Rockwell Automation 937CU-AITXF-DC1 User Manual

937CU-AITXF-DC1 Installation Instructions

Transmitter Supply Converter

Symbols Used

Warning

Attention

Note

Bul. 937C Transmitter Supply Converter Installation Instructions

This symbol warns of possi
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 fault.

to heed this warning can lead to total failure of the device and any other

Failure
connected equipment.

This symbol draws attention to important information.

ble danger.

1

Safety Notes

Attention

Attention

Bul. 937C Transmitter Supply Converter Installation Instructions

The Transmitter Supply Converter must only be operated by trained personnel in
accordance with this handbook.

The protection of operating personnel and of the system is only
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 a
hazardous area.

ensured if the devices are used in

djusted by electrical professionals outside the

2

Attention

Warning

Note

If faults cannot be eliminated, the devices must be taken out of operation and protected from being
placed in service again
dangerous and therefore not permitted. They render the warranty void.

The responsibility for the adherence to local

Note

inadvertently. Tampering with or making changes to the devices is

safety standards lies with the operator.

Bul. 937C Transmitter Supply Converter Installation Instructions

ation and Connection

Install

Application Information

Bulletin 937 Intrinsically Safe Barriers transmit si gnals
between field devices and a process control system/control
system.

They are suitable for the connection of field devices used in
potentially explosive atmospheres. Safe field circuits for
these devices are intrinsically safe and are galvanically
isolated from non-intrinsically safe circuits. establish an
electroma gnetic separation be tween the potentially
explosive atmospheres and the safe areas in a system.

The transmitter supply coverters are measuring units that

provide an output signal consisting of a unit current signal
(4 mA ... 20 mA). A transmitter power supply provides a
transmitter with power and processes the
current signal.

The transmitter supply conerter translates a fully
parameterizable partition of input signal into a
proportional output current (4ma...20mA)

This output signal will be transferred to indicators or to
analog inputs on the process control system/control
system, for example. Both relay outputs of the transmitter
supply converter can monitor two fully parameterizable
trip values of the input signal.

3

Bul. 937C Transmitter Supply Converter Installation Instructions

Installa

tion

The Transmitter Supply 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.

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 Transmitter Supply Converter Installation Instructions

Connection

The removable terminals of the Bulletin 937 Converters simplif y the
connection and the switch cabinet assembly. They make it possible to
replace devices quickly and without error if a customer service becomes
necessary.

Terminals are equipped with screws, are self- opening , have a large
connection area for a wire cross-section up to 2.5 mm/14 AWG and
coded plugs, making it impossible to mix them up.

Connection terminals (Input) IS Side

The intrinsically safe field circuit is connected to the blue
terminals 1 and 3. These may be g uided into the potentially
explosive areas with connector cables in accordance with
DIN EN 60079-14. Terminal 2 is always left unconnected.

The non-intrinsically safe field circuit is connected to the
black terminals 1

Yo u c an co nn e ct :

a 3-wire transmitter

•

•

a 2-wire transmitter with HART

•

an active current source

through 3.

1

2

3.

HART

mA

1+

2-

3

mA

Zone 0, 1, 2

Div. 1, 2

Power Rail

ERR 24 V DC

5

Bul. 937C Transmitter Supply Converter Installation Instructions

Connection (Output) Safe Side

The functions of the other black terminals are as

follows:

The control circuit and the power supply are connected to the b
te

rminals 7 to 24

The terminals have the following functions:

• Terminals 7/8: current output (terminal 9 not used)

•

• Terminals 16 ... 18: relay 2

•

24 V DC power supply

Terminals 4 ... 6, 13 ... 15 and 19 ... 21 do not exist

6

.

Terminals 10 ... 12: relay 1

Terminals 23/24: (terminal 22 not used)

lack

1+

2-

3

Power Rail

ERR 24 V DC

10
11

I

12

16
17

II

18

7-

mA

III

8+

23+

24 V DC

24-

Zone 2

Div. 2

Bul. 937C Transmitter Supply Converter Installation Instructions

Front

The following indicating and operating elements are located on the front of the

Transmitter Supply Converter:

ED CHK (red) to indicate a device fault

• L

• LED PWR (green) to indicate the presen

• LED OUT 1 (yellow) to indi

• LED OUT 2 (yellow) to indi

•

RS 232 serial interface for a connection to a PC for setting parameters

cate that relay 1 is active
cate that relay 2 is active

and diagnosis of the transmitter supply converter using FDT.

• Display for indicati

parameteri

on of the measured values, fault messages and

zation modi

• Four keys for setting the parameters of the transmitter supply converter:



(Up)

(Down) ESC (Escape) OK



ce of

the supply voltage

1 234 5

PWR

ERR

1 2

OUT

RS232

7 8 9

13

14 15

192021

10 11 12
16
222324

6

ESC

OK

17 18

7

Bul. 937C Transmitter Supply Converter Installation Instructions

Display modes and error messages

In normal operation, the current measured value is indicated in the selected unit.

If the Alarm freeze is triggered but the device continues operating normally, a corresponding
message appears in the second line of the display.

If a fault occurs, one of the following messages is displayed until the fault is rectified (when
parameterized):

• Err Mem for device fault,

• Err LB for lead breakage,

• Err SC for short circuit,

The relays de-energizes when a fault occurs.

The display of the device is updated at regular intervals. This can causes a short
flickering of the display. This flickering isn't a defect of the display.

Note

Editing Device Data

WARNING: A change in device data will change the operation of the device!
WARNING: Before entering new data into the device, you should therefore as

certain that no danger to the 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: PACTwareTM , FieldCare,

FactoryTalk AssetCentre, and Process Device Configuration. FDT frame software can be downloaded
from the web: www.pactware.com www.fdtgroup.org.
PACTwareTM is trademark of PACTware Consortium

8

Parameterization mode control panel

Programming

Bul. 937C Transmitter Supply 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 m
parameterization mode, the device automatically switches back into display mode.

OK + ESC (simultaneously, 1 sec) 

←ESC

Unit ()

Input ()

Output

Service

inutes in

9