Cable Connections
114 Chapter 9 - RS-232 Interface
Cable Connections
The 9-pin connector mounted on the rear panel provides an access port for a
serial (RS-232) interface to a suitably configured personal computer. Or,
alternatively, qualified service personnel can use the connector to send a
Nurse Call signal.
Nurse Call
Pin 9 of the RS-232 serial interface connector provides an Alarm Out
signal. Any time there is any alarm condition active in the monitor, pin 9 goes
to plus RS-232 level voltage (> +5 VDC), if
Nurse Call Signal is set
to
ON in the Set-up Menu. Any time there is no active alarm condition, pin 9
is at minus RS-232 level voltage (< –5 VDC).
The
ALARM SILENCE button does NOT deactivate the Nurse
Call Signal.All alarm conditions must cease before the signal level
returns to minus RS-232 level voltage (–5 VDC).
If in the Set-up Menu
Nurse Call Signal is set to OFF, pin 9 is
always be at the minus RS-232 level voltage. In order to make use of the
Alarm Out signal, pin 9 should be connected to a high-impedance circuit
(>1000) and protected against transient voltages.
Pin # Signal Direction
1 not used
2 Rx data input
3 Tx data output
4DTR output
5 Signal Ground input/output
6 DSR input
7RTS output
8 CTS input
9Alarm Out output
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