IntelliPack Series 812A/811A Alarm User's Manual Dual & Single DC Voltage/Current Inputs
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The module uses a high-resolution, low-noise, Sigma-Delta
Analog-to-Digital Converter (Σ-∆ADC) to accurately convert the
input signal into a digitized value. User-defined alarm setpoints
are compared to this value and used to control the built-in alarm
relay(s). Each relay may have high or low setpoints plus
deadband. Both the alarm setpoints and deadband may be
adjusted over the full input range of the unit. Relay actuation is
user-selected for failsafe or non-failsafe operation. Relays may
be configured as latching, in which case a push button reset is
required to reset the latch (this may also be accomplished via
software control). Additionally, a programmed relay time delay
may be applied to filter transients and minimize nuisance alarms.
Wide alarm functionality and convenient reprogrammability
makes these alarms extremely powerful and flexible over a broad
range of applications. These models may be configured as limit
alarms, window alarms, on/off controllers, deviation alarms (dual
input models), peak detect alarms, or rate-of-change alarms.
Other functions are possible--please consult the factory.
An optional AC current sensor (Acromag Model 5020-350) is
used in conjunction with the DC current input circuit of the
811/812A to implement an AC current alarm for inputs up to 20A
rms. The optional AC current sensor is itself an isolated,
accurate, toroidal instrument transformer, that outputs a safe,
low-level DC milliamp signal to the input of the alarm. As an
isolated device, it may also be used to facilitate input-to-input
isolation on dual input models. See “AC Current Sensor” section
for more information.
All IntelliPack modules are designed to withstand harsh
industrial environments. They feature RFI, EMI, ESD, EFT and
surge protection, low temperature drift, wide ambient temperature
operation, and isolation from input, to power and relay contacts.
As a wide-range DC-powered device, the unit may be powered
from DC power networks incorporating battery back up.
Additionally, the input power terminal is diode-coupled, providing
reverse polarity protection. This allows the unit to be connected
to redundant power supplies, or several units to safely share a
single DC supply.
Units are DIN rail mounted and removable terminal blocks
facilitate ease of installation and replacement, without having to
remove wiring. Alarm relay and power wiring are inserted at one
side of the unit, while input wiring is inserted at the other side.
Connectors are industry standard screw clamp type and accept a
wide range of wire sizes.
The safe, compact, rugged, reconfigurable, and reliable
design of this alarm makes it an ideal choice for control room and
field applications. Custom alarm configurations are also available
(please consult the factory).
Key IntelliPack 811A/812A Features
•Agency Approvals - CE, UL Listed, & cUL Listed.
•WindowsConfiguration - Fully reconfigurable via our
user friendly Windows 95or NTConfiguration Program.
•Nonvolatile Reprogrammable Memory - This module has
an advanced technology microcontroller with integrated,
non-volatile, downloadable flash memory and EEPROM.
•Convenient Field Reprogrammability - The unit includes
push-button reconfiguration of key alarm functions in
combination with LED indicators to facilitate in-field changes
without having to connect a host computer.
Key IntelliPack 811A/812A Features…continued
•Wide Alarm Functionality - The unit may be programmed
for a wide range of alarm types including limit, window,
on/off controller, deviation (dual input models), peak
detection, and rate-of-change alarms. Other functions are
possible (please consult the factory).
•Flexible DC Current or Voltage Inputs - Accepts process
current (0-24mA), or wide range voltage inputs to ±100VDC.
•Optional AC Current Input - An optional AC current sensor
can be purchased separately to support AC current inputs.
•Wide Ambient Operation - The unit is designed for
operation over wide ambient temperatures.
•Convenient Input Excitation Supply - Each input includes
an excitation supply for operation with two-wire transmitters.
•High-Power SPDT or DPDT Relays - The module includes
either one Double-Pole-Double-Throw (DPDT) electro-
mechanical relay, or two Single-Pole-Double-Throw (SPDT)
electromechanical relays, for switching voltages to 230VAC
at currents to 5A.
•Fully Isolated - Input(s), power, and relay contacts are all
isolated from each other. Dual input units share a common
and do not provide input-to-input isolation.
•Self-Diagnostics - Built-in routines operate upon power-up
for reliable service, easy maintenance, and troubleshooting.
•LED Indicators - A green LED indicates power. A yellow
status LED turns on if input signal is out of calibrated range.
A yellow alarm LED indicates when a relay is in alarm.
These LED’s have other functions in field program mode.
•Wide-Range DC-Powered - This device receives power
over a wide DC supply range and the power terminal is
diode-coupled. This makes the alarm useful for systems
with redundant supplies, and/or battery backup power.
•Hardened For Harsh Environments - The unit will operate
reliably in harsh industrial environments and includes
protection from RFI, EMI, ESD, Surges, and EFT.
•Convenient Mounting, Removal, & Replacement - DIN-
Rail mounting and plug-in type terminal blocks for input,
power, and relay contact wiring makes replacement and
removal easy.
•High-Resolution Precise A/D Conversion - Alarms include
an advanced, high-resolution, low noise, Sigma-Delta
Analog to Digital Converter (Σ-∆ADC) for high accuracy and
reliability.
•Individual Relay Functionality - Each relay of dual relay
units may be programmed for different functions.
•Failsafe or Non-Failsafe Relay Operation - The unit may
be configured for failsafe or non-failsafe relay operation.
•Configurable Setpoint With Deadband - Programmable
deadband is associated with each setpoint to eliminate relay
“chatter” and prolong contact life.
•Configurable Latching or Momentary Alarms - These
alarms may be configured for automatic alarm reset, or
latching alarm with manual push-button or software reset.
•Configurable Relay Time Delay Filters Transients -
Useful for increased noise immunity and to filter transients.
ACCESSORY ITEMS
The following IntelliPack accessories are available from
Acromag. Acromag also offers other standard and custom alarm
and transmitter types to serve a wide range of applications
(please consult the factory).
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