Connecting Serial Communications Devices

Chapter 6

Connecting Additional Equipment

Connecting Serial

Communications

Devices

The serial port is designed to transmit data on a one device to one device serial communications channel. In the connection between the two devices, the ventilator assumes the “slave” role and responds to commands transmitted to it via the serial port by the external “master.” The serial communications port uses a standard RS-232, null modem, pin configuration. The ventilator assumes the serial communications is set up for:

•19,200 bits/second baud rate

•8 data bits

•no parity bit

•1 stop bit

Connecting Remote Alarm Port

The ventilator is sent commands that are 4 ASCII characters from the external device and responds with a fixed format message. The commands and the responses are specified in Appendix A, “RS-232 Communications Protocol”.

The ventilator is equipped with a remote alarm port enabling ventilator alarm conditions to be sounded at remote locations away from the ventilator. Pressing ALARM SILENCE deactivates the remote alarm. The ventilator signals an alarm using a normally open or normally closed relay contact. The de- energized state of the relay represents an alarm state (any Medium or High Priority alarm) and the energized state represents no alarms.

The remote alarm port is a standard ¼ inch, female, phono jack (ring, tip, sleeve) connector.

Remote alarm

NO Ring

NC Tip

connector & cable

Common Sleeve

Figure 6-2: Remote Alarm Port

The port is configured to work with the Normally Open (NO), Normally Closed (NC), and Respironics (LifeCare) systems. Each requires specific cabling identified in Table 6-1:.

6-2

Respironics V200 Ventilator Operator’s Manual

REF 1057983 A

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Philips V200 manual Connecting Serial Communications Devices, Connecting Remote Alarm Port

Models: V200