Microhard Systems Nano IP Series Operating Manual page 24

3.0 Hardware Description
All serial communications signals are logic level (0 and 3.3V). DO NOT connect RS-232 level (+12, -
12VDC) signals to these lines without shifting the signals to logic levels.
Serial RxD is the data received by the radio through the wireless link and output via the serial port; Serial
TxD is the data received into module from the serial port and transmitted over the wireless link.
© Microhard Systems Inc.
Pin Name No.
RSSI3_LED 26 Receive Signal Strength Indicator 3. Active high, can drive LED directly. 1mA
RSSI2_LED 28 Receive Signal Strength Indicator 2. Active high, can drive LED directly. 1mA
RSSI1_LED 30 Receive Signal Strength Indicator 1. Active high, can drive LED directly. 1mA
COM1_CTS 32 Data Port. Clear To Send. Active low output.
COM1_RTS 34 Data Port. Request To Send. Active low input.
COM1_DSR 36 Data Port. Data Set Ready. Active low output.
RING 38 Incoming RS232 or RS485/422 selector.
COM1_DTR 40 Data Terminal Ready. Active low input.
COM1_TxD 42 Data Port. Transmit Data. Logic level input into the modem.
COM1_RxD 44 Data Port. Receive Data. Logic level output from the modem.
COM1_DCD 46 Data Carrier Detect. Active low output.
USR_1,2,3 35,37,39 *Reserved for future use.*
NC 41,43,45,
47,49
!RE_485 48 Data Port. RS485 Receiver Output Enable. Active Low Output.
DE_485 50 Data Port. RS485 Driver Output Enable. Active High Output.
Vcc 51,53,55,
57,59
GND 52,54,56,
58,60
Pin Name No.
STATUS_LED 26 System Status Indicator. Active High, can drive LED directly. 8mA rating.
NC All Other
Pins
Description
rating.
rating.
rating.
Low for RS232
High for RS485/422
*Reserved for future use.*
Positive voltage supply voltage for the module (3.3V).
Ground reference for logic, radio, and I/O pins.
Table 3-1: J1 Pin-Out Description (continued)
Description
*Reserved for future use.*
Table 3-2: J2 Pin-Out Description (Optional)
CONFIDENTIAL
In/
Out
O
O
O
O
I
O
O
I
I
O
O
O
I
I
In/
Out
O
O
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