Teledyne 7500ZA - Infrared Gas Analyzer - Manual (Page 33)

NDIR Gas Analyzer Instalation
Teledyne Analytical Instruments 17
(2) Analog output signal: Analog output connector (A/O)
Output signal : 4 to 20 mA DC or 0 to 1 V DC (selected when
ordering) Minus lines for the insulation and signal
are common from the ground and internal circuit.
Allowable load : 4 to 20 mA DC, 550Ω or less
0 to 1 V DC, 100kΩ or more
The analog output signals of the instrument are not isolated
individually. It is recommended to isolate the signals individually to
eliminate the interference from unwanted signals or other external
interference, especially if the cable exceeds 30 meters or leads to
outdoors.
(3) O2 Sensor Input: External input connector (A/I)
Input signal:
External zirconia O
2
sensor: Zirconia O
2
sensor signal (Fuji ZFK7
output)
External O
2
sensor: 0 to 1 VDC (DC input resistor of 1MW or
more)