Figure 11 Auxiliary connector
Table 1 Half cable wiring information
Pin Signal Color
4
Description Rating
1 +12 VDC
power
output
White Power supply positive output.
Only use with pin 2.
Battery power to the I/O module:
12 VDC nominal; Power supply to the
I/O module: 15 at 1.0 A maximum.
2 Common Blue Negative return of power
supply. When the power
supply is used, pin 2 is
connected to earth ground
5
.
3 Pulse input
or Analog
input
Orange This signal is a sample
collection trigger from the
flow logger (pulse or
4–20 mA) or a simple floating
(dry) contact closure.
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): 40 to
50 mA maximum
6
Absolute maximum input: 0 to 15 VDC
with respect to pin 2.
Signal to make the input active: 5 to
15 V positive-going pulse
7
with respect
to pin 2, 50 millisecond minimum.
4
The wire color refers to the colors of multi-purpose cables. Refer to Accessories—refrigerated
sampler and AWRS on page 31.
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.
English 17
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