Chapter 2 – Installation
Multi-Tech Systems, Inc. MultiConnect Serial-to-Ethernet Adapter User Guide (S000344D) 11
Female End of the Multi-Tech Adapter
The following tables explain the Multi-Tech Adapter pin functions.
External Power Powered
Through Pin 6
Signal IN/OUT Signal IN/OUT
Pin 1 CD O Pin 1 CD O
Pin 2 TX O Pin 2 TX O
Pin 3 RX I Pin 3 RX I
Pin 4 DTR I Pin 4 DTR I
Pin 5 GND -- Pin 5 GND --
Pin 6 DSR O Pin 6* Power
Pin 7 CTS I Pin 7 CTS I
Pin 8 RTS O Pin 8 RTS O
Pin 9 RI O
Multi-Tech
Adapter
Female Connector
Pin 9 RI O
*Pin 6 Input Power Consumption
@ 5V DC: Typical 190mA Maximum 245mA
@ 10V DC: Typical 100mA Maximum 120mA
@ 15V DC: Typical 69mA Maximum 83mA
@ 20V DC: Typical 54mA Maximum 65mA
@ 25V DC: Typical 45mA Maximum 55mA
Warning:
When supplying power to the RS-232 connector of the adapter, make sure
the power does not feed the DTE device.
Male End of the Multi-Tech Adapter
The following table explains the Multi-Tech Adapter pin functions.
RS-232
Signal IN/OUT
Pin 1 CD I
Pin 2 RX I
Pin 3 TX O
Pin 4 DTR O
Pin 5 GND -
Pin 6 DSR I
Pin 7 RTS O
Pin 8 CTS I
Pin 9 RI I
Multi-Tech
Adapter
Male Connector