Scada And Telemetry Use; Configuring; Summary Of Input And Output Functions - Raveon Tech Series Manual

features. Here is a wiring diagram for an RS232 DB9 connector to be wired to the
GPIO connector.
Or contact Raveon to have the device pre-configured when it is purchased.

SCADA and Telemetry Use

The GPIO is an ideal interface for wireless SCADA and Telemetry systems. It can
operate as a Remote Terminal Unit (RTU) which saves cost in your system. The Tech
Series radio modems support MODBUS RTU communication messages, so Telemetry
systems can utilize MODBUS messages to read and manage the GPIOs. See
application note AN234 for details on how MODBUS is incorporated into these Tech
Series modems. AN230 has detailed information about the MODBUS communication
protocol.

Configuring

The radio will auto-detect the GPIO board and set all necessary parameters to enable
it. By default, the IO pins are set to digital inputs.

Summary of Input and Output functions.

IO pins 3, 4, and 5 can be configured with built-in commands to be either digital inputs,
digital outputs, analog inputs, switched DC power output, open-drain outputs.
Digital Input Specifications:
Low-level input voltage:
High-level input voltage:
Input resistance:
Digital Output Specifications:
Low-level Output voltage:
High Level Output Voltage:
Output resistance:
Open Drain Output Specifications:
Low-level Output voltage, on:
Open drain off leakage resistance
High Level Output Voltage, off:
Output resistance, on:
Switched DC power output: (IO1 and IO2) IO0 does not have this capability.
Output voltage, on:
Maximum Output Current
On state internal resistance
Maximum reverse input voltage when off
Off output off leakage resistance
High Level Output Voltage, off:
Output resistance, on:
ground
Analog Input Specifications:
Low-level input voltage:
High-level input voltage:
Input resistance:
Less than 0.5V
Greater than 2.2V
5K-10K pull-down resistance.
Less than 0.5V
3.0 - 3.3V
250 ohms
0V to 0.5V drawing less than 2.1A.
500uA, 0-5V, < 1mA 5-20V.
0 - 20V
<250 milliohms to ground
Same as DC input, 90%-100%.
2.0 amps
100-250mOhms.
DC input + 150mV
5-200uA
Same limit as RF board within the M21 enclosure.
<25
0V
Vin -1.0V. Vin is the voltage powering the Tech Series product.
220K.
16
0 milliohms to
Raveon Technologies Corp.