Philips Avalon CTS M2720A, Service Manual

Page: 96 / 110

10 Specifications Cables
90
Cables
ECG Frontend Type Two Lead ECG
Input Impedance > 10M

@ 35 Hz
CMRR > 110 dB
(with 51.1 kW || 47nF imbalance @
line frequency)
Noise < 4

Vp @ 25 k

input impedance
Contact Potential ± 500 mV
Inop Amplitude at open LA/ RA contacts 60 to 90 mV
Inop Auxiliary Current < 100 nA
Input Voltage Range ECG 20

Vpp to 4 mVpp (66dB)
Input DC tolerance ± 400 mV
Dielectric Strength 1500 Vrms
Frequency passband 0.7 to 80 Hz
Defibrillator Protection None
ESU Protection None
AUX Frontend Communication Protocol Serial, 1 start bit, 1 stop bit, 8 data bits,
no parity
Serial Communication Voltage Levels Unipolar 3 V
Receive: mark = 0V, space = ~3 V
Transmit: mark = 0 V, space = high
impedance (requires pull up resistor)
Communication Speed fixed 1200 Baud
Max. Output Current for External Devices 100 mA electronically limited
Output Voltage for External Devices 3 V ± 2%
Cable Type Option Number Part Number Length
Avalon Fetal Monitor Interface Cable
(for monitors with software revision
D.00.00 or greater) M2720A option K30 M2731-60001 2.5 m approx.
Series 50 Interface Cable M2720A option K50 M2720-61603 1.6 m approx.
Service Tool Cable - M1360-61675

3.0 m
Power Cable - Country dependent

2.4 m
Frontends