Rockwell Automation 44887-PUB, 44887 User Manual
Enwatch
Installation Guide
Important User Information
Solid state equipment has operational characteristics differing from those of
electromechanical equipment. Safety Guidelines for the Application, Installation and
Maintenance of Solid State Controls (Publication SGI-1.1 available from your local
Rockwell Automation sales office or online at http://www.ab.com/manuals/gi)
describes some important differences between solid state equipment and hard-wired
electromechanical devices. Because of this difference, and also because of the wide
variety of uses for solid state equipment, all persons responsible for applying this
equipment must satisfy themselves that each intended application of this equipment is
acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or
consequential damages resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes.
Because of the many variables and requirements associated with any particular
installation, Rockwell Automation, Inc. cannot assume responsibility or liability for
actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of
information, circuits, equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written
permission of Rockwell Automation, Inc. is prohibited.
Throughout this manual we use notes to make you aware of safety considerations.
WARNING
IMPORTANT
ATTENTION
SHOCK HAZARD
BURN HAZARD
Identifies information about practices or circumstances
that can cause an explosion in a hazardous environment,
which may lead to personal injury or death, property
damage, or economic loss.
Identifies information that is critical for successful
application and understanding of the product.
Identifies information about practices or circumstances
that can lead to personal injury or death, property
damage, or economic loss. Attentions help you:
• identify a hazard
• avoid a hazard
• recognize the consequence
Labels may be located on or inside the drive to alert
people that dangerous voltage may be present.
Labels may be located on or inside the drive to alert
people that surfaces may be dangerous temperatures.
Emonitor and Enwatch are registered trademarks and gSE and Spike Energy are a trademarks of Rockwell Automation, Inc..
All other trademarks are the property of their respective holders and are hereby acknowledged.
Important User Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Table of Contents Chapter 1
Installing the Enwatch
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Electrical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Rockwell Automation Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Analog Input Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Trigger Isolation Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Normal Operation versus Monitor Mode . . . . . . . . . . . . . . . . . . . . 9
Serial Port (RS-232) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Flash Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
On Board Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Setting Up an Enwatch Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Connecting Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Connecting an ICP Accelerometer . . . . . . . . . . . . . . . . . . . . . . . . . 17
Connecting a Coil-Based Velocity Sensor . . . . . . . . . . . . . . . . . . . 18
Connecting an Process DC Voltage Signal. . . . . . . . . . . . . . . . . . . 19
Connecting a Magnetic Hall Effect Sensor. . . . . . . . . . . . . . . . . . . 20
Enwatch Measurement Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Setting Up Sample Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . 25
Configuration of Emonitor with Enwatch . . . . . . . . . . . . . . . . . . . . . . 32
Table of Contents
Chapter 2
Specifications
Index
iii Publication GMSI10-UM031C-EN-E - July 2005
Power Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Temperature Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table of Contents iv
Publication GMSI10-UM031C-EN-E - July 2005
Chapter
1
Installing the Enwatch
This manual introduces you to the Allen Bradley Enwatch® unit. The manual
is intended for anyone who installs, tests, or configures the Enwatch hardware.
It does not cover using the Enwatch unit to collect data. For information on
collecting data with the Enwatch unit, refer to the Online Applications Guide
provided with your Emonitor
®
online system.
Introduction
CHANNEL
ICP 1
ICP 2
ICP 16
External Trig. 1 - Event
External Trig. 4
Enwatch is a distributed network system providing 16 channels of analog
inputs together with 4 trigger channels. The unit includes signal conditioning
and analog to digital conversion. It allows you to connect 16 two-wire ICP or
other sensors into your Emonitor Online system. Each Enwatch unit is a
microprocessor-based system, complete with network controller that carries
out data acquisition tasks as directed by an Emonitor unload station. A typical
diagram for an Enwatch unit is shown in Figure 1.1, below.
Figure 1.1 Enwatch diagram
gSE
HP Filters
15:1
Bias Check
Multiplexer
4:1
Aux.
Intergrator
Programable
Gain
Select
Programable
Anti-Alias
Filter
A to D
Converter
Clock
Generator
Flash
SRAM
Watchdog
Microprocessor
RS-232
Ethernet
Controller
Power
Regulation
10Base-T
DC in
The Enwatch unit responds to all relevant network data exchanges as defined
by the Ethernet protocol using the UDP/IP standard. In addition, there is a
comprehensive on-board monitor program that can exercise all functions via
the on-board serial RS232 port.
1 Publication GMSI10-UM031C-EN-E - January 2009
2 Installing the Enwatch
Installation
The Enwatch unit is easy to install. The enclosure is mounted using four
screws. Cables are terminated on removable screw terminal blocks, making
installation and service simple. Network cables are terminated on the board
using a a standard RJ-45 connector.
Each Enwatch board has four status LEDs to monitor system activity. In the
unlikely event of a system problem, a portable PC can be used to diagnose the
problem using the RS-232 serial interface on each Enwatch board.
Prior to installation, the only set-up required is to assign an IP address, Subnet
Mask, and Gateway IP address (if available) to the node. This must be a unique
address on the network. You assign the IP address by connecting a terminal
(or PC in terminal mode) to the on-board RS-232 port and using the on-board
monitor program. See “Setting Up an Enwatch Unit” on page 11 for more
information.
Electrical
The circuit board is a completely self-contained 16-channel analog input to
Ethernet interface, including power regulation and local communication
facilities. A block diagram of the board is shown in Figure 1.1 on page 1. Each
block of the diagram is described below.
• ICP interface - Each of the 16 channels has its own ICP interface that
is capable of powering a typical two-wire ICP transducer. The nominal
voltage is 24 V with a constant current of 3.6 mA. A typical transducer
has a bias voltage value of around 11 V, so that the system can
accommodate a full ±10V input range. The ICP interface can be
disabled for AC and DC coupling of voltage signals.
• Multiplexer - The multiplexer circuit selects one of the 16 input
channels under software control. All inputs are over-voltage and ESD
protected.
• High pass filters - Four software-programmable high-pass filters
(0.36 Hz, 2.67 Hz, 5.3 Hz, and 23.8 Hz) are available to remove
unwanted low frequency signals.
• Integrator - An on-board hardware integrator is available for getting a
velocity measurement from an accelerometer, as well as displacement
from a velocity sensor. The host software can perform a second level of
integration if required.
• Spike Energy™ function (gSE™) - gSE provides a conditioned
signal suitable for measurement of bearing condition.
• Anti-aliasing filter - This filter removes high-frequency components
from the incoming analog signal that might alias back into the sampled
signal, resulting in incorrect data in the spectrum. The filter has a very
high roll-off and removes all alias effects in standard sampling/spectral
analysis applications.
Publication GMSI10-UM031C-EN-E - January 2009
Installing the Enwatch 3
• Analog-to-digital converter (ADC) - The ADC samples up to
51.2 kHz and has 16-bit resolution, providing a theoretical dynamic
range of 96 dB.
• Clock generator - The timer varies the sampling rate under
microprocessor control. Sampling can be synchronized to one of 4
external triggers (typically a once-per-rev TTL signal from a rotating
shaft). This system can also take a preprogrammed number of samples
per revolution. The external trigger acts as a tachometer to determine
shaft speed. Pre and post-trigger functions are available.
• Gain amplifier - The Enwatch unit automatically sets the input gain in
auto-range mode as each channel is selected by the multiplexer.
• Microprocessor subsystem - This comprises the microprocessor,
flash memory, and SRAM memory. The microprocessor controls the
Enwatch unit under instructions stored in the flash memory. The SRAM
memory acts as a temporary data storage area if buffering is required
before data is transferred over the network.
• Watchdog - The microprocessor subsystem incorporates a watchdog
facility that, if a power glitch or other external effect interrupts the
system, automatically resets without the need for user intervention.
• Ethernet controller/buffer memory/10Base-T - These functions
control data transfer over the Ethernet network. The system uses the
UDP/IP standard protocol and implements 10 Base-T as the physical
network layer.
• Power regulation - Input DC power is derived from an AC to DC
converter (not shown in Figure 1.1) and the Power Regulation function
provides the secondary DC voltages as required.
Rockwell Automation Support
Mechanical
The Enwatch unit is comprised of a single circuit board housed in a sealed (IP
66) enclosure. Each system has its own self-contained power supply, and
terminals for the input, power, tachometer, and network cables.
Rockwell Automation provides technical information on the Web to assist you
in using its products. At http://support.rockwellautomation.com
technical manuals, a knowledge base of FAQs, technical and application notes,
sample code and links to software service packs, and a MySupport feature that
you can customize to make the best use of these tools.
For an additional level of technical phone support for installation,
configuration, and troubleshooting, we offer TechConnect support programs.
For more information, contact your local distributor or Rockwell Automation
representative, or visit http://support.rockwellautomation.com
Publication GMSI10-UM031C-EN-E - January 2009
, you can find
.
4 Installing the Enwatch
Electrical Connections
9.25"
(235 mm)
This section describes the electrical connections on the Enwatch board, shown
in Figure 1.2, below.
Figure 1.2 Enwatch electrical connections
6.75" (170 mm)
J11
JP 20
JP 19
JP 18
JP 17
J9
_
+
DC Power In
J6
J5
J4
J3
4
33
22
1
3
33
Ext. Trigger
22
Input Terminal
1
Block
33
2
22
1
1
33
22
1
J8
Status LED's
Network Input
RJ-45 Jack
RX LK OB
TX
U28
U20
Normal / Monitor
Mode Select
RS-232
DB-9 (female)
JP 21
RV2
RV3
Analog Input Configuration Jumpers
A - B A - B A - B A - B A - B A - B
1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 9-10-11-12-13-14-15-16 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8
A - B A - B A - B A - B A - B
A - B
J1
Input Connector Block
RV1
9-10-11-12-13-14-15-16
J2
A - B
A - B
A - B
A - B
Publication GMSI10-UM031C-EN-E - January 2009
Installing the Enwatch 5
Connectors
The Enwatch unit has 11 connectors labeled J1 to J11 as shown in Table 1.1.
Table 1.1 Enwatch connectors
Connector No. of Pins Function
J1 16 Analog input channels 1–8
J2 16 Analog input channels 9–16
J3 3 External trigger 1 / event 1
J4 3 External trigger 2 / event 2
J5 3 External trigger 3
J6 3 External trigger 4
J7 5 Test points (service use only)
J8 8 Ethernet interface
J9 2 Supply voltage
J10 2 Spare
J11 9 Serial port (RS-232)
The location of the connectors is shown in Figure 1.2 on page 4. The pin
outputs are listed in the following tables.
Table 1.2 J1 and J2 pin outputs
J1: Analog Inputs 1-8 J2: Analog Inputs 9-16
Signal Pin No Signal Pin No.
CH 1 input
CH 1 ground
CH 2 input
CH 2 ground
CH 3 input
CH 3 ground
CH 4 input
CH 4 ground
CH 5 input
CH 5 ground
CH 6 input
CH 6 ground
CH 7 input
CH 7 ground
CH 8 input
CH 8 ground
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CH 9 input
CH 9 ground
CH 10 input
CH 10 ground
CH 11 input
CH 11 ground
CH 12 input
CH 12 ground
CH 13 input
CH 13 ground
CH 14 input
CH 14 ground
CH 15 input
CH 15 ground
CH 16 input
CH 16 ground
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Publication GMSI10-UM031C-EN-E - January 2009
6 Installing the Enwatch
Table 1.3 J3 External trigger pin outputs
Signal Pin No. Notes
Power supply 1 See note 1 on page 7.
Input 2 See note 2 on page 7.
Ground 3
Table 1.4 J4 External trigger pin outputs
Signal Pin No. Notes
Power supply 1 See note 1 on page 7.
Input 2 See note 2 on page 7.
Ground 3
Table 1.5 J5 External trigger pin outs
Signal Pin No. Notes
Power supply 1 See note 1 on page 7.
Input 2 See note 2 on page 7.
Ground 3
Table 1.6 J6 External trigger pin outputs
Signal Pin No. Notes
Power supply 1 See note 1 on page 7.
Input 2 See note 2 on page 7.
Ground 3
Table 1.7 J8 Ethernet connection pin outputs
Common RJ-45
Publication GMSI10-UM031C-EN-E - January 2009
Installing the Enwatch 7
Table 1.8 J9 Supply voltage pin outputs
Signal Pin No.
Positive supply voltage +
Common -
Table 1.9 J10 pin outputs
Not user accessible
Table 1.10 J11 Serial port (RS-232) pin outputs
Signal Pin No. Notes
TXD 1 To connect to a host computer, use a
RXD 2
Ground 3
null modem 9-pin female to 9-pin
female cable.
Notes:
1. A supply voltage is available on pin 1 of the connector to power an
external trigger device. The voltage is equal to the voltage of the
incoming power supply to the board (on connector J9).
2. The external trigger is compatible with a CMOS/TTL logic level (5 V
logic). Alternatively, any voltage input in the range 5 to 24 V can be
accommodated. The trigger can be isolated or non-isolated.
Analog Input Configuration
The 16 analog inputs provide you three options for signal coupling using a
3-way configurable jumper. The three positions are described in Table 1.11.
Table 1.11 Analog input options
Position Description
ICP Interface (nominal 24 V supply at 3.6 mA constant current for
transducer powering)
DC DC coupled
AC AC coupled
Publication GMSI10-UM031C-EN-E - January 2009
8 Installing the Enwatch
Each channel (16 total) has a 3-way header associated with it. These are labeled
with the channel number and “A” or “B.” The three jumper options are:
• Fitted to position xA
• Fitted to position xB
• Not fitted
where x is the channel number 1-16.
x B
Position Coupling
x A ICP
x B DC Coupled
Not Fitted AC Coupled
x A
IMPORTANT
The -3dB point of the high-pass coupling for the ICP
interface and AC Coupled configuration is 0.07 Hz.
LEDs
Four LEDs, as shown in Figure 1.2 on page 4, indicate the status of the
Ethernet communication. These illuminate as described in Table 1.12.
Table 1.12 LEDs
LED Description
OB The Enwatch unit is accessing LAN controller
LK Communication link is established between Enwatch unit and
network
RX Data is being received
TX Data is being transmitted
Publication GMSI10-UM031C-EN-E - January 2009
Installing the Enwatch 9
Trigger Isolation Jumpers
Four jumpers, JP17 to JP20, are sited on the board to enable the four trigger
inputs to be isolated or non-isolated. Non-isolated means the common of the
trigger input can be connected to the common of the Enwatch unit. With a
jumper removed, the trigger is isolated. Table 1.13 summarizes the jumper
positions.
Table 1.13 Jumper positions
Mode Jumper
External trigger 1 isolated JP17 Out
External trigger 1 non-isolated JP 17 In
External trigger 2 isolated JP18 Out
External trigger 2 non-isolated JP18 In
External trigger 3 isolated JP19 Out
External trigger 3 non-isolated JP19 In
External trigger 4 isolated JP20 Out
External trigger 4 non-isolated JP20 In
IMPORTANT
If an external sensor is to be used that is powered from pin
1 of J3, J4, J5 or J6, then the jumper corresponding to the
trigger channel must be inserted to provide a ground return
path for the sensor power.
Normal Operation versus Monitor Mode
The Enwatch unit incorporates an on-board monitor program for checking
the unit and modifying the system’s IP address. Inserting a jumper in JP21
enters into monitor mode.
Table 1.14 Normal vs. monitor mode
Mode Jumper J21
Normal Out
Monitor In
Publication GMSI10-UM031C-EN-E - January 2009
10 Installing the Enwatch
Serial Port (RS-232)
An RS-232 compatible serial port is available on connector J11 for providing
local communication with the board (independent of the Ethernet network).
Only RXD and TXD lines are supported, and so a null modem cable must be
used. An on-board software monitor is provided to communicate through the
serial port.
If you do not use a 9-pin female to female null modem cable, the
recommended cable connection to a PC is shown in Table 1.15.
Table 1.15 J11 cable connections
J11 9-Pin D-Shell Connector
12
23
35
Supply Voltage
Incoming supply voltage to the power supply is 80 to 240 VAC / 50 or 60 Hz.
The power supply should be rated for a minimum of 1 A. If you have an
ISSUE F board, set the AC to DC power supply output voltage to 9 VDC. All
ISSUE G boards and higher, require a 24 VDC power supply. The power
supply that comes with the ISSUE G boards is pre set to 24 VDC and should
not be adjusted.
WARNING
TIP
Never attempt to connect the ISSUE F board to a 24V
power supply as doing this will damage the board. Always
ensure you have the proper power supply for the board
ISSUE you are using. The 24VDC power supply for ISSUE
G and higher boards has a yellow label that is marked
24VDC. The 12VDC power supply for ISSUE F boards
has a blue label that is marked 12VDC.
The ISSUE letter is located on the board. ISSUE F is
located at the bottom edge of the board near the J2
connector. See Figure 1.2 on page 4.
Publication GMSI10-UM031C-EN-E - January 2009
The ISSUE letter for ISSUE G and higher boards is
located in the upper left corner of the board, near the J8
connector.
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