USER GUIDE TB-9033
WS Aware Workstation Monitor
Installation, Operation and Maintenance
Made in the
United States of America
Power LED:
Indicates that WS Aware Workstation
Monitor is on.
Audible Alarm Button:
It is used to enable and disable
the sound, and adjust the resistance settings.
Packaging
Figure 1. SCS WS Aware Workstation Monitor with Big
Brother Remote Terminals
Check that the following items are included with the WS
Aware Workstation Monitor shipping box
1 - WS Aware Workstation Monitor
2 - Remote terminals for wrist straps
1 - Ring terminal for grounding
1 - 6 x 32 1/4" Screw
1 - Power Supply Unit
2 - 10' (3 m) mini-DIN cables for connection between
WS Aware Workstation Monitor and remote terminals
Note: Packages containing custom configurations will
contain items not included on this list.
Functions
The WS Aware Workstation Monitor works with dual
wrist straps that have a standard 3.0 mm audio mono
plug. It verifies proper wearing of a wrist strap by
measuring an operator’s resistance.
A charge can be easily developed on a body during
movements. WS Aware Workstation Monitor detects
body voltage and alarms if it exceeds the preset level.
Alarm thresholds for body resistance and body voltage
are set at the factory but can be changed in the field.
Please contact SCS Representatives or authorized
distributors for details.
The WS Aware Workstation Monitor provides
independent monitoring of four grounds – two tool
grounds and two mat grounds. An option for four tool
grounds is also available.
Red LEDs indicate that when wrist strap fails, or when
proximity sensor fails, or when wrist strap is incorrectly
plugged into the visitor’s jack.
Green LEDs indicate that wrist straps are properly
connected and worn.
Tool Ground LEDs (all models):
Tri-color LEDs that
show green when ground impedance is within limits, red
when ground fails, blinking yellow when EMI threshold is
exceeded and off when disabled.
Mat LEDs (CTC061 only):
Dual-color LEDs that show
green when ground resistance is within limits, red when
there is failure and off when disabled.
Ground terminal connect to facility ground.
Ground Enable Switches enable or disable monitoring of
ground. It is also used to adjust the resistance threshold.
Installation
Mounting Instructions
1.
Set your WS Aware Workstation Monitor in a clearly
visible, convenient location where it doesn’t interfere
with your normal work.
2. Secure the wrist strap terminals in easy-to-reach
but out-of-the-way locations, such as fastening
them to the bottom of the workbenches. Since there
are two remote terminals, place each of them in a
convenient place for each operator.
3.
GROUNDING - Ground your WS Aware Workstation
Monitor using the supplied ring terminal and screw
to the grounding terminal on the right side of the WS
Aware Workstation Monitor. You will need a crimping
tool and a desired length of wire. Please make
sure that you connect the other end of the wire to a
known good ground.
Figure 2. WS Aware Workstation Monitor features and
components (front view)
SCS
- 926 JR Industrial Drive, Sanford, NC 27332 • (919) 718-0000 • Website:
StaticControl.com
TB-9033
Page 1 of 7
October 2015
© 2015 DESCO INDUSTRIES, INC.
Employee Owned
Audible
Alarm Button
Programming Header
(manufacturer use only)
Remote Terminals
The WS Aware Workstation Monitor uses two separate
remote terminals, making it convenient for each
operator. A remote terminal is connected by a mini-
DIN 6-pin male/male cable. This cable can be unplugged
making remote terminal easy to replace without rerouting
the cable. Each remote terminal has two 3.0 mm jacks,
one for the operator and another one for a visitor.
While both jacks provide grounding for the wrist straps,
only the operator’s jack is monitored. If the wrist strap is
plugged into the visitor’s jack and the operator’s jack is
empty, an alarm will sound.
A green led on the front panel will light up when the wrist
strap plugged into the remote terminal is working
properly.
The WS Aware Workstation Monitor has two options
of remote terminals:
CTA242
Standard and
CTA243
Big Brother. Big Brother Terminals detect the presence
of an operator and sound an alarm if an operator has
not plugged-in a wrist strap. A red LED on the Big
Brother Terminal indicates the proximity of an operator
regardless of alarm status.
Figure 3. WS Aware Workstation Monitor features and
components (right and left views)
4. Connect the WS Aware Workstation Monitor to its
remote terminals using the supplied mini-DIN cables.
Route the cables so that they are out of the way and
do not interfere.
5. Using 25-28 AWG wire connect the tools that you
wish to monitor to the ground monitor terminals on
the left side of the WS Aware Workstation Monitor.
Use a small screwdriver to press the orange levers
when inserting or removing wires. Caution: This
connection is for monitoring only and not for actual
grounding.
6. If you wish to monitor the grounding of Static
Dissipative Mats (model CTC061), use the SCS
2380
Monitor Cords, connectors and plug in their
wires to mat terminals as mentioned above.
7. If you will be using your WS Aware Workstation
Monitor with a Facility Monitoring System, you must
read the appropriate section in the FMS User Guide
first.
8. Finalize the connections. Plug the power adapter in
a convenient outlet. WS Aware Workstation Monitor
is now ready for continuous monitoring.
Enabling or Disabling Monitoring
Monitoring of each ground can be enabled or disabled
via switches on the left side of the monitor. Pushing
the switch lever down with a tip of a pen or with
a small screwdriver enables monitoring of a particular
ground. Lifting the lever disables it. When monitoring of
a particular ground is disabled, an LED corresponding
to that ground is off. Do not enable the ground that is
not connected as it will create false alarms. For mat
monitoring, it may take up to ~20 seconds for the mat
ground alarm to react. This delay virtually eliminates
false alarms.
TB-9033
Page 2 of 7
Replacing the Remote Jack
1. Unplug the DIN cable behind the terminal.
2. Remove the front cover by unscrewing two screws
and two knurled nuts.
3. Pull out the PCB stack from the casing. The top
PCB is connected to the bottom PCB by a 6-pin
connector.
4. Detach the top PCB from the bottom socket.
5. Replace the top PCB with a new piece.
6. Reassemble the stack and front cover.
7. Remove the front cover by unscrewing two screws
and two knurled nuts.
8. Plug in the DIN connector behind the terminal.
Wrist Strap Indication
Tool Ground 1
Tool Ground 2
Dissipative Surface 1
Dissipative Surface 2
Figure 4. CTC061 WS Aware Workstation Monitor
LED’s for Dissipative Surfaces and Tool Grounds
SCS
- 926 JR Industrial Drive, Sanford, NC 27332 • (919) 718-0000 • Website:
StaticControl.com
© 2015 DESCO INDUSTRIES, INC.
Employee Owned
Monitoring of each wrist strap is done independently.
When there is no wrist strap present, both LEDs for each
wrist strap are off. When a wrist strap is plugged in, a
red LED may blink for a second or two. If the wrist strap
is worn properly, a green light will be on. When a wrist
strap fails, a red light will be on. In case of body voltage
exceeding the pre-set limit, a green light may still be on
if the wrist strap is worn properly, but the red LED will
blink.
Status
No Wrist Strap
Wrist Strap OK
Body Voltage
Wrist Strap Fail
Green LED
Off
On
On
Off
Red LED
Off
Off
Blinks
On
Buzzer
Off
Off
Off
Beeps
Output Signals
The following table shows the output current (or voltage
across 250 ohms load) corresponding to different
states of ground. For a FMS to generate an alarm it is
recommended to set a 4.75V or 19mA output signal
since below this level, there is at least one failure
condition. This is valid only for 4-20mA output for -3
models.
Mat1/
Tool 3
Good
Failed
Good
Failed
Good
Good
Good
Failed
Good
Failed
Failed
Good
Failed
Failed
Good
Failed
Mat2/
Tool 4
Good
Good
Failed
Failed
Good
Good
Good
Good
Failed
Failed
Good
Failed
Failed
Good
Failed
Failed
Tool 1
Good
Good
Good
Good
Failed
Good
Failed
Failed
Failed
Failed
Good
Good
Good
Failed
Failed
Failed
Tool 2
Good
Good
Good
Good
Good
Failed
Failed
Good
Good
Good
Failed
Good
Failed
Failed
Failed
Failed
V
5.00
4.50
4.25
4.00
3.75
3.50
3.25
3.00
2.75
2.50
2.25
2.00
1.75
1.50
1.25
1.00
mA
20
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
Wrist Strap Output Signals
WS1
Off
Off
Good
Good
Bad
Good
Bad
Bad
WS2
Off
Good
Off
Good
Off
Bad
Good
Bad
Voltage(V1)
5.0
4.6
4.2
3.8
2.2
1.8
1.4
1.0
Current(mA)
20.0
18.4
16.8
15.2
8.8
7.2
5.6
4.0
Monitoring of EMI on Tool Ground
Modes of Operation
Electromagnetic interference (EMI) can cause equipment
lockups and malfunction. The WS Aware Workstation
Monitor provides monitoring of EMI on tool grounds.
It is possible to have a good connection to the ground
and presence of large EMI signal on the ground at the
same time. Though presence of EMI does not create
a failure alarm, it is wise to investigate the cause and
take measures to reduce EMI. Please contact SCS for
recommendations and for assistance in these matters.
The WS Aware Workstation Monitor can work in a stand
alone mode or connected to a DAS or a FMS.
Stand-Alone Operation
Connect the WS Aware Workstation Monitor according
to previous instructions and plug its power adapter
into a convenient outlet. Do not forget to connect the
WS Aware Workstation Monitor to ground. WS Aware
Workstation Monitor is now ready to inform you of
problems with personnel and equipment grounding. In
standalone mode, the WS Aware Workstation Monitor
functions as ESD awareness tool for personnel. It can
also be used for hands-on ESD training that is essential
for a successful ESD management program.
Operation with Data Acquisition System (DAS)
DAS or FMS must be able to sample data from each
WS Aware Workstation Monitor in order not to miss
intermittent grounding problems. SCS provides a
portable or stationary DAS. Please contact a SCS Sales
Representative or an authorized distributor.
The WS Aware Workstation Monitor has the
following interface options:
Relay (RT model), 4-20mA (-3 model), and Modbus (-5
model).
Ground Indication
Status
Ground Disabled
Ground OK
Ground OK + EMI
(Tool grounds only)
Ground Fail
The following indication is available for each ground:
LED
Off
Green
Orange
Red
Buzzer
Off
Off
Off
On
SCS
- 926 JR Industrial Drive, Sanford, NC 27332 • (919) 718-0000 • Website:
StaticControl.com
TB-9033
Page 3 of 7
© 2015 DESCO INDUSTRIES, INC.
Employee Owned
If a long data cable is used, it is advisable to install
ferrite clamp-on chokes on both ends of the cable in
order to reduce electromagnetic interference induced on
cables. Please contact a SCS Sales Representative or
authorized distributor for proper selection of ferrite filters.
Pinout of RJ45 Connector
The WS Aware Workstation Monitor can work in a
standalone mode or connected to a DAS or a FMS.
Specifications
Properties
Wrist Strap Monitor
Wrist Strap Type
WS Connections
Number of Wrist Straps
Wrist Strap Voltage to
Ground
Remote Terminals
Body Resistance Alarm
Level
Indication/Alarm
Ground Monitor
CTC061
CTC062
Connection Activation
Tool Ground Alarm
Dissipative Ground Alarm
Operator Resistance
Operator Body Voltage
Mat Resistance
Tool Impedance
Connectivity
Analog Model
Relay Model
Digital Model
Data Connector
General
Power Supply
Dimensions (approx.)
Weight (approx.)
Values
Dual, 3.0 mm
2 megaohms
2
< 50mV peak-to-peak
2
±2.5V default
LED, Buzzer
Tools: 2 Connections
Mats: 2 Connections
Tools: 4 Connections
10 ohms default, DIP-
switch enable/disable
1 gigaohm default, DIP-
switch enable/disable
10 megohms (default)
±
2.5V (default)
1 gigohm (default)
10 ohms (default)
4-20mA
Logic level: 0 or 5V
RS485
RJ45 jack
Universal 100-240VAC,
0.6A, 50-60Hz
Output: 12VDC, 1.5A
3.2" W x 2.25" H x 1.30" D
(81 mm W x 57 mm H x 33
mm D)
0.3 lbs (130 g)
Figure 5. Front view of RJ45 jack.
PIN
1
2
3
4
5
6
7
8
RT
NC
NC
+12V
NC
NC
Ground
NC
4-20mA Interface
NC
NC
+12V
NC
NC
Ground
Monitoring output
(tool/mat)
Logic Out
Monitoring output
(operator)
RS485
NC
NC
+12V
TxD-/RxD-
TxD+/RxD+
Ground
NC
NC
Maintenance
Procedures for Cleaning and Decontamination
Unplug power from the device. Clean using a dry brush
or vacuum cleaner around the device. In case of contact
malfunction, clean contacts using a contact cleaner or a
brush and tighten all connections. Plug in the power.
Repairs and Servicing
Do not attempt to repair the product yourself. Contact
a SCS Sales Representative or Authorized Dealer to
request inspection and repair. Replace power supply
if damaged using only SCS supplied parts. Other than
replacement of remote jacks, do not attempt to service
the device. There are no user-serviceable parts.
Device Calibration
Contact a SCS Sales Representative or Authorized
Dealer to request for product calibration if needed.
SCS
- 926 JR Industrial Drive, Sanford, NC 27332 • (919) 718-0000 • Website:
StaticControl.com
TB-9033
Page 4 of 7
© 2015 DESCO INDUSTRIES, INC.
Employee Owned
Environmental Conditions
This equipment has been tested and found to be safe to
operate within these environmental conditions.
This is not a warranty of equipment performance within
these conditions.
•
Indoor use only
• Ingress Protection: IPX0
• Altitude: Up to 2,000 m
• Mains supply voltage fluctuations up to ± 10% of the
nominal voltage.
•
Transient over-voltages up to the levels of over
voltage category II.
•
Temporary over-voltages occurring on mains supply.
• Pollution degree: 2.
• Temperature: Maximum 110°F / 43°C Minimum
50°F/10°C
• Humidity: Maximum 80% relative humidity for
temperatures up to 31° C decreasing linearly to 50%
relative humidity at 40° C.
To reduce the risks associated with hazardous voltage:
• Use only the power supply provided by SCS and
specified for the country of use.
• Make sure that the WS Aware Workstation Monitor is
properly grounded.
• Do not simultaneously power the WS Aware
Workstation Monitor with the power supply and the
RJ45 data cable.
• Do not plug the WS Aware Workstation Monitor into
your 10/100BaseT Ethernet factory network!
•
Do not plug -3 versions into -5 interfaces and vice
versa, this may cause irreversible damage to the WS
Aware Workstation Monitor and FMS.
•
Do not use a longer screw to replace the supplied
parts.
•
Use only a dry cloth when cleaning.
Caution
To reduce the risks associated with environmental
contamination:
• Dispose of WS Aware Workstation Monitor and power
supply in accordance with all applicable local and
government regulations
Notice
To reduce the risk of damage to components or
assemblies being handled:
• WS Aware Workstation Monitor must be checked
periodically to verify each test mode is functioning
correctly.
• Ensure proper operation of WS Aware Workstation
Monitor by performing operational verification test as
required.
• Always properly ground your tools and dissipative
mats to known good ground before connecting WS
Aware Workstation Monitor for monitoring.
Safety Information
Read, understand, and follow all safety information
contained in these instructions prior to the use of this
device. Retain these instructions for future reference.
Intended Use
The WS Aware Workstation Monitor is intended for use
by electrical assembly personnel to monitor ground
impedance for process and equipment tools.
The WS Aware Workstation Monitor is both a wrist strap
monitor and a ground monitor. It provides operator
grounding, and monitors the resistance and body voltage
of personnel. It monitors the ground connection of two
dissipative mats and two tool grounds. It informs the
user when excess charge is present. The systems must
be installed as specified in this User’s Guide in an indoor
commercial/industrial environment, and have not been
evaluated for other uses or locations. If the equipment is
used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.
Warning
To reduce the risks associated with hazardous voltage
and fire:
•
Do not use the power supply if damaged. Replace
power supply if damaged using only SCS supplied
parts.
•
Do not attempt to service the power supply or
monitor, there are no user serviceable parts; return
to SCS for service.
• Do not position the monitor or other equipment
where unplugging the power supply is difficult.
Always locate the power socket or outlet near the
equipment. The power supply plug serves as the
disconnect device.
• Do not use the WS Aware Workstation Monitor or
its power supply outside of the operating conditions
listed in this user guide.
SCS
- 926 JR Industrial Drive, Sanford, NC 27332 • (919) 718-0000 • Website:
StaticControl.com
TB-9033
Page 5 of 7
© 2015 DESCO INDUSTRIES, INC.
Employee Owned
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