Microhard Systems IPN4G - Rear

© Microhard Systems Inc. 23
3.0 Hardware Features
Drawing 3-5: IPn4G Rear View
The DATA (RS232 Port (COM0)) on the rear
of the circuit board is used for:
 RS232 serial data (300-921kbps)
The RS422/485 Port is used to interface the IPn4G to a DTE
with the same interface type. Either the RS232 or RS422/485
interface can be used for data traffic, not both.
Vin+/Vin– is used to power the unit. The input Voltage range is
9-30 Vdc.
Digital I/O– The IPn4G has 1 input / 1 output. Inputs have a small wetting
current (Vin) used to detect a contact closure, and prevent false readings by
any noise or intermittent signals, it has a threshold sensitivity of 1.8V.
Maximum recommended load for the output pin is 150mA @ 30 Vdc (Vin).
PoE– The IPn4G 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 IPn4G is the Data (COM0) port, RS485/422 interface, as well as the power connections.
The unit also has the SMA(F) connectors for the Main (TX/RX), the Diversity (RX) antenna’s, and a RP-
SMA Female connector for the optional WiFi antenna.
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 3-3: Data RS232 Pin Assignment
Name
Input or
Output
Tx+ O
Tx1 O
Rx+ I
Rx- I
Vin -
Vin + I
Out O
In I
Table 3-4: Data RS422/485,
Vin, Digital I/O Pin Assignment
Caution: Using a
power supply that
does not provide
proper voltage may
damage the modem.
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 3-5: Ethernet PoE Connections
Vin-
Vin+
GND
GND
Tx-
Tx+
Rx+
Rx-
In
Out
O I