IntelliPack Series 841T Transmitter/Alarm User's Manual Frequency Input
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5.0 SERVICE AND REPAIR
CAUTION:
Risk of Electric Shock - More than one
disconnect switch may be required to de-energize the
equipment before servicing.
SERVICE AND REPAIR ASSISTANCE
This module contains solid-state components and requires no
maintenance, except for periodic cleaning and transmitter
configuration parameter (zero, full-scale, setpoint, deadband, etc)
verification. Since Surface Mounted Technology (SMT) boards
are generally difficult to repair, it is highly recommended that a
non-functioning module be returned to Acromag for repair. The
board can be damaged unless special SMT repair and service
tools are used. Further, Acromag has automated test equipment
that thoroughly checks and calibrates the performance of each
module. Please refer to Acromag’s Service Policy Bulletin or
contact Acromag for information on service parts and repair.
PRELIMINARY SERVICE PROCEDURE
Before beginning repair, be sure that all installation and
configuration procedures have been followed. The unit routinely
performs internal diagnostics following power-up or reset. During
this period, all LED’s will turn ON momentarily, and the green
“Run” LED flashes. If the diagnostics complete successfully, the
“Run” LED will stop flashing after approximately one second and
remain ON. This indicates that the unit is operating normally. If
the “Run” LED continues to flash, then this is indicative of a
problem. In this case, use the Acromag IntelliPack Configuration
Software to reconfigure the module or download its firmware and
this will usually cure the problem. If the diagnostics continue to
indicate a problem (a continuously flashing green LED), or if other
evidence points to a problem with the unit, an effective and
convenient fault diagnosis method is to exchange the
questionable module with a known good unit.
The IntelliPack Serial Port Adapter also contains a red LED
visible at the small opening in the enclosure to the right of the
RJ11 receptacle. If this LED is OFF or Flashing and power is
ON, then a communication interface problem exists. Note that
the adapter receives its power from the IntelliPack module. A
constant ON LED indicates a properly working and powered
serial interface adapter.
Acromag’s Application Engineers can provide further
technical assistance if required. When needed, complete repair
services are available from Acromag.
6.0 SPECIFICATIONS
841T-1500-C
, Frequency/Pulse Input, I/V Output, SPDT Relay
841T-0500-C
, Frequency/Pulse Input, I/V Output
General:
The IntelliPack Model 841T-0500 is a DC-powered
transmitter which conditions a single frequency or pulse count
input, and provides an isolated voltage or current output.
Isolation is supplied between the sensor input, the output,
and power. The 841T-1500 adds a SPDT, Form C, electro-
mechanical relay, which provides a local limit alarm function
with isolated relay contacts. This transmitter/alarm is DIN-rail
mounted.
The unit is configured and calibrated with our user-friendly
Windows 95
or NT
IntelliPack Configuration Program.
Push-buttons on the module allow adjustment to the zero and
full-scale points for the transmitter, plus setpoint and
deadband adjustment for modules with the alarm option. All
calibration and configuration information is stored in non-
volatile reprogrammable memory in the module.
MODEL NUMBER DEFINITION
Transmitters are color coded with a white label. The prefix
“8” denotes the IntelliPack Series 800, while the “T” suffix
specifies that this device is primarily a process transmitter.
841T:
Transmits and isolates a single frequency or pulse
counting input.
-X500:
The four digits of this model suffix represent the following
options, respectively:
X = 1 with Alarm Relay, X = 0 without Alarm Relay;
5 = Output: Transmitter Voltage or Current;
0 = Enclosure: DIN rail mount;
0 = Approvals: cULus Listed.
INPUT SPECIFICATIONS
Unit must be wired and configured for the intended input type
and range (see Installation Section for details). The following
paragraphs summarize this model’s input types, ranges, and
applicable specifications.
Frequency Input:
Select 0 to 100.00Hz, 0 to 1000.0Hz, or 0 to
50KHz. Unit accepts unipolar or bipolar (zero crossing) input
signals. Frequency is accurately measured to a minimum of
1Hz (50KHz range), or 0.5Hz (100Hz & 1KHz ranges).
Unmeasurable input frequencies below 1Hz are represented
as 0Hz. Status LED will flash if input frequency is
unmeasurable (below 1Hz), or if the signal amplitude is
insufficient for detection.
Pulse Counter Input:
100Hz maximum counting rate. Minimum
pulse width is 5ms (5ms ON and 5ms OFF for 10ms period or
100Hz). Pulse count range is 0 to 65535 pulses. Unit
accepts unipolar or bipolar input pulses and samples the
input at a 1.2ms rate.