Rockwell Automation 937CU-AISTR-DC1 User Manual
937CU-AISTR-DC1 Installation Instructions
Strain Gauge Converter
Symbols Used
Warn ing
Warn ing
Attention
Note
Bul. 937C Strain Gauge Converter Installation Instructions
This symbol warns of possible danger.
Failure to heed this warning may result in personal injury or death, or property
damage, including destruction.
This symbol warns the user of a possible f ault.
Failure to heed this warning can lead to total failure of the device and any other
connected equipment.
This symbol draws attention to important information.
1
Safety Notes
Warn ing
Attention
Attention
Attention
Warn in g
Attention
Warn in g
Note
Note
2
Bul. 937C Strain Gauge Converter Installation Instructions
The Frequency Converter with Trip Values must only be operated by trained personnel
in accordance with this handbook.
The protection of operating personnel and of the system is only ensured if the devices
are used in accordance with their intended purpose. Any other type of operation than
that described in this manual places the safety and functionality of the devices and
systems connected to them in question.
The devices may only be installed, connected, and adjusted by electrical professionals
outside the hazardous area.
If faults cannot be elimina ted, the devices must b e taken out of operation and protected
from being placed in service again inadvertently. Tampering with or making changes to
the devices is dangerous and therefore not permitted. They render the warranty void.
The responsibility for the adherence to local safety standards lies with the operator.
Overview
Bul. 937C Strain Gauge Converter Installation Instructions
The devices of the Bul. 937C IS Barriers, Isolators and Converters are used to transmit signals
between field
937 products ar
circuits of these devices are intrinsically safe and are galvanically isolated from the not intrinsically
safe circuits. The devices thus represent an electrical isolation between the hazardous area and
the secure area.
Devices can be used
process control system or the control.
Two different, freely parameterisable trip values
Further information (e. g.
instructions for the Bul. 937 family) can be found on our Internet page www.ab.com.
devices and the process control system or control.
e suitable for connection to field devices in the hazardous area. The field current
for signal transmission between field devices in the secure area and the
Resistance bridges, i. e. strain gauges,
load cells, force transducers, pressure
transducers, torque shafts or similar
devices, can be connected to the input of
the converters .
The 937CU-AISTR-DC1 converts the
input signal into a proportional output
current, which can be forwarded e. g. to a
display unit or an analog input of the
process control system or control. By
means of the two relay outputs.
of the input signal can be monitored.
certificates and the 937CU-AISTR-DC1 data sheet and the operating
3
Bul. 937C Strain Gauge Converter Installation Instructions
Mounting and Connection
The Strain Gauge Converter can be mounted on a 35 mm standard rail corresponding to DIN EN
60175. The devices must be snapped onto the rail vertically, and never slanted or tipped to the side.
The Strain Gauge Converters are constructed in protection class IP20 and must
therefore be protected from undesirable environmental conditions (water, small
foreign objects).
Attention
CORRECT: Device
snapped on vertically.
INCORRECT: Device snapped
on from the side. Can damage
the contacts and cause the
device to fail.
4
Bul. 937C Strain Gauge Converter Installation Instructions
Connection
The Bul. 937 series' slip-off terminals significantly simplify
connection and co
quick and error-free exchange of the unit when service is
needed.
The terminals can be screwed on, are self-opening, and have
generous connection room for a wire diameter of up to 2.5 mm²
and coded plugs, so that leads cannot be confused.
The intrinsically safe field circuit is connected
to
the blue terminals 1 to 6 of the Strain
. auge Converters. This may be conducted
into the hazardous area using DIN EN
60079-14-compliant leads.
The non-intrinsically safe field circuit is
connected to the black terminals 1 to 6 of
the Strain Gauge Converters.
In both cases you can connect:
• a half bridge (terminals 1, 3, 4, 5, 6)
• a full bridge (terminals 1 to 6)
nstruction of switching cabinets. They allow
5
Terminals
Bul. 937C Strain Gauge Converter Installation Instructions
The remaining green terminals have the
following functions:
• Terminals 7/8: current output
• Terminal 9: only for voltage output (see
below.)
• Terminals 10 ... 12: relay 1
• Terminals 13/14: binary input 1
• Terminals 15/14: binary input 2
• Terminals 16 ... 18: relay 2
• Terminals 19 ... 21: RS 485 interface
(deactivated if plug is in RS 232 interface)
• Terminal 22: not used
• Terminals 23/24: power supply 24 V DC
If you connect terminals 7 and 9 by means of a
bridge, a voltage output of - 10 V ... + 10 V
results between this bridge and terminal 8. The
built-in shunt resistance is 500 Ω.
The RS 485 interface is galvanically isolated
from other circuits. It is deacti vated if you plug a
connector into the socket of the RS 232
interface on the front panel of the Strain
Gauge Converters.
Further information on connecting the Strain
Gauge Converters (e. g. on using the Power
Rail) can be found in the data sheet and in the
operating instructions for the Bul. 937 system
on our Internet page www.ab.com.
6
GND
7
8
9
1100
1111
1122
1166
1177
1188
P
21+
N
1920
1
2
3
4
5
6
1133
1144
1155
Binary
inputs
2233
RS 232
RS 485
2244
Bul. 937C Strain Gauge Converter Installation Instructions
Front panel
On the front panel of the
• LED ERR (red) to indicate
a sensor fault (flashes red)
−
− the simulation mode (only when using FDT flashes red)− a
device fault (steady red)
• PWR LED (green), to indicate the presence of the supply voltage
• LED OUT 1 (yellow), to indicate that relay 1 is active
• LED OUT 2 (yellow), to indicate that relay 2 is active
• serial RS 232 interface to connect to a PC for parameterisation and
diagnosis of the Strain Gauge Converter using FDT.
• a display for measured value and error message display and for
display during parameterisation mode
•
four buttons for parameterisation of the Strain Gauge Converters
− S (Up)
− T (Down)
− ESC (Escape)
− OK
Strain Gauge Converters you will find:
Display mode and error messages
Meas
ured value display
• In normal operation, the current net value is indicated on the display in the selected unit.
• If you hold down the T key, the current gross value is indicated on the display in the selected unit.
•
If you hold down the S key, the mV value actually measured by the Strain Gauge Converters on
th
e terminals 1 and 2 is indicated on the display.
• As usual, the following applies: net value = gross value - tare
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Bul. 937C Strain Gauge Converter Installation Instructions
Messages during operation
• Alarm freeze
• Hold on error
messages
Error
•
Err INT: error
sensor is connected
•
Err MEM: error in the memory of the Strain Gauge Converters
•
Err SIM: Strain Gauge Converter in simulation mode (only when using FDT.
• Err CELL: cell breakage or no cell connected; for information on selecting the check for sensor
breakage
If you cannot solve the problem by checking the cell and the cell cables and by switching the Strain
Gauge Converters off/on, please contact
In the case of a fault, the relays switch into a state with no current, unless you have selected the
function Hold on error .
in the internal communication of the Strain Gauge Converters; may also occur if no
Rockwell Automation.
Editing device data
WARNING: A change in device data will change the operation of the device!
WARNING: Before entering new
installation will result.
FDT Interface
This manual describes Parameterization mode of the universal frequency converter using the control panel. parameterization mode
for the universal frequency converter is more convenient with a PC using Field Device Tool (FDT) software.
Some specialized functions can only be selected using the FDT , for instance, pulse suppression as an alternative to the start-up
override.
The FDT interface is the specification describing the standardized data exchange between devices and control system or engineering
or asset management tools. Examples include: PACTware
FDT frame software can be downloaded from the web: www.pactware.com www.fdtgroup.org.
TM
PACTware
is trademark of PACTware Consortium
data into the device, you should therefore as certain that no danger to the
TM
, FieldCare, FactoryTalk AssetCentre, and Process Device Configuration.
8
Parameterization mode control panel
Programming
Bul. 937C Strain Gauge Converter Installation Instructions
Main menu parameterization mode
Display mode
You can return to display mode from any point in the menu in parameterization mode by pressing the ESC
key (possibly multiple times). If you do not press any key for 10 minutes in parameterization mode, the
device automatically switches back into display mode.
OK + ESC (simultaneously, 1 sec)
ESC
Unit ()
Input ()
Output
Service
9
Bul. 937C Strain Gauge Converter Installation Instructions
Password
You can protect the current configuration from unauthorized changes by using a password (See Service;
inactive when Strain Gauge Converter is delivered).
If password protection is active, the various settings in parameterization mode are visible before entry of the
password, but may not be changed. The first time an attempt is made to change a setting, the device
automatically displays a window for entering the password.
• You must enter the password once each time after switching from display mode to parameterization
mode.
• Th
e password cannot be changed and is 1234.
How to enter the password:
automatic switch to password entry
Parameters still protected ESC
Change
attempt
Parameters released OK, value 1234
*If the or keys are pressed, the value changes stepwise ; if the or keys are held down for a longer
period, the value "rolls" to higher or lower values.
Value 0, flashing
, *:
new value, flashing
ESC
OK, wrong value
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Bul. 937C Strain Gauge Converter Installation Instructions
Navigation Method
The following illustration shows the navigation method in parameterization mode using the , , OK, and
ESC keys:
Output
OK →
← ESC
← ESC ← ESC
← ESC
Relay 1
Relay 2
I
out
ST
OK →
ST
Mode of operation
11
Lowest menu level
Choose Values, Enter Numbers
At the lowest level of t. e menus, you can
individual parameters, or enter a numeric value.
either choose between particular possible values for
Bul. 937C Strain Gauge Converter Installation Instructions
Lowest menu level
Parameters
When entering numeric values, p
•
o
u press the or key, the value changes stepwise.
If y
•
If you hold the or key
• The sign
switches automatically.
• The d
ecimal point is moved automatically.
Units are automatically converted to higher units, e. g. kg to t, or a factor is displayed, e. g. factor 10
for numbers ≥ 10000.
lease note:
for a longer time, the value "rolls" to higher or lower values.
OK
ESC
ESC
current value, flashing
, : ESC
new value, flashing
OK
new value, saved, not flashing
12
Bul. 937C Strain Gauge Converter Installation Instructions
Unit
The following figure shows the menu for the unit. The menu options of the lowest menu level are
surrounded by a bold box. The unit is used for the measured value display (net and gross) and for all
respective settings in the parameterisation mode.
Unit —— kg*
N
%
cbm (m³)
pcs (pieces)
* If more than 9999 kg are entered, the unit changes automatically from kg on t!
The Strain Gauge Converter makes measurements in mV.
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