Specifications

E271-2200 and E271-2210 Serial Controllers 27
You may provide a suitable power supply and cabling, or Elo can provide them.
See the AccuTouch Product Manual for details.
Serial Connections
The E271-2200 and E271-2210 controllers operate at standard RS232C levels.
The serial port connection is at P2 on the controller, a 2x5 header with pins on
0.100" centers. It is configured so a ribbon cable and commonly available
insulation displacement connectors (IDCs) may be used.
The controller only requires a 2-wire connection, Transmit Data (TXD) and Signal
Ground (GND). Transmit Data should be connected to your computer's Receive
Data (RXD) pin. For two-way communications, the controller's Receive Data pin
should also be connected to the host's Transmit Data pin.
Data Set Ready (DSR) and Clear to Send (CTS) may be used by the host to verify
controller connections and operation. DSR is asserted when power is applied to
the controller and CTS is asserted when the controller's power-on sequence is
complete. Data Terminal Ready (DTR) and Request to Send (RTS) can also be
connected for full hardware handshaking.
Elo's ELODEV driver requires two-way communication (unless the p flag is
used), and all four handshaking lines.
P2 Pins Signal DB25 DB9
1 DCD 8 1
2 DSR 6 6
3 RXD 3 2
4 RTS 4 7
5 TXD 2 3
6 CTS 5 8
7 DTR 20 4
8 RI (N/C) 22 9
9 GND 7 5
10 Key
CAUTION
Observe polarity when connecting the power leads to the power supply. Reversing
polarity may damage the controller.