EPC-250 IOI 6-18 All rights reserved © ALTRONIC, LLC 2018
7
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
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 re-
turn. These wires connect directly to the terminal board using cable assembly
P/N 693008-x.
4.5
Thermocouple Inputs
The terminal board can accept industry standard type J or K thermocouples.
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).
4.6
N/O and N/C Inputs
The inputs can also accept standard normally-open and normally-closed con-
tacts. Refer to figure 2 for proper wiring of these types of inputs.
4.7
4-20mA Inputs
The terminal board can accept 4-20mA inputs by selecting the internally con-
nected 200 ohm resistors, creating a termination voltage of .8 to 4.0 volts.
The jumper wires between the + and – terminals for that channel must be
connected for proper operation.
4.8
For each input, the corresponding CHANNEL SWITCH must be set according
to the input type. Switches are turned ON by moving them toward the ANA-
LOG OUT labeling.
4.9
Digital outputs 1 through 8 turn on to common ground when closed. Outputs
1 through 8 are rated at 500mA, 60V.
5.0 HAZARDOUS AREA OPERATION
5.1
The EPC-250 is CSA certified for CLASS I, DIVISION 2, GROUPS C and D
areas, when mounted in a suitable enclosure.
In addition, the following requirements must be met (refer to NFPA standard
No. 493):
The low voltage sensor switch wires within the panel enclosure must
be kept at least two (2) inches away from other wiring. Run the sen-
sor switch wires leaving the panel in a separate conduit from all other
wiring and keep them separate.
Wiring to the sensors must have a grade of insulation capable of
with- standing an AC voltage of 500 volts RMS.
Sensor wires must be run in separate conduits and junction boxes
from high voltage wires such as ignition, fuel valve, and other high
voltage wiring.
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
EACH SET SWITCH MUST BE
SET FOR PROPER OPERATION
ANALOG
DEG1
DEG2
NO/NC
DIGITAL
INPUT
J/K
THERMO-
COUPLE
4-20mA
INPUT
