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Connecting To The Nurse Call Relay; Modification For Nurse Call Alarm Relays - Philips M3001A Service Manual

M3/m4 monitors,measurement server,measurement server extensions.
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Connecting to the Nurse Call Relay

Step 1
Step 2
Connecting to the Nurse Call Relay
The nurse call relay is a 3.5mm, mono phone jack socket. It is completely isolated from the
rest of the circuitry. Under normal conditions, the tip and sleeve are "open" (not shorted
together). When an alarm is indicated, the tip and sleeve are shorted together by a relay.
Do not rely exclusively on the Nurse Call Relay for the notification of alarm conditions.
The relay output cannot be checked by the Monitor, and the Monitor cannot notify the
user of any failure of the relay.
See the specifications for the Nurse Call Relay in the Monitor and Measurement Server
Specifications chapter of the Instructions for Use, and the documentation for the device you
are connecting.

Modification for Nurse Call Alarm Relays

Some customers may want to have an Open-On-Alarm relay instead of a Closed-On-Alarm
for their Nurse Call system. Qualified Philips service personnel can modify the connector
board, part number M3046-66522.
The modification should be done only on request, in the field. All factory supplied connector
boards or monitors have the original board including the Close-On-Alarm Relay.
To make the Open-On-Alarm relay modification, complete the following steps:
Press and hold the mount latch toward the clamp screw.
Rotate the Measurement Server and mount until you get it to the position you want.
Release the mount latch, and make sure it is clicked into one of the four slots on the
back of the mount.
Installing the Instrument


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