Rockwell Automation EK-44750C User Manual
Installation Instructions
Enwatch Unit
Catalog Number
EK-44750C
Topic Page
Important User Information 2
Enwatch Unit Overview 3
Install the Enwatch Unit 6
Wire the Enwatch Unit 8
Apply Power 12
Network Configuration 13
Monitoring and Troubleshooting 15
Enwatch Measurement Capabilities 17
Configure and Enwatch Board with Emonitor Software 25
Add an Enwatch Unload Station 25
Specifications 31
Additional Resources 32
2 Enwatch Unit
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
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, when necessary, we use notes to make you aware of safety considerations.
SGI-1.1 available from your local Rockwell Automation sales office or online at http://www.rockwellautomation.com/literature/) describes some important
WARNING: 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.
ATTENTION: 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 and recognize the consequences.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may reach dangerous temperatures.
IMPORTANT Identifies information that is critical for successful application and understanding of the product.
ATTENTION: This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as
defined in IEC 60664-1), at altitudes up to 2000 m (6562 ft) without derating.
Rockwell Automation Publication GMSI10-IN001A-EN-P - May 2013
Enwatch Unit 3
Enwatch Unit Overview
The following sections give an overview of the hardware and electrical
components of the Enwatch® unit.
Hardware Overview
The Enwatch unit contains a printed circuit board and power supply on a
mounting base plate and housed in a metal enclosure. Use the key on the door of
the enclosure to access the enclosure.
The unit is pre-wired with mains input terminals connected to an internal 24V
power supply. The power supply and internal wiring are fitted to a mounting
base.
The output of the 24V power supply connects to the printed circuit board. The
circuit board is mounted on six stand-offs to the mounting base plate. The
printed circuit board and terminal connectors are packed separately.
To correctly install the unit, follow the steps in
page 6.
Install the Enwatch Unit on
Rockwell Automation Publication GMSI10-IN001A-EN-P - May 2013
4 Enwatch Unit
Electrical Overview
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 lets you connect 16 two-wire ICP or other sensors
into your Emonitor® Online system. Each Enwatch unit is a
microprocessor-based system, complete with a 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 - Enwatch Block Diagram
Figure 1.
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.
Rockwell Automation Publication GMSI10-IN001A-EN-P - May 2013
Enwatch Unit 5
The circuit board is a completely self-contained, 16-channel analog input to
Ethernet interface, including power regulation and local communication
facilities. Each block of the diagram in
Table 1 - Electrical Block Descriptions
Block Description
ICP interface Each of the 16 channels has its own ICP interface that is capable of powering a typical
Multiplexer The multiplexer circuit selects one of the 16 input channels under software control.
High-pass filters Four software-programmable high-pass filters (0.36 Hz, 2.67 Hz, 5.3 Hz, and 23.8
Integrator An on-board hardware integrator is available for getting a velocity measurement
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
Analog-to-digital converter
(ADC)
Clock generator The timer varies the sampling rate under microprocessor control. Sampling can be
Gain amplifier The Enwatch unit automatically sets the input gain in auto-range mode as each
Microprocessor subsystem This contains the microprocessor, flash memory, and SRAM memory. The
Watchdog The microprocessor subsystem incorporates a watchdog that, if a power glitch or
Ethernet controller/buffer
memory/10Base-T
Power regulation Input DC power is derived from an AC to DC converter and the Power Regulation
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.
All inputs are over-voltage and ESD protected.
Hz) are available to remove unwanted low frequency signals.
from an accelerometer, as well as displacement from a velocity sensor. The host
software can perform a second level of integration if required.
that can 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.
The ADC samples up to 51.2 kHz and has 16-bit resolution, providing a theoretical
dynamic range of 96 dB.
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.
channel is selected by the multiplexer.
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.
other external effect interrupts the system, automatically resets without the need for
user intervention.
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.
function provides the secondary DC voltages as required.
Figure 1 on page 4 is described below.
Rockwell Automation Publication GMSI10-IN001A-EN-P - May 2013
6 Enwatch Unit
Install the Enwatch Unit
Use these installation instructions to install, test, and configure the Enwatch
hardware. For information on collecting data with the Enwatch unit, refer to the
Emonitor User's Guide, publication
ATTENTION: If the Enwatch unit is used in a manner not specified by Rockwell
Automation, the protection provided by the Enwatch unit may be compromised.
EMONTR-UM001.
Install the Enclosure and Mounting Base Assembly
Follow these steps to install the enclosure and mounting base assembly.
ATTENTION:
• Only properly trained and certified professionals should complete these steps.
• All local safety regulations regarding mains powered equipment must be followed.
• Do not tamper with or deface safety or rating labels - they are there to ensure safe
operation and servicing.
• A switch or circuit breaker must be included in the installation of the Enwatch unit,
and must be:
– suitably located and easily reached; and
– marked as the disconnecting device for the equipment.
• The Enwatch unit must have an Earth Ground.
• The incoming supply must be in the range 100 to 240V AC and 50 or 60 Hz.
• The incoming mains power supply must be fused at 3A with a single spur, Enwatch
units can not be daisy chained from a single fused source.
1. Remove the four screws and washers from the corners of the mounting
base-plate, then remove the power supply and mounting base assembly.
2. Drill the enclosure for conduit connection and other required cables.
3. Use the included bracket set to mount the unit to the wall.
4. Fit the power supply and mounting base assembly back into position and
replace the four mounting base-plate screws and washers.
5. To connect mains power to the Enwatch unit, follow these steps.
Earth Ground Terminal Strip
Mains Power Input and
Earth Ground Terminals
a. Ensure that the mains input cables are isolated at source from mains
power.
b. Connect the earth grounding wire at the bottom-right corner.
c. Remove the yellow safety cover from the live (L) and neutral (N)
terminals.
Rockwell Automation Publication GMSI10-IN001A-EN-P - May 2013
RX LK OB
TX
11
10
7
13
15
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
1
d. Connect mains input wires, paying attention to terminal markings
live (L) and neutral (N).
e. Verify that all connections are safely made, then replace the yellow
safety cover.
Install the Enwatch Board
Use the following information to install the Enwatch board.
12
9
9-10-11-12-13-14-15-16
2
_
+
8
6
5
4
3
14
A - B
16
A - B
A - B
A - B
Connector Description Pin No./name - Signal
1 Analog input channels 1–8 1 - CH 1 input
33
22
1
33
22
1
33
22
1
2 Analog input channels 9–16 1 - CH 9 input
33
22
1
3 External trigger 1 / event 1 1 - Power supply
4 External trigger 2 / event 2
5 External trigger 3
6 External trigger 4
7 Ethernet interface RJ-45
8 Supply voltage + (plus) - Positive supply voltage
9 Serial port (RS-232)
(1)
10 Status Indicators See
11…16 Screws
2 - CH 1 ground
3 - CH 2 input
4 - CH 2 ground
5 - CH 3 input
6 - CH 3 ground
7 - CH 4 input
8 - CH 4 ground
2 - CH 9 ground
3 - CH 10 input
4 - CH 10 ground
5 - CH 11 input
6 - CH 11 ground
7 - CH 12 input
8 - CH 12 ground
(2)
(3)
2 - Input
3 - Ground
- (minus) - Common
2 - RXD
3 - TXD
5 - Ground
Status Indicators on page 16
Enwatch Unit 7
9 - CH 5 input
10 - CH 5 ground
11 - CH 6 input
12 - CH 6 ground
13 - CH 7 input
14 - CH 7 ground
15 - CH 8 input
16 - CH 8 ground
9 - CH 13 input
10 - CH 13 ground
11 - CH 14 input
12 - CH 14 ground
13 - CH 15 input
14 - CH 15 ground
15 - CH 16 input
16 - CH 16 ground
(1) To connect to a host computer, use a null modem 9-pin female to 9-pin female cable.
(2) 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). The limit on the power supply pin on
each external trigger is limit 50 mA.
(3) 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.
1. Place the Enwatch board on the mounting base-plate standoffs and insert
the screws.
2. Connect the Ethernet cable.
Rockwell Automation Publication GMSI10-IN001A-EN-P - May 2013
8 Enwatch Unit
Wire the Enwatch Unit
For optimum performance, use shielded cables for all connections to the Enwatch
unit. For sensors such as accelerometers, connect the screens on the cables to
chassis ground at only one point. The optimal place for this is inside the Enwatch
enclosure and eight ground terminals are provided for this purpose. Connect the
screen at only one end; do not connect to ground at both ends.
Earth Ground Terminal Strip
Mains Power Input and
Earth Ground Terminals
Analog Input Configuration
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 and couplings
are the following.
Coupling Fitted to Position Description
ICP x A
DC x B
AC Not Fitted AC coupled
(1)
(1)
ICP power (nominal 24 V at 3.6 mA constant current for
transducer powering)
DC coupled
(1) Where x is the channel number, 1-16.
IMPORTANT
The -3dB point of the high-pass coupling for the ICP interface and AC Coupled
configuration is 0.07 Hz.
Rockwell Automation Publication GMSI10-IN001A-EN-P - May 2013
Enwatch Unit 9
Trigger Isolation Jumpers
These jumpers cause 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.
The following table describes the jumper positions.
20
19
18
17
33
22
1
33
22
1
33
22
1
33
22
1
Mode Jumper Position
External trigger 1 isolated 17 Out
External trigger 1 non-isolated 17 In
External trigger 2 isolated 18 Out
External trigger 2 non-isolated 18 In
External trigger 3 isolated 19 Out
External trigger 3 non-isolated 19 In
External trigger 4 isolated 20 Out
External trigger 4 non-isolated 20 In
IMPORTANT
If an external sensor is powered from pin 1 of the external trigger terminals, the
jumper corresponding to the trigger channel must be inserted to provide a ground
return path for the sensor power.
Rockwell Automation Publication GMSI10-IN001A-EN-P - May 2013
10 Enwatch Unit
Serial Port (RS-232)
An RS-232 compatible serial port is available 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 computer is defined in the table below.
OB
RS-232 Pin 9-Pin D-Shell Connector
RX 2
TX 3
Gnd 5
9
_
Transducers
The following sections show how to connect transducers to the Enwatch
terminals.
Connecting an ICP Accelerometer
The following diagram shows the wiring from an ICP accelerometer to the
terminals of the Enwatch unit.
Rockwell Automation Publication GMSI10-IN001A-EN-P - May 2013
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