User guide

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PN 074-566-P1B

Composer Elite Operating Manual

Only serial communications baud rate of 115,200 is supported.

The communications interface operates using the DCE (Data Communications

Equipment) configuration.

NOTE: Some RS-232 hardware/software combinations may occasionally

cause a command to not be recognized by Composer Elite.

Consequently, all communications should include an automatic retry

procedure if a response is not received within three seconds.

CAUTION

RS-232 uses single-ended signaling with all signals sharing

a common ground, making it susceptible to cross-talk and

noise if the RS-232 cable is not properly shielded and not

routed away from sources of noise. A very high data rate can

overwhelm the internal buffers of the computer, resulting in

data loss. Computer configuration (such as a power setting

that allows the computer to sleep during a run) can cause

data loss. Data loss can occur due to issues inherent to the

Windows operating system, including the diversion of

computer resources when Windows Automatic Update or

antivirus software checks for updates on the Internet.

Figure 5-1 9-pin type “D” female connector

Table 5-1 RS-232C 9-pin type "D" connector pin connections

Pin# Description DB9* DB25**

1 Not Used 1 -

2 TXD Data transmitted by the Sensor Control Unit 2 3

3 RXD Data received by the Sensor Control Unit 3 2

4 DSR Not Used 4 -

5 GND Signal Ground 5 7

6 DTR Not Used 6 6

7 CTS Not Used 7 4

8 RTS Not Used 8 -

9 GND Not Used 9 -

*Host

**IBM compatible computer connector