Product Manual

Product Manual for Tornado Radio Unit
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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
Tornado serial 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