© 2021 Cypress Solutions
Complete Manual: CTM-200 R2 (Revision 1.3)
14
Installing the CTM-200
5.3
Serial Data Cable Connection
The serial data port is a standard DB9 female connector configured as Data Communication Equipment (DCE)
and is wired as per the table below.
DB9 Pin Signal
Name
Direction
1
DOUT5 Digital Output 5
2
RxD
Received Data (by DTE)
CTM-200 to PC
3
TxD
Transmitted Data (by DTE) PC to CTM-200
4
INPUT7 Input 7
5
GND
Signal Ground
6
DOUT6 Digital Output 6
7
RTS
Request To Send
PC to CTM-200
8
CTS
Clear To Send
CTM-200 to PC
9
INPUT8 Input 8
Serial data ports on most computer equipment are configured as Data Terminal Equipment (DTE) with a DB9
male connector. A standard serial data cable will allow for direct connection of the CTM-200 to most computer
and terminal equipment. In some cases it may be necessary to insert a “null modem” or “gender changer” in the
serial data line in order to correctly connect between the devices.
As an option on the CTM-200 a second serial port is available as a 3 pin DCE connection:
PIN1: RxD
PIN2: TxD
PIN3: GND
5.4
General Purpose I/O (GPIO)
The GPIO connector is a 2 x 9 position 3.5 mm pitch connector. Single or double row connectors can be used.
In addition to the 4 outputs and 6 inputs on the GPIO connector an extra 2 outputs and 2 single ended inputs are
available on the RS-232 port.
Digital inputs have pull-down resistors. All general purpose I/O (GPIO) pins (i.e. all input and outputs) have
transient protection.
Phoenix Combicon connector #:
Part Number
Description
Locking Tab
1952092
Single Row
YES
1952335
Single Row
NO
1738872
Dual Row
NO
