|
|
|
|
DIN Rail with Multi-Channel Isolators | Output Loop Powered
|
Click for larger image. |
|
|
|
|
|
|
The DRI-LPO Series are DIN rail mount, DC input,
single or dual channel, isolating two-wire transmitters.
Each channel accepts a DC voltage or current input and
provides an isolated 4 to 20 mA output. Each channel
is fully isolated (1800 Vdc) from input-to-output and
channel-to-channel.
All DRI-LPO Series modules feature plug-in screw
terminals for easy installation and low Mean-Time-To-
Repair (MTTR). Two or more modules can slide together
and interlock for solid, high density mounting. This is
accomplished by removing either the foot, or the adjacent
unit’s faceplate (for right-hand side or left-hand side
mounting, respectively). The module to be attached will
easily slide on to the side of the mounted unit.
DC input, two-wire transmitters are used to isolate and
convert a DC voltage or current into a proportional 4 to
20 mA signal. Two-wire transmitters are primarily used
in remote locations near the sensor since they reduce
the probability of signal errors and save wiring costs
by utilizing the two power wires to send the 4 to 20 mA
signal. The current signal is usually monitored by a
control system or displayed for an operator.
Typically, DC voltages or currents from various
field instruments (e.g. level, flow, pressure and
position sensors) are used to monitor and control a
manufacturing process. Voltage signals can only run
a short distance to a panel without errors caused by
noise or lead resistance in the wires. These sensor
(voltage) signal wires are usually terminated at the
two-wire transmitter and converted into a 4 to
20 mA signal which is highly immune to noise and not
affected by lead resistance, both of which can cause
significant errors in voltage signals transmitted over
long distances. The 1800 Vdc isolation capability of the
DRI-LPO Series prevents ground loops from causing
errors in DC voltage or current signals and can reduce
susceptibility to radio frequency interference (RFI).
Isolation also provides protection from high voltages
and current spikes which can damage expensive
supervisory control and data acquisition (SCADA)
equipment, such as a PLC or DCS.
The DRI-LPO Series operates as a two-wire
transmitter; each channel derives its power from a
12 to 35 Vdc source connected in series with the 4 to
20 mA output loop. Typically a 24 Vdc source is used
for power, allowing 12 Vdc (600 Ω @ 20 mA) for other
devices connected in series in the current loop. The
outputs of the DRI-LPO Series are isolated from the
inputs and protected from reverse polarity. Zero and
span pots are provided for each channel to calibrate
the output to the input source (±5%). Standard input
ranges are calibrated to rated accuracy. One range per
module; one or two channels per module.
Specifications
INPUT
DRI-LPO-MA: 1 channel, 4 to 20 mA input
DRI-LPO-2MA: 2 channels, 4 to 20 mA input
DRI-LPO-V: 1 channel, 0 to 10V input
OUTPUT
DRI-LPO-MA, DRI-LPO-V: 1 channel, 4 to 20 mA output
DRI-LPO-2MA: 2 channels, 4 to 20 mA output
Impedance: ≥100 kΩ (voltage input); ≤20 Ω (4 to 20 mA input)
Protection: Withstands up to 24 Vdc (current input), 120 Vac
(voltage input) without damage
Supply Voltage Range: 12 to 35 Vdc, each channel
Output Accuracy: ≤0.1% of full-scale input typical, ≤0.2%
max @ 23°C including linearity, repeatability and hysteresis
Adjustability: Front accessed 10 turn pot, ±5% of span for
zero and span, typical
Stability: ≤0.025%/°C of full-scale maximum
ESD Susceptibility: Meets IEC 801-2 level 2 (4kV)
Isolation: 1800 Vdc or peak AC between input and output and channel-to-channel
Response Time: 100 msec typical (10 to 90%)
Temperature:
Operating: -40 to 80°C (-40 to 176°F)
Storage: -40 to 80°C (-40 to 176°F)
Humidity (Non-Condensing): 15 to 90% RH @ 45°C (113°F)
Wire Terminals: Socketed screw terminals for 12 to 22 AWG
Weight: 154 g (0.34 lb)
|
| |
|
|
|
|
|
† All dollar amounts on this site are shown in US currency.
|
|
|
|
|
| |
Related Links -
Related Products
|
Related Products |
|
DRI-LPI: |
Input Loop Powered DIN Rail Multi-Channel Isolators |
|
|
|
|
|
|