Ohmeda Ohio 2000 IWS Series, Operation And Maintenance Manual

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A-12
6600-0255-000 12/20/00
Appendix
A-12
alrmleds
This series of bits represents the alarm LEDs. If an LED is illuminated, the correspond-
ing bit is set to 1 (alarm active). If there is no alarm, the bit is set to 0. Checking the bits
from right to left is the same as checking the alarm LEDs from top to bottom:
00000100
Probe Failure Alarm
Patient Temperature Alarm
System Failure Alarm
Heat Off Alarm
Check Patient Alarm
Reserved
Power Failure Alarm
Audible Alarm Status Bit
code
This is the error code that appears in the control temperature display during a system
failure alarm (e.g. E014). If the system is operating normally (no system failure), zeroes
replace the error code (e.g. E000).
ck
This is the two byte ASCII representation of the byte that when added to the sum of all
the ASCII data bytes in the string equals zero. Note that all over flows are dropped and
the sum of the data bytes DOES NOT INCLUDE the <stx>, checksum, <etx>, <cr>, or
<lf> characters or the parity bit of each byte.
<cr>
Carriage return character.
<lf>
Line feed character.
<etx>
End of transmission character (ASCII 3) or CTRL B.
Nurse Call specifications
Contact ratings
Maximum resistive load: 4 VA
Maximum DC switching voltage: 100 Vdc
Maximum switching current: 0.25 A
Maximum carrying current: 0.50 A.
Connector
The Nurse Call contacts and the serial data output share the same female, nine pin, d-
type connector (DB9F).
Pin 6: Closed contact under normal conditions, i.e. power on, no alarm
(recommended configuration)
Pin 1: Common contact
Pin 9: Open contact under normal conditions, power on, no alarm
These contacts are not powered. They only provide closure.