Philips V24CT User's Reference Manual page 334

Controls and Connectors
(1) Rack Connector
(2) ECG Output
(3) Module Connectors
Connectors of The connectors on the front panel of the computer module are:
the M1046A
Computer
Module
11-18 Monitor Installation and Patient Safety
1. Rack Connector; female interface connector used to connect a
satellite rack to the computer module.
2. ECG Output; used to output an ECG wave to synchronize a
defibrillator and provide an input for the defibrillator marker
signal.
3. Plug-in Module Connectors; female plug-in module connectors,
used to input the information from the plug-in modules to the
integral rack.
Maximum Voltages
60 V
3.2 V p-p
60 V