals are accessible by unscrewing and then lifting off the front
(top) face.
24VDC 4-20
85-264 VAC
120-370 VDC
GND
AC/N (-)
AC/L (+)
7.54
191.5
2.31
58.7
Sensor Wiring
5.53
7
140.5
2.69
DST
DST Sensor
68.3
+
-
DST
_
+
 NOTE: For programming the DCR-1006A controller, please see the DCR-1006A
Micro User Manual.
Connector
3.03
77.0
RS-485 RS-485 SWITCH TRIP 1 TRIP 2 TRIP 3
NET SENSOR INPUT
Standard Cable Micro-Connector
Red Pin 1 (Brown)
Black Pin 3 (Blue)
Part # 200851
Doc #9006501 Rev A
TRIP 4
DST
_
+