Product Manual
Table Of Contents
- Abbreviations And Acronyms
- 1 Tornado System Overview
- 2 Safety Warnings
- 3 Tornado radio unit overview
- 4 Setting Up on the Bench
- 5 Configuration Control and Monitoring System (CCMS)
- 6 Changing Operating Frequency and Power Calibration
- 7 Duplexer Tuning Guide
- 8 Radio Reference Information
© MiMOMax Wireless Ltd
Tornado Product Manual
44
8.2.5 Interface ports
The radio unit has Ethernet and asynchronous serial interfaces as well as a General-Purpose Input/Output (GPIO). The GPIO
connector incorporates an alarm and external reference. Various synchronous serial standards are also supported via external
converter boxes. The serial pin out is briefly described in this document. Please refer to the manual for detailed information
on configuring the unit’s serial interfaces.
8.2.5.1 Ethernet
The radio unit has dual 10/100Base-Tx ports which are connected to the CPU via a managed switch. The ports support auto
MDI-X, auto negotiation, half & full duplex operation and flow control. These parameters can be configured in the network
section of CCMS.
8.2.5.2 Asynchronous Serial (RS232)
The Tornado RS232 pin out is as per the EIA/TIA – 561 standards. Note: this is different to older MiMOMax products.
Signal Name
Pin number
Direction
Tx Data
6
In to radio
Rx Data
5
Out of radio
CTS
7
Out of Radio
RTS
8
In to Radio
Ground
4
n/a
5VDC 1 Out of Radio
8.2.5.3 GPIO/Alarm/REF
The GPIO alarm and reference in/out signals are available via a 12-pin connector on the front of the tornado (see GPIO
Connector below). A complete cable loom is available from MiMOMax, or alternatively the female connector required is a
JST HRP-12-S. For pinouts see Table 4: GPIO pin out.
Configuration of the GPIO should be performed using CCMS. See System > User GPIO for more information.
• The alarm provides both open and closed in alarm contacts and is isolated from the rest of the radio circuitry.
• The External reference input/output is an isolated differential pair.
GPIO as analog input:
• The GPIO signals are all referenced to the Radio ground. Their linear range is 0-12V, but they will survive up to 60V.
An external series resister can be used to provide a higher linear range using the following formula.
Rext = (Vmax - 12)*109k/12
• Where Vmax is the maximum voltage that will be measured, 109k is the input impedance, and Rext is an external
series resister between the voltage being measured and the tornado GPIO pin. Remember to round the resister
value up to the nearest resistor value above the calculated value.