microBlox® Transmitter/Alarm Carrier
Model uBTA-H-1MR/uBTA-H-1SR/uBTX-H-1
Acromag, Inc. Tel: 248-295-0880
- 18 -
http://www.acromag.com
- 18 -
https://www.acromag.com
How It Works
Key Points of Operation
-
Input Module plugs in and are
available for current, voltage,
RTD, and temperature input.
-
Carriers include dual mechanical
or solid-state alarm contacts.
-
Carriers also drive voltage and
current transmitter outputs.
- All I/O uses 16-bit A/D and D/A
conversion.
- Isolated 6-32V DC Powered.
-
Input, Output, Power, and each
Relay are isolated from each
other.
A microBlox® input module is captively-plugged into this carrier through its front
panel. The carrier drives isolated 5V power to the module from an isolated flyback
converter that operates from 6-32V. It receives a 0-5V output signal from the
plugged-in module, isolated from and proportional to the module
’s
field input
signal. A local microcontroller on the carrier handles alarm management. It
retrieves alarm configuration information from the module via a serial bus. Alarm
configuration parameters are set inside the module via a Bluetooth wireless
technology link to the module from a smartphone or tablet using the Acromag
Agility mobile app. The carrier includes separate analog output terminals for
module output voltage (0-5V/5mA), and locally derived output current (0-
20mA/550Ω). The carrier includes dual FORM C (SPDT) mechanical relay contacts,
or dual FORM A (SPST) solid-state relay contacts depending on model. A 15-turn
mechanical pot on the carrier allows optional fine adjustment of its current output
for long-term maintenance purposes or to correct for circuit aging. Refer to the
block diagram above to gain a better understanding of how this carrier works.
Alarm Operation
uBTA-H-1x Models Only
With two relays, this product supports two High or Low limits, or two window
alarms. Refer to the following figures to understand how the limit and window
alarms operate: