Industrial Grade Modem Hidex II 33T User Manual
Page
3
7/20/2005
Power Supply
5 volt DC power to the modem is supplied through a 2-pin locking connector. Included with each modem is a
switching power supply that will accept 90 to 240 VAC or DC. If you are going to power the modem from 5VDC
remove the connector and attach to another pair of wires to connect to 5 VDC. CAUTION NOTE THE
POLARITY ON THE CONNECTOR. The wire with the white dashes along the wire edge is the negative side.
An alternate power connection is available via pin 10 and pin 1 on DB25 connector. Simply connect the minus
(ground) wire to pin 1 and the plus +5VDC to pin 10.
Data Interface
Data is interfaced via a DB25 female connector.
Pin 1 GRD
Signal Ground
Pin 2 TXD
Transmit Data
Pin 3 RXD
Receive Data
Pin 4 RTS
Request to Send
Pin 5 CTS
Clear to Send
Pin 6 DSR
Data Set Ready
Pin 7 SG
Signal Ground
Pin 8 DCD
Carrier Detect
Pin 10
(Alternate power input +5VDC)
Pin 20 DTR
Data Terminal Ready
Pin 22 RI
Ring Indicate
LED Indicators
DCD Data
Carrier
Detect
RTS
Request To Send
CTS
Clear To Send
TXD Transmit
Data
RXD Receive
Data
RI/DSR Ring Indicate/Data Set Ready
DTR
Data Terminal Ready
Hardware Setup:
Setup Procedure:
1. Use the RS-232 cable to connect the DB25 connector (J1) on the modem to a PC serial port
(Typically COM1).
