Data connections – Sentry Industries PT40 User Manual

Page 58

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Data Connections

RS-232 port

Sentrys 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

6

7 54321

8

3

Transmit Data

TD

Output

4 Signal

Ground

5

Signal Ground

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

1

2

3

4

5

6

7

8

9

3 Transmit

Data TD

Input

4

Data Terminal Ready DTR

Input

5

Signal Ground

6

Data Set Ready

DSR

Output

7

Request to Send

RTS

Input

8

Clear to Send

CTS

Output

8

Clear to Send

CTS

Output

Modem Port

Sentrys without an integrated modem are equipped 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 Sentry RPM to
an external modem.

Pin

DTE Signal Name

Input/Output

1

Data Carrier Detect DCD

Input

2 Receive

Data

RD

Input

1

2

3

4

5

6

7

8

9

3 Transmit

Data TD Output

4

Data Terminal Ready DTR

Output

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.

54

• Appendices

Sentry Commander - PT40

Technical Specifications

Installation and Operations Manual

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