The DRF series DIN rail signal conditioners are
designed to accept a broad range of input signals,
such as ac and dc voltage and current, frequency,
temperature (thermocouple and RTD), and process
transducers, and provide standard process outputs
of either 4 to 20 mA, or 0 to 10 Vdc. The DRF series
feature a modern housing design, that is easily
mounted on standard 35 mm DIN rails. Connections
are safely and securely made through pluggable
screw terminal connectors, with input and output
connections on the opposite sides of the module.
The DRF series are designed to maximize functionality.
The front door of the housing provides easy access to
span and offset potentiometers which may be used to
field adjust the input and output signal range.
The input, output and power circuits are isolated by
3500 volts of galvanic isolation. The isolation protects
against potentially damaging voltages from passing
through the signal conditioners into connected systems.
The isolation also provides improved measurement
accuracy by minimizing the effects of ground loops and
Each DRF series signal conditioner is available with
current and voltage output (only one may be used at a
time). Available output types include 4 to 20 mA or 0 to
10 Vdc. Although pre-configured before shipping from
the factory, the output may be changed through an
internal jumper change.
Standard outputs are linear and proportional to the
signal input. Thermocouple input modules feature
special circuitry to linearize the output to the actual
temperature rather than the non-linear signal produced
by thermocouple sensors.
For Ordering details and technical information on specific models please see the Related Links section below.
Common to all Models)
Power: 24 Vdc ±10%, 230 Vac ±10% 50/60 Hz,
115 Vac ±10% 50/60 Hz Power Consumption: <3.8 VA Output: 4 to 20 mA and 0 to 10 Vdc Maximum Voltage Output: 11 Vdc approx. Minimum Voltage Output: -1 Vdc approx. Minimum Load Resistance (Voltage): =1 K Ω Maximum Current Output: 22 mA approx. Maximum Current Output: -1.5 mA approx. Maximum Load Resistance (current): =400 Ω Accuracy: <0.2% or <0.3% depending on model Linearity: <0.1% or <0.2% depending on model Thermal Drift: <150 ppm/°C or 250 ppm/°C typical
depending on model Response Time: 70 mS (Process and DC input
models); 250 mS (Temperature and AC input models)
Input to Output: 3500 Veff; Power to Input: 3500 Veff; Power to Output: 3500 Veff (for ac powered models),
1K Veff (for dc powered models)
*tested True RMS, 60 sec. leak <1 mA Electrical Connections: Plug-in screw terminals Protection: IP-30
Weight: (DC Powered): 120 g (4.2 oz) (AC Powered): 200 g (7 oz)
Dimensions: (DC powered models):
110 H x 22.5 W x 93 mm D (4.3 x 0.9 x 3.7") (AC powered models):
110 H x 37 W x 93 mm D (4.3 x 1.46 x 3.7")
Operating Temperature: 0 to 60°C (32 to 140°F) Storage Temperature: -20 to 70°C (-4 to 158°F)
† All amounts shown in USD Note: * Specify Power, 24Vdc for 24 Vdc power, 115Vac for 115 Vac power or 230Vac for 230 Vac power ** Specify range code from the Input Range Table *** Specify output, 4/20 for 4 to 20 mA output or 0/10 for 0 to 10 Vdc output