CARDIAC STIMULATOR
ENGLISH Page 45 of 49
Backup Manual Pace Control:
Should the computer fail the Stimulator automatically switches into the Backup Manual Pace mode.
Pacing may then be toggled on/off by pressing PACE ON/OFF button. Note that pulse width is fixed at
2ms.
Pace Output:
Two green LED's marked Atrium and Ventricle light briefly when stimulation pulse is generated The
two LED's labelled Check Lead, signal a high impedance condition during last stimulus pulse, i.e.
programmed current not delivered due to very high impedance. This is usually due to a disconnection
in the circuit or a broken cable/connection.
Emergency Fixed Pace Output:
In the unlikely case of the Stimulus Generator Unit itself failing, i.e. the Stimulator does not pace even
in the BACKUP MANUAL PACING mode and the patient requires urgent pacing, the Operator may
pull out the green plug from the PACE OUTPUT socket and plug it into the red EMERGENCY FIXED
PACE OUTPUT socket to the right of the PACE OUTPUT socket. The pacing lead impedance
automatically turns on the Emergency Fixed Rate Pacing which immediately starts pacing (ventricle
only) at 100bpm, with 5mA current and 2ms duration.
13.2 EPS320 Stimulator Connections
Figure 17 shows the connectors on the rear panel of the Stimulus Generator Unit.
Figure 17 Connectors on rear panel of SGU (reference only)
Power On/Off
This is the main power switch to the Stimulus Generator Unit.
Power Input
External Power input. Connect only to Micropace medical grade power supply, Part No. MP3074. The
unit draws average current of 750 mA with a switch on surge of 1.5A at 15 VDC via a Redel 2 pin
socket.
Computer Link Port
Serial RS232 data link to computer's COM1 Port; DB9 connector. Use only Micropace Serial RS232
Boost Cable (Part No. MP3033A).
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