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4.0 TERMINAL MODULE
4.1 The Terminal Module is made to be rail mounted and is the point of interface between the field
sensor wiring and the DE-2500 control system. A removable dual terminal strip is used for the
connection of the system to the equipment mounted discrete sensors which may consist of
up to 16 normally open or normally closed switches as well as 14 analog transducers. The
16 discrete sensor inputs are similar to previous Altronic DA, DD, and DE annunciator
systems and are numbered in the typical annunciator format as 10-17, 20-27. The 14 analog
inputs are numbered 30-37 and 40-45 and accept industry standard transducer signals in the
range of 0-5 VDC. Connections from the Terminal Module to the Display Module are made
using the 693115-x series Cable Assembly.
44.2 The DE-2500 is designed to operate with industry standard, voltage or current amplified
output transducers in the range of 0 to 5 Vdc or 0 to 25 mA. Four series of transducers are
available from Altronic: pressure transducers 691201-x, 691204-x and temperature
transducers 691202/203-300, 691212/213-450.
4.3 PRESSURE TRANSDUCERS - The pressure transducers, Altronic P/N 691201-x and P/N
691204-x, are packaged in a rugged sealed case with a NPT pressure port, a corrosion
resistant media cavity, and a Packard Electric “Metri-Pack” connector. The ranges available
are 0-100, 300, 500, 1000, 2000, and 5000 PSIG for the 691201-x series and 0-50,100, 300,
500 PSIA for the 691204-x series, all of which have an overload rating of 1.5 times full scale
without damage. The three wires from the transducer are: +5 volt excitation, +0.5 to 4.5 volt
output, and minus return. These three wires connect directly to the back of the Terminal
Module using cable assembly P/N 693008-x.
4.4 DIFFERENTIAL MEASUREMENTS - On DE-2500 systems above serial number 1525 and
programmed using Terminal Software version 2.0 or above, differential pressures or
temperatures may be measured by using two consecutive channels. The transducers used
to measure differential values must be of the exact same type and range. The first channel
of the pair will display the basic parameter it is monitoring and the second channel of the pair
will display the numeric difference in engineering units of its value subtracted from the first
channel’s value. Setpoints for each channel monitor the displayed value of that channel.
4.4 TEMPERATURE TRANSDUCER - The temperature transducers, Altronic P/N 691202-300,
691203-300 with a temperature measurement range of +5 to 300°F and the 691212-450,
691213-450 with a temperature range of -40 to +450°F are packaged in a sealed, stainless
steel housing with a 5/8"-18 UNF threaded body, and a Packard Electric “Metri-Pack”
connector. During configuration the standard calibration for the 691202/203-300 sensor is
selected as "dEG1" and the standard calibration for the 691212/213-450 is selected by
choosing "dEG2". The three wires from the transducer are: +5 volt excitation, temperature
output voltage, and minus return. These wires connect directly to the Terminal Module using
cable assembly P/N 693008-x.
4.5 THERMOCOUPLE INPUTS - The Terminal Modules above serial number 1525 and
programmed using Terminal Software Program version 2.0 or above can also accept industry
standard type “J” or “K” thermocouples on inputs 37 - 45. Automatic cold junction
compensation is built-in. The units can be configured to °F or °C. Both a high and low
setpoint is associated with each channel. The monitor can read type J thermocouples
between -76°F and +1382°F (-60°C and +750°C) and type K thermocouples between -76°F
and +1472°F (-60°C and +800°C).
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