Data Connections

RS-232 port

PT22s are equipped standard with an RJ45 DTE RS-232c serial port. This connector may be used for direct local access or from other serial devices such as a terminal server. An RJ45 crossover cable is provided for connection to an RJ45 DCE serial port.

Pin

DTE Signal Name

 

Input/Output

 

1

Request to Send

RTS

Output

 

 

 

 

 

 

 

 

 

 

 

 

 

2

Data Terminal Ready

DTR

Output

 

 

 

 

 

 

 

 

 

 

 

 

 

3

Transmit Data

TD

Output

 

 

 

 

 

 

 

 

 

 

 

 

 

4

Signal Ground

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

Signal Ground

 

 

 

 

 

 

 

 

 

 

 

87

654321

 

 

 

 

 

 

 

 

 

 

 

 

 

6

Receive Data

RD

Input

 

 

 

 

 

 

 

 

 

 

 

 

 

7

Data Set Ready

DSR

Input

 

 

 

 

 

 

 

 

 

 

 

 

 

8

Clear to Send

CTS

Input

 

RJ45 to DB9F serial port adapter

Additionally, an RJ45 to DB9F serial port adapter is provided for use in conjunction with the RJ45 crossover cable to connect to a PC DB9M DCE serial port. The adapter pinouts below reflect use of the adapter with the provided RJ45 crossover cable.

Pin

DCE Signal Name

 

Input/Output

 

 

 

 

1

 

 

 

 

 

 

 

2

Receive Data

RD

Output

 

 

 

 

3

Transmit Data

TD

Input

5

4

3

2 1

4

Data Terminal Ready

DTR

Input

9

8

7

6

5

Signal Ground

 

 

 

 

 

 

6

Data Set Ready

DSR

Output

 

 

 

 

7

Request to Send

RTS

Input

 

 

 

 

8

Clear to Send

CTS

Output

 

 

 

 

Modem Port

PT22s are equipped standard with a DB9-male RS-232C DTE Modem serial port. This connector is typically used to connect to an external modem, but may also be used to connect to any RS-232C device. A 9-pin female to 25-pin male cable is included for connecting the PT22s to an external modem.

Pin

DTE Signal Name

 

Input/Output

 

 

 

 

1

Data Carrier Detect

DCD

Input

 

 

 

 

2

Receive Data

RD

Input

 

 

 

 

3

Transmit Data

TD

Output

1

2

3

4 5

4

Data Terminal Ready

DTR

Output

6

7

8

9

5

Signal Ground

 

 

 

 

 

 

6

Data Set Ready

DSR

Input

 

 

 

 

7

Request to Send

RTS

Output

 

 

 

 

8

Clear to Send

CTS

Input

 

 

 

 

NOTE: To connect to a PC serial port, a null-modem adapter and a female-to-female gender changer are required in addition to the included cable.

LED Indicators

Units are equipped with a status LED for each power receptacle. A lit/on LED indicates that power is being supplied at the port and a darkened/off LED indicates that there is no power at the port.

70 • Appendices

Sentry PT22

 

Installation and Operations Manual