Wireless Sensor Transmitter Pulse AcquisitionT24-ACMm-PA
Description
The smallest of our T24 radio telemetry enclosures, the wireless sensor transmitter T24-ACMm-PA is IP50 rated and provides high performance telemetry measurement electronics for pulse.
The high performance T24-ACMm-PA transmitter module collects and processes pulse related measurements, such as speed of rotation, proximity, flow and count, forming part of the T24 modular telemetry system.
The T24-ACMm-PA offers up to 500 m (1,600 ft) range. Low power modes allow the module to ‘power down’ between transmissions or to ‘power off’ completely and can be controlled by other T24 products such as the handheld displays or base stations.
An optional battery pack (T24-BB1) can be chosen to power the T24-ACMm which uses 2 x AAA cells and can be connected via simple 2 part screw field terminals.
T24 transmitters have been designed for battery operation and support an ultra low-power sleep mode whilst offering class leading wireless coverage and range. Configurable transmission rates from once per minute to 200 per second cope with a wide range of measurement and monitoring applications. A choice of enclosures enabling battery connection, field connectivity and environmental sealing up to IP67 ensure these modules provide a flexible solution to your wireless sensor requirements.
Alternatively a choice of enclosures enabling battery connection, field connectivity and environmental sealing up to IP67 ensure these modules provide a flexible solution to your wireless sensor requirements.
View our Enclosure Comparison Sheet to find the right solution.
The T24-ACMi-PA provides a range of excitations (3,5,12 volts). Inputs accept volt free contacts, open collector, 5 V logic and quadrature.
Selectable inputs include: frequency, count, quadrature, mark (space), digital state, rpm and interval.
The wireless pulse acquisition transmitter is configured and calibrated (either by applying known inputs or by table entry) using free T24 Toolkit software which runs on a PC connected to a T24 base station.
Ideal Applications
Pulse and RPM monitoring
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Event counting from reed switches or encoders
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Digital input monitoring in wireless systems
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Button state and toggle switch monitoring
Designed for flexibility, reliability, and ease of use, the enhanced T24 Pulse Acquisition Module is a powerful tool for integrating a wide range of pulse-based sensors into your wireless measurement system.
The licence free 2.4 GHz direct sequence spread spectrum (DSSS) radio technology offers high integrity, error free communications which can co-exist with other wireless technologies such as Wi-Fi, Bluetooth® and Zigbee®. FCC, ETSI and IC approvals.
Module transmits and Receives giving:
1. Full error detection and correction
2. Calibration & configuration via radio telemetry
3. Ability to be switched from sleep to operating mode via radio
4. mV/V Calibration stored within the module
5. Remote battery check
6. Data Encrytion for complete security (128 bit AES)
*Maximum range achieved in open field site with the T24 acquisition module at a height of 3 metres (9.8 feet) above ground and T24-HS held at chest height pointing towards the acquisition module. Specification at 3V supply at 25°C
Product Features & Benefits
- Wireless range up to 500 m (1,600 ft)
- Miniature telemetry module measuring 76 x 24 x 20 mm
- T24-ACMi-PA transmitter module for pulse-related measurement
- Supports excitation voltages of 3, 5, or 12 V
- Configurable on-board pull-up or pull-down resistor
- Constant monitoring modes
- High speed transmission – up to 200 updates per second
- Low power mode for extended battery life
- Remote power ‘on’ and ‘off’
- Transmits on licence-free 2.4 GHz frequency
- Simple wireless configuration and calibration
- Ideal in applications involving rotating parts
- Optional battery pack (T24-BB1 see order Information below)
- Easy connectivity with screw terminals for connection to a variety of sensors
- Additional measurement modes:
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Quadrature input
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Digital state mode
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Mark-space ratio
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Specifications
| Measurement Specifications | |
|---|---|
| Period input range | 333 μS to 2 s |
| Frequency input range | 0.5 to 3,000 Hz |
| RPM input range (1 pulse / rev) | 30 to 180,000 RPM |
| Volt free input pull-up resistor | 56 kΩ |
| Pulse input voltage range | 1.2 V to 12 V |
| Accuracy as % input error at 1 Hz (max) | 0.15% |
| Accuracy as % input error at 1 kHz (max) | 0.25% |
| Internal resolution | 0.25 μs |
| Reset count input | volt free |
| Reset count input pull-up resistor | 20 to 50 kΩ |
| Excitation available | 3,5,12 Vdc @ 25 mA |
| Transmission rates | From 5 ms to 1 per minute |
| Environmental | |
|---|---|
| Operating temperature range | -20 to 55 ºC |
| Storage temperature range (no batteries) | -40 to 85 ºC |
| Maximum humidity | 95%RH |
| Environmental protection with suitable cables existing through cable glands | IP50 |
| Power Supply | |
|---|---|
| ACMm | 2.1 to 3.6 Vdc |
| Battery Life, Based on transmitting results at 3 per second | No excitation required |
|---|---|
| 2xAAA with BB1 | 2 months |
| Radio | |
|---|---|
| Radio type | Licence exempt transceiver |
| Radio frequency | 2.4 GHz |
| Transmit power | 10 mW |
| Range | Up to 500m |
Dimensions
76mm X 35mm X 20mm
Downloads
T24 Wireless Telemetry User Manual V.01-15
T24 Wireless Telemetry Toolkit
100 Channel Logging & Visualisation Software (T24LOG100)
T24 Enclosure Comparison Sheet
White Paper – A Guide to Effective T24 Wireless Telemetry Installation
Technical Guide – Carrying Out a Wireless Site Survey
White Paper – Getting The Best From Wireless Instrumentation
FAQ
| Q | What excitation ranges does the T24-PA provide? |
| A | The T24-PA transmitter module provides a range of excitations of 3, 5 and 12 volts |
| Q | What types of inputs can be used? |
| A | Any volt free contact input such as relays, voltage sources (up to 24 volts) and NPN open collector inputs. |
| Q | What measurement modes are available? |
| A | Selectable measurements include: frequency, count, quantrature, mark (space), digital state, RPM and interval |
| Q | How accurate is the measurement? |
| A | At a slow input rate of 1Hz the accuracy is 0.15% and at 3Hz the accuracy is 0.25%. Just under half this error is to allow for temperature drift over the full operating temperature range of the T24-PA device (-40 to +85 degrees) so the accuracy in a stable temperature environment is far better. |
| Q | How do I calibrate the output? |
| A | The T24-PA is factory calibrated to the nearest 0.25 μS which provides users with a set of predefined outputs; Hz, RPM and Period. All of these values can have a custom gain and offset applied to them, the resulting output can therefore be in whatever units or range of values you require. |
| Q | What is the counter, and its maximum value? |
| A | The counter is a counter which increments every time a pulse is detected either on rising or falling edge which can be set in the tool kit. The maximum value for the counter is 4,294,967,295 at which point the counter will overflow. |
| Q | How do I reset the counter value of the T24-PA? |
| A | The counter value can be reset either by contacting the digital input to the ground or by transmitting a data packet with a defined data tag from another device, such as a T24-HA, T24-RM1 or even another T24 transmitter module. This can also be achieved with a power cycle. |
| Q | What software is provided with the T24 devices? |
| A | All devices are supported by the T24 Tool Kit which allows users to configure all devices from the T24 range as well as view and log data from transmitters modules in range. The software can also be downloaded directly from our website. |
| Q | How many devices can operate on one radio channel? |
| A | Many devices can operate on the same radio channel depending on the sample rate of the transmitter modules present in the system. The radio channel is capable of supporting up to 200 data packets per second. |
| Q | Can PC software gather data from many devices? |
| A | Yes, Mantracourt provides freeware for logging up to 100 inputs to one base station, in addition the free Windows DLL and COM driver can be used to gather data through a customer’s own PC software. |
| Q | What limits the RF range of the devices? |
| A | Any metal surface will reflect 2.4 GHz radio waves, therefore in a sealed metal box, no RF will escape. However by providing a suitable RF window the signals will propagate out. Water and concrete also limit the RF range. |
| Q | What Frequency does the system operate on? |
| A | Licence free world wide 2.4GHz, although this frequency is used by other equipment, the T24 range has been tested with Bluetooth, Zigbee & WiFi devices without conflicts. |
| Q | Is it possible to use wireless range extenders within T24 network? |
| A | The T24-AR wireless range extender which can be added to the system can propagate a signal around corners and obstacles. This unit can also double the effective range – but only once. |
| Q | Is the system point to point? |
| A | Yes, however the modules may also operate in many to one (such as multiple data transmitters modules communicating with a base station) and one to many (such as a data transmitter module supplying data to multiple handhelds and displays). |
| Q | What is the communication protocol |
| A | Proprietary protocol based on a 802.15.4 chip. This allows the T24 range to co-exist with Bluetooth, Zigbee & WiFi devices without conflicts. |
| Q | What are the sampling rates of the transmitter modules? |
| A | The T24 standard transmitter modules (SA, IA, VA, RA, TA, PA) sample from 0-200 updates/sec. The T24-SA fast transmitter modules are fixed at 2,000 updates/sec. |
| Q | What is the resolution of the transmitter modules? |
| A | The noise free resolution for a sample time of 10 milli-seconds or less is 15.5 bits for the T24 SA, 12.5 bits for the T24-VA, 14 bits for the VA and 12.25 bits for the T24IA.
The T24-PA’s accuracy % input error @ 1 Hz is 0.15% and for the T24 RA the accuracy is 0.01% of the full scale. With increased sample times resolution can be increased up to 18.75 bits for the T24-SA. |
| Q | Can power be provided to a sensor? |
| A | Yes, all transmitter modules feature a 5V supply which is a excitation voltage (with exception of T24-RA which has 2.5V supply). |
| Q | What is the required power supply for the T24-PA? |
| A | This depends on the enclosure used – see options below:
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| Q | What is the difference between the “i” and “e” versions of the transmitter units? |
| A | The ‘i’ modules all feature an on-chip integrated antenna. The ‘e’ modules are fitted with a miniature UFL connector which can be used with any of the antenna options available; the T24-ANTA (PCB antenna) or T24-ANTB (fixed 90 degree Whip antenna) or T24-ANTC (flexible whip antenna) or T24-ANTD (‘puck’ antenna fitted with a 0.6m cable and RPSMA connector and supplied with a 100 mm RPSMA to UFL adaptor cable) or T24-ANTE (‘puck’ antenna fitted with a 100 mm cable and UFL connector) |
| Q | How many transmitter modules can be acquired by the base stations? |
| A | Each base station can use one of 15 channels. From that selected channel a base station can collect data simultaneously from any number transmitter modules depending upon the frequency of readings being provided by the transmitter module. |
| Q | What are the input ranges of the T24 transmitter modules? |
| A | T24-SA 2.5mV/V calibrated strain gauge based measurement; T24-VA 0-10V, T24-IA 4-20mA, T24-TA pt100 sensor input, T24-RA potentiometer 500 to 100000 Ohms and T24-PA 0.5Hz to 3kHz. |
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