Mallinckrodt NPB-190 Instrukcja Operatora Pobierz pdf (Strona 78)

Appendix B: Data Port Protocol

If battery power is disconnected or depleted, trend data and user

settings will be lost. All data is stored with error detection

coding. If data stored in memory is found to be corrupted, it is

discarded.

NURSE CALL

The NPB-290 provides two different types of nurse call

interfaces; an RS-232 level and relay closure. The RS-232 level

nurse call function only operates when the monitor is connected

to AC power. It will not operate when running on battery. The

relay-based nurse call function is available when the monitor is

operating either on AC power or when powered by battery.

The remote location is signaled anytime there is an audible alarm.

If the audible alarm has been turned off, or silenced, the nurse call

function is also turned off.

Pin 11 on the data port is the RS-232 level nurse call signal and

pin 5 is ground (see Table B1). When there is no alarm

condition, the voltage between pins 10 and 11 is -5 to -12 VDC.

Whenever the monitor is in an alarm condition, the output

between pins 10 and 11 is +5 to +12 VDC.

Pins 7 and 15 provide a relay that closes when an alarm is

sounding on the monitor. Pins 8 and 15 provide a relay that

opens when an alarm is sounding. Pin 15 is a common lead for

both relays.

ANALOG OUTPUTS

The NPB-290 data port also provides analog voltage outputs

between pins 6, 13, 14, and ground (pin 10). The voltage

represents a specific measured parameter’s current value. The

voltage differential varies proportionally from 0 to 1 volt as the

pin’s parameter varies over its full range of values, as indicated in

Table 4.

1 2 ... 73 74 75 76 77 78 79

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Mallinckrodt NPB-190 Instrukcja Operatora Strona 78