CENTRALINE I/O MODULES – INSTALLATION & COMMISSIONING INSTRUCTIONS
EN1Z-0973GE51 R0119
24
Internal Impedance when Connecting Sensors
24.9 kOHM
RTD
10 VDC
AI
GND
Fig. 30. Analog input low impedance (input circuit for
PT1000, Johnson A99 PTC, Balco500, PT3000,
NI1000TK5000, slow binary input)
199.9 kOHM
V
i
AI
GND
Fig. 31. Analog input high impedance (input circuit for
voltage input for active sensors)
199.9 kOHM
(8.9 VDC IF
CONNECTION
INTERRUPTED)
V
i
AI
GND
24.9 kOHM
10 VDC
Fig. 32. Analog input impedance setpoint (input circuit
for NTC10kΩ, NTC20kΩ, wall module setpoint)