© Microhard Systems Inc.
21
3.0 Hardware Description
Drawing 3-5:
IPn3G Rear View
The
DATA (RS232 Port (DCE))
on the rear
of the circuit board is used for:
RS232 serial data (300-921kbps).
The
RS422/485 Port
is used to interface the Nano
Development Board to a DTE with the same
interface type. Either the RS232
or
RS422/485 interface is used
for data traffic.
Vin+/Vin
–
is used to power the unit. The input Voltage range
is 7-30 Vdc.
PoE*
–
The IPn3G can also be powered using Passive PoE on the
Ethernet Port, via a PoE injector.
3.1.2 Connectors and Indicators
3.1.2.2 Rear
On the back of the IPn3G is the Data port, RS485/422 interface, as well as the power connections. The
unit also has the SMA(F) connectors for the Main (TX/RX), GPS and the Diversity (RX) antenna’s.
Name
Data Port
Input or
Output
DCD
1
O
RXD
2
O
TXD
3
I
DTR
4
I
SG
5
DSR
6
O
RTS
7
I
CTS
8
O
RING
9
O
Table 3-2: Data RS232 Pin Assignment
Caution:
Using a
power supply that
does not provide
proper voltage may
damage the modem
.
RS485/422
TxB
-
TxA -
RxB -
RxA -
GND -
Vin+
-
Green Conn.
Pin No.
Name
Input or
Output
6
TxB (D+)
O
5
TxA (D-)
O
4
RxB (R+)
I
3
RxA (R-)
I
2
Vin -
1
Vin +
I
Table 3-3: Data RS422/485 / Vin Pin Assignment
RS485/422
Vin
+
GND
RxA
RxB
TxA
TxB
DATA
ETHERNET
ANTENNA
GPS
RX DIV
Ethernet RJ45 Connector Pin Number
Source
Voltage
1
2
3
4
5
6
7
8
9 - 30 Vdc
Data
Data
Data
DC+
DC+
Data
DC-
DC-
Table 3-4: Ethernet PoE Connections
*PoE only available on mod-
els shipped after March 1,
2013*
