Dwyer SCC-L1 - Manual

Model SCC-LI Single Channel Module
NOTE
:
THIS IS A FACTORY CONFIGURED UNIT
SCC
OPEN SIGNAL Family
Each SCC-LI unit is configured and calibrated at
the factory for the input signal range and voltage
output range printed by the factory on the MSC
unit’s side-label.
The unit may be reconfigurated to accept a 4 to
20mA input signal and provide an isolated 0 to
10V, 0 to 20mA, or 4 to 20mA output signal.
Unit re-configuration requires Dwyer’s SC Con-
figuration Utility.
This SCC unit may be reconfigured by a user at
any time via their personal computer (PC) or
handheld personal computer (HPC) by installing
Dwyer Instrument’s Windows®/PC or Windows®/
CE HPC based SC Configurator Utility, interfac-
ing the SCC unit to the computer’s RS-232C
comm port with an SCC Configuration Cable, and
then changing the unit’s input/output configura-
tion settings.
FACTORY CONFIGURATION
• 15 - 32VDC, 50mA external supply volt-
age
Mandatory:
Optional:
• SC Configuration Package (Part No. SCC-
CC-A1) Package consists of: SC
Configurator Utility and SCC Configura-
tion Cable.
REQUIREMENTS
The SCC family of single channel signal condi-
tioning and isolating modules are intelligent, user
programmable, high-accuracy, user friendly, sig-
nal conditioning units.
Each SCC model supports a one (1) specific ana-
log signal-type on its input channel and outputs
one (1) high-level current or voltage signal de-
pending upon model. A diverse SCC model family
permits users to select the model which meets
their unique signal conditioning needs.
OPERATIONAL DESCRIPTION
INSTALLATION
1
4
3
2
6
5
GREEN LED
RED LED
CABLE
PORT
TERMINAL
BLOCK
ENCLOSURE
ENCLOSURE
COVER
SNAP-ON TAB
(COVERS COMM CABLE PORT)
SNAP-ON TAB
(TERMINAL MARKERS)
WIRING
TERMINALS
TERMINAL
SET SCREW
1 . Mount SCC unit on standard TS32 or TS35
DIN rail.
2. See wiring diagram on reverse side. Connect
external 15 to 32VDC power source to MSC unit:
Positive (+) to SCC terminal +VDC
Negative (-) to SCC terminal -VDC/-OUT
SCC models may be purchased with a factory pre-
set configuration for plug-n-play application or
custom configured to meet their unique need. All
SCC models may be configured/reconfigured by a
user at anytime through use of an optional SC
Configuration Utility.
Theory of Operation - An analog world input
signal arriving at the SCC unit is isolated, filtered,
amplified, scaled and/or linearized (as required) by
the units onboard microprocessor under the direc-
tion of the unit’s configuration parameters set by
the user (or factory) via Windows®/PC or Win-
dows®/CE HPC (Handheld Personal Computer)
based SC Configurator Utility.
The conditioned signal is then converted to a high
level analog current or voltage output signal (de-
pending upon model) and presented at the unit’s
isolated output.
DIAGNOSTIC TOOLS
Two LEDs one RED and one GREEN are located
on the front face of the MSC’s enclosure and
provide user with visual indication as to unit op-
eration.
LED FUNCTIONALITY
GREEN = ON
Meaning: Input Circuit is ON
RED = ON
Meaning: Output Circuit is ON
All other combinations indicate the unit is not operat-
ing correctly.
3. Connect input current device to SCC unit:
Positive (+) to SCC terminal +LOOP IN
Negative (-) to SCC terminal - LOOP OUT
4 . Connect output actuator/device to SCC unit:
Positive (+) to SCC terminal +OUT
Negative (-) to SCC terminal -VDC/-OUT
5 . Connect Digital Enable to SCC unit:
Dig. En. Positive (+) to SCC terminal
DIG EN
Dig. En. Negative (-) to SCC terminal
-VDC/-OUT
A Digital Enable input signal allows the user to
Enable or Disable the OUTPUT signal through
the use of an external control signal. This feature
makes it possible to connect several output sig-
nals to a single data acquisition input.
Providing a DC voltage of between 2 and 32 volts
across SCC unit terminals 1 (-) and 6 (+) places
the module’s output circuit to the OFF state. A
voltage of between 0 and 1.5 volts across these
terminals places the output circuit to the ON state.
If the user does not require this feature do not
connect up the Digital Enable circuitry.
Digital Enable Description: