Teledyne 7500 - Infrared gas analyzer - operating manual - Manual (Page 17)

17 Model 7500 Instruction Manual
Teledyne Analytical Instruments
(4) Contact input (DI): terminal block 2 (13 to 20), terminal block 3 (5 to 10)
• It is for a contact input at no voltage. An input is provided when switching to short circuit (on) or
open (off).
• No voltage is applied to the terminals
(5) Contact output (DO): terminal block 3 (13 to 20), terminal block 4 and terminal block 5
• Contact rating: 250VAC / 2A, load resistance
• An output is for a relay contact output. An output is provided when switching to conductive (on)
or open (off).
Note: The wires of analog output signals, O2 sensor input and contact input should be fixed separately
from power supply wiring and contact output wiring.
(6) Communication interface: connector 2
• Please refer to the manual for communication function.