Leds; Configuring The Inputs - Phonetics SENSAPHONE EXPRESS II User Manual

0-5 Volts - This configuration connects the input signal directly to Express II's analog to digital
converter for measuring the output of 0 to 5V transducers. Any sensor that puts out 0-5V can be
wired. Any input range can be specified by the user. Typical sensors include pressure gauges,
voltage meters, and flow meters. Express II can read the voltage between 0 Volts and 5 Volts in
increments of .00122 Volts. Input resolution is 12 bits.
Thermistor - Two kinds of thermistors may be used with Express II: a 2.8K thermistor or a
10K thermistor. The range for an input measuring temperature for 2.8k is –65.0° to 93.33°C
(–85° F to 200° F), and for 10k is –62.22° C to 148.89° C (–80° F to 300° F) . This configuration
type connects the input signal to a 5V reference through a 6.34K pull-up resistor.
Time accumulator - The time accumulator works only with N.O. Dry Contacts. As the name
suggests, it will accumulate and tally the total amount of time--in hours, minutes, and seconds--
that the input sensor is in the closed position. This would be useful, for instance, in maintaining
total run time for a given device.

LEDs

Each input has a corresponding LED that indicates input status. The LEDs are located above
the terminal block. When an LED is steady green , that indicates that the input is OK and no
alarms exist. When an LED is blinking green , the input is in alarm condition, but the preset
recognition time has not been met to qualify as an unacknowledged alarm. When an LED is
blinking red , that indicates that an unacknowledged alarm exists on the corresponding input.
When an LED is steady red , it indicates that an alarm has been acknowledged but still exists on
the corresponding input. If the input is disabled, the LED goes off for that input. NOTE: If the
LED changes from blinking green directly to steady red, the input is not set up properly to dial
out with an alarm.

CONFIGURING THE INPUTS

Each of the inputs must be configured so that Express II will know what type of signal it must
read. To configure the inputs, you must position the shunts that are located on the input card
directly above the input terminal block. The inputs may be set in one of three configurations:
1. 4-20mA
2. Thermistor, dry contact, or pulse
3. 0-5V
1. To configure the input as 4-20mA, place the shunt to enclose the two bottom pins (B position).
2. To configure the input as thermistor, dry contact, or pulse, place the shunt to enclose the two
top pins
(A position).
3. To configure the input as 0-5V, remove the shunt.
See Figure 4:
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10 Sensaphone Express II User's Manual