Hach AS950 AWRS Manual De Instrucciones página 17

Figure 11 Auxiliary connector
Pin Signal Color
1 +12 VDC White
power
output
2 Common Blue
3 Pulse input Orange This signal is a sample collection
or Analog
input
4
The wire color refers to the colors of multi-purpose cables (8528500 and 8528501).
5
All mains powered equipment that connects to the controller terminals must be NRTL listed.
6
Long-term operation in this state voids the warranty.
7
Source impedance of the driving signal must be less than 5 kΩ.
Table 1 Half cable wiring information
4
Description
Power supply positive output.
Only use with pin 2.
Negative return of power supply.
When the power supply is used,
pin 2 is connected to earth
5
ground .
trigger from the flow logger (pulse
or 4–20 mA) or a simple floating
(dry) contact closure.
Rating
Battery power to the I/O module: 12 VDC
nominal; Power supply to the I/O module: 15 at
1.0 A maximum.
Pulse input—Reacts to a positive pulse with
respect to pin 2. Termination (pulled low): pin 2
through a series 1 kΩ resistor and 10 kΩ
resistor. A 7.5 zener diode is in parallel with the
10 kΩ resistor as a protection device.
Analog input—Reacts to the analog signal that
enters pin 3 and returns on pin 2. Input burden:
100 Ω plus 0.4 V; Input current (internal limit):
6
40 to 50 mA maximum
Absolute maximum input: 0 to 15 VDC with
respect to pin 2.
Signal to make the input active: 5 to 15 V
7
positive-going pulse with respect to pin 2,
50 millisecond minimum.
English 17