RC Systems ViewSmart 200 User manual

ViewSmart 200/2050/2150 Controller User's Manual
Document: UM-1021 Revision Level B
ViewSmart 200/2050/2150 DUAL CHANNEL
CONTROLLER
(Built with our Proven ST-90 Dual Channel Controller)
Warning: Read & understand
contents of this manual prior to
operation. Failure to do so could
result in serious injury or death.

ViewSmart 200/2050/2150 Controller User's Manual
Document: UM-1021 Revision Level B
SECTION 1...........................................................................................................1
IMPORTANT SAFETY ISSUES................................................................................................................ 1
1.0 GENERAL DESCRIPTION........................................................................................................... 2
1.1 DATA DISPLAY SCREENS.......................................................................................................... 3
1.1.1 MAIN DATA SCREEN................................................................................................................ 4
1.1.2 TREND SCREEN......................................................................................................................... 4
1.1.3 BLIND MODE SCREEN............................................................................................................. 4
1.2 SPECIFICATIONS:........................................................................................................................ 5
1.2.1 POWER SUPPLY REQUIREMENTS....................................................................................... 5
1.2.2 RELAYS........................................................................................................................................ 5
1.2.3 AMBIENT TEMPERATURE RANGE...................................................................................... 6
1.2.4 HUMIDITY RANGE ................................................................................................................... 6
1.2.5 ALTITUDE ................................................................................................................................... 6
1.2.6 HOUSINGS / INSTALLATION CATEGORIES...................................................................... 6
1.2.7 APPROVALS................................................................................................................................ 6
SECTION 2...........................................................................................................6
2.0 BASIC OPERATION...................................................................................................................... 6
2.1 SETUP MENU CONFIGURATION ............................................................................................. 7
2.2 CHANGING MENU VARIABLES USING THE KEYPAD....................................................... 9
2.2.1 ViewSmart 200 SETUP CONFIGURATION MENUS............................................................. 9
2.2.2 CHANNEL SETUP ENTRY MENU .......................................................................................... 9
2.2.3 ALARM 1 / ALARM 2 / ALARM 3 SET-UP MENUs.............................................................10
2.2.4 CONFIGURE MENU TO DEFINE CHANNEL......................................................................11
2.2.4a NAME / EUNITS ASCII DATA FIELDS .................................................................................11
2.2.4b INPUT MEASUREMENT RANGE...........................................................................................11

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2.2.4c DECIMAL POINT RESOLUTION...........................................................................................12
2.2.4d TURNING OFF UNUSED CHANNELS...................................................................................12
2.2.5 CAL SETUP MENU....................................................................................................................12
2.2.6 CALIBRATE INPUT MENU.....................................................................................................13
2.3 SYSTEM CONFIGURATION MENUS.......................................................................................14
2.3.1 RELAY 1 / RELAY 2 MENUS...................................................................................................15
2.3.2 HORN / PIEZO MENU ..............................................................................................................16
2.3.3 COMM PORT MENU ................................................................................................................16
2.3.4 CLOCK / DELAYS MENU........................................................................................................17
2.3.5 DIAGNOSTICS MENU..............................................................................................................18
2.4 SYSTEM SECURITY MENU.......................................................................................................19
SECTION 3.........................................................................................................20
3.0 MOTHERBOARD INTERFACE PCB # 10-0215.......................................................................20
3.1 INPUT / OUTPUT OPTIONAL PCB’s ........................................................................................22
3.1.1 OPTIONAL ANALOG INPUT PCB # 10-0221-2.....................................................................22
3.1.2 OPTIONAL BRIDGE / EC SENSOR INPUT BOARD #10-0216...........................................23
3.1.3 OPTIONAL BRIDGE SENSOR INPUT BOARD #10-0219 ...................................................24
3.1.4 BRIDGE SENSOR INITIAL SETUP........................................................................................25
3.1.5 OPTIONAL ELECTROCHEMICAL SENSOR INPUT BOARD #10-0220 .........................26
3.1.6 OPTIONAL DISCRETE RELAY PCB’s #’s 10-0222..............................................................27
3.1.7 OPTIONAL 4-20mA ANALOG OUTPUT BOARD #10-0223................................................28
3.2 MODBUS RS-232 / RS-485 INTERFACE OPTION 10-0253 ....................................................29
3.2.1 MODBUS REGISTER AND FUNCTION CODE SUMMARY..............................................30
3.3 OPTIONAL EXTERNAL 24VDC 50 WATT POWER SUPPLIES..........................................33
SECTION 4.........................................................................................................33
4.0 ViewSmart 200 N4 NEMA 4X WALL MOUNT ENCLOSURE................................................33

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4.1 ViewSmart 200 XP NEMA 7 EXPLOSION-PROOF WALL MOUNT ENCLOSURE...........35
4.2 ViewSmart 200 PY NEMA 4X POLYCARBONATE WALL MOUNT ENCLOSURE ..........36
4.3 ViewSmart 200 PCS NEMA 4 PAINTED STEEL WALL MOUNT ENCLOSURE................37
4.4 ViewSmart 200 SS NEMA 4X STAINLESS STEEL WALL MOUNT ENCLOSURE............38

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SECTION 1
IMPORTANT SAFETY ISSUES
The following terms and symbols are used in this manual to alert the operator of
important instrument operating issues:
This symbol signifies the system’s ground terminal
DC refers to direct current voltages.
VAC refers to alternating voltages.
WARNINGS:
Shock Hazard - Disconnect or turn off power before servicing this instrument.
NEMA 4X wall mount models should be fitted with a locking mechanism after
installation to prevent access to high voltages by unauthorized personnel (see
Figure 4.0).
Only the combustible monitor portions of this instrument have been assessed by
CSA for 122.2 No. 152 performance requirements.
This equipment is suitable for use in Class I, Division 2, Groups A,B,C and D or
non-hazardous locations only.
WARNING- EXPLOSION HAZARD- SUBSTITUTION OF COMPONENTS
MAY IMPAIR SUITABILITY FOR CLASS I, DIVISION 2.
WARNING- EXPLOSION HAZARD- DO NOT REPLACE FUSE UNLESS
POWER HAS BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE
NON-HAZARDOUS.
WARNING- EXPLOSION HAZARD- DO NOT DISCONNECT
EQUIPMENT UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA
IS KNOWN TO BE NON-HAZARDOUS.
Use a properly rated CERTIFIED AC power (mains) cable installed as per local
or national codes.
For DC powered units, DC power must be from a SELV rated source.
!
!
This symbol is intended to alert the user to the presence of important
operating and maintenance (servicing) instructions.
This symbol is intended to alert the user to the presence of
dangerous voltage within the instrument enclosure that may be
sufficient magnitude to constitute a risk of electric shock.
!
!

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A certified AC power (mains) disconnect or circuit breaker should be mounted
near the controller and installed following applicable local and national codes. If
a switch is used instead of a circuit breaker, a properly rated CERTIFIED fuse or
current limiter is required to be installed as per local or national codes. Markings
for positions of the switch or breaker should state (I) for on and (O) for off.
Clean using only a damp cloth with no solvents.
Equipment not used as prescribed within this manual may impair overall safety.
1.0 GENERAL DESCRIPTION
The R. C. Systems Co. Inc. ViewSmart 200 Two channel Controller is designed to
display, and control alarm event switching for two sensor points. Sensor signals may be
input as 4-20mA from transmitters, or, several signal conditioning options (see section
3.1) are available to accept sensors directly. The ViewSmart 200 is equipped with three
alarms per channel with features such as ON / OFF delays, latching relays and alarm
Acknowledge. A dedicated horn driver circuit for a local audible annunciator is also
standard. Two standard 5-amp alarm relays are configurable via the “alarm voting” menu
to make relays trip based upon various alarm combinations. Real-Time Clock and
Calendar are also standard. Options such as 4-20mA outputs, discrete relays for each
alarm and audible annunciators are easily added. RS-485 (Modbus RTU) or Ethernet
(Modbus TCP) ports are also available for sending data to PC’s, PLC’s, DCS’s, or other
R. C. Systems controllers.
A 128 x 64 pixel graphic LCD readout displays monitored data as bar graphs, 30-minute
trends and engineering units. System configuration is via user friendly menus and all
configuration data is retained in non-volatile memory during power interruptions. The
ViewSmart 200 front panel is shown below in Figure 1.0 displaying the bar graph data
screen. The five button symbols below the display are magnetically activated using the
supplied magnetic wand without opening the enclosure. Opening the enclosure door
provides access to the “touch” keypad as shown in Figure 1.1.

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Figure1.0
Figure1.1
1.1 DATA DISPLAY SCREENS
The ViewSmart 200 Controller offers three modes for displaying monitored data. Each
are shown below in Figure 1.2.

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Figure 1.2
1.1.1 MAIN DATA SCREEN
The ViewSmart 200 Main Data screen shown at left in Figure 1.2 allows each channel to
be viewed simultaneously. Engineering unit values and bar graph values are both
displayed in real time. Arrows below the bars indicate alarm trip point values, making it
easy to identify channels at or near alarm. The direction the horizontal 45 degree arrow
side points indicates either a HIGH or LOW trip as illustrated in Figure 1.1 where Ch 1
points right indicating high level trips and Ch 2 points left indicating low level trips. Left
and Right hand arrows located at the ends of each bar graph point towards Channel
Alarm LED’s on the front panel associated with this reading. The 10-digit ASCII fields
for identifying engineering units and Channel ID for each channel are also shown on the
Main Data screen.
1.1.2 TREND SCREEN
In addition to the Main Data screen described above, the ViewSmart 200 also provides
30-minute trend screens for each channel as shown in Figure 1.2. Data screens are
selected by the NEXT key.
1.1.3 BLIND MODE SCREEN
The ViewSmart 200 Blind Mode screen shown at right in Figure 1.2 does not allow
viewing of channel engineering unit values. It only indicates the system’s alarm status
and time / date. Some applications require only alarm status be displayed and prefer
monitored values not be shown. A SECURITY menu (see section 2.40) allows locking

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all configuration parameters and having only the Blind Mode screen available for
viewing.
1.2 SPECIFICATIONS:
1.2.1 POWER SUPPLY REQUIREMENTS
ViewSmart 200 primary power may be either 10-30 VDC or 100-240VAC. AC power
requirements are 100-240 VAC 50/60 Hz @ .80 amp max (including inrush) and 40 watts
max steady state, applied to TB5 on the motherboard. If AC power is not available the
primary power may be 10-30 VDC applied to TB1 on the motherboard. A back-up DC
power source may also be connected to TB1 for automatic switchover if the AC power
source fails. See Figures 3.0 & 3.1 for wiring information.
The basic ViewSmart 200 consumes only 1.5 watts of 10-30 VDC power. Optional
features such as relays and analog outputs increase power consumption as described
below:
10-0221-2, Analog Input PCB option; add wattage for each monitor connected to
this board’s 24 VDC terminals.
10-0222, Discrete Relay PCB option; add 1.5 watt.
10-0223, 4-20mA Output PCB option; add .5 watt.
10-0219, Bridge Sensor Input PCB option; add wattage of each sensor attached.
With an AC primary power source connected to TB1 on the motherboard, TB3 terminals
1 & 2 on the motherboard provide a maximum of 12 watts output power for powering of
auxiliary external devices such as relays, lights and monitors (see Figure 3.0). Power
consumed from TB3 must be included when calculating system power consumption.
IMPORTANT! TB3 only provides 24VDC power when AC is primary power.
24 VDC terminals on the 10-0221 Analog input option (see Figure 3.3) may also be used
to power external transmitters and these loads must be calculated into the overall power
budget. These terminals receive power from both the integral AC / DC power supply and
the external TB1 supply as shown in Figure 3.0.
Some applications may require 24VDC power in excess of that available from the
ViewSmart 200’s integral AC power supply and thereby require an external AC/DC
supply. NEC Class 2 FIFTY WATT external supplies are available for Division 1 (part #
10-0314) and Division 2 (part # 10-0315) potentially hazardous area installations and
both also include a NEMA 4X weather rating.
1.2.2 RELAYS
Two mechanical (dry contact) Common Form C relays are standard and may be mapped
to various alarm events as described in section 2.3.1. ViewSmart 200s may also be
equipped with optional solid-state common Form A relays (see order guide for details) in
applications requiring non-arcing switching. Solid-state relays are recommended for
switching of highly inductive loads.

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A six mechanical (dry contact) Discrete Relay option board (see section 3.1.6) provides
dedicated Form C relays for ALARM 1, ALARM 2 and FAULT for both channels.
All mechanical (dry contact) relays are rated at 5 Amp for 28 VDC and 250 ~VAC
RESISTIVE loads. IMPORTANT: Appropriate diode (DC loads) or MOV (AC
loads) snubber devices must be installed with inductive loads to prevent RFI noise
spikes.
Optional solid state relays are rated at 2 Amp 12-280 ~VAC (600Vpk).
Relay wiring should be kept separate from low level signal wiring.
1.2.3 AMBIENT TEMPERATURE RANGE
-25 to 60 degrees C
1.2.4 HUMIDITY RANGE
0 TO 90% R. H. Non-Condensing.
1.2.5 ALTITUDE
Recommended up to 2000 meters
1.2.6 HOUSINGS / INSTALLATION CATEGORIES
*NEMA 4X wall mount. DIV 2 Groups A,B,C,D; Category II and pollution degree
3; NEMA 4X; IP66
*NEMA 7 wall mount for DIV 1 & 2 Groups B,C,D; includes ‘O’ Ring in door to
satisfy NEMA 4 rating.
*Includes standard non-intrusive magnetic keypad.
1.2.7 APPROVALS
CSA C22.2 No 1010.1 and ISA S82.02; CSA C22.2 No 152 for combustibles; UL 1604 /
C22.2 No 213 (Div 2 Groups A,B,C,D); EN55011 & EN61000 (CE Mark). CSA File # =
219995 and may be seen at: CSA-International.org.
SECTION 2
NOTE: The models ViewSmart 2150 and ViewSmart 2050 add a large LED
display to the ViewSmart 200, but otherwise function identically to the ViewSmart
200. For this reason, this manual will simply refer to the operation and installation
of a ViewSmart 200, but will be identical for the other two models.
2.0 BASIC OPERATION
The ViewSmart 200’s graphic LCD displays monitored data and with the 5-button
keypad also serves as the system’s operator interface. All ViewSmart 200 configuration
variables are entered with this operator interface using SETUP menus accessed by
pressing EDIT from either data screen. This Setup mode may be exited manually by
pressing NEXT, or automatically when no keys are pressed for 5 minutes. Alarm relays
and front panel alarm LED indicators remain active during the Setup mode. Alarm
!
!
!

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LED’s flash upon new alarms and become steady after Acknowledged by pressing the
ALARM RESET key. A SECURITY menu offers a password feature to prevent
tampering with ViewSmart 200 parameters.
Several signal conditioning input options are available to allow the ViewSmart 200
accept sensor and other analog signals directly (see section 3.1). A “sign-on” screen
appears briefly after power is applied that indicates what type input / output options the
unit is configured with.
2.1 SETUP MENU CONFIGURATION
Variables inside the CHANNEL (see section 2.2) and SYSTEM (see section 2.3) menu
trees allow ViewSmart 200 configuration for a wide range of monitoring applications.
Select the desired menu by scrolling with UP/DOWN and then EDIT to enter each
menu. Figure 2.0 illustrates the menus tree for configuring Channel variables on its right
side and System specific variables on the left side. Channel variables affect only the
specific channel selected while System variables are related to features not specific to
either channel.

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Figure 2.1 ViewSmart 200 Menu Tree

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Figure 2.0
2.2 CHANGING MENU VARIABLES USING THE KEYPAD
Upon entering a menu, a pointer controlled by the UP/DOWN keys indicates the selected
variable. Some are simple YES/NO or ON/OFF entries toggled by pressing the EDIT
key. Others, such as Channel ID and Eunits fields may have many ASCII character
possibilities. Allowed ASCII characters are as follows:
ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz blank
space !”#$%&`()*+,-./0123456789:;<=>?@. Notice the often used blank character is
located after lower case zand before the exclamation point !. EDIT places a cursor
under the item and UP/DOWN scrolls through each allowed entry. The NEXT key
moves the cursor to the next position within a field. When the field is complete, EDIT
clears the cursor and loads the field into non-volatile memory where it is retained
indefinitely. Without a cursor present, the NEXT key closes open menus in reverse order
and returns the LCD to the data display.
2.2.1 ViewSmart 200 SETUP CONFIGURATION MENUS
The SETUP menu shown in the middle of Figure 2.0 and in Figure 2.1 below is reached
by pressing EDIT with any data display present. This is the entry-level screen to ALL
Channel, System and Security menus. It also shows the revision of firmware operating in
the ViewSmart 200. Use the UP/DOWN keys to move the pointer to the desired menu
and press the EDIT key.
Figure 2.2
2.2.2 CHANNEL SETUP ENTRY MENU
The CHANNEL menu shown below in Figure 2.2 allows configuration of all variables
for the selected channel. These are Alarm 1, Alarm 2, Alarm 3, Configure and
Calibrate.

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Figure 2.3
2.2.3 ALARM 1 / ALARM 2 / ALARM 3 SET-UP MENUs
Alarms 1, 2 and 3 have identical menus. The only difference between each is A1 front
panel LED indicators are yellow while A2’s and A3’s are red. Typical applications often
have A1 set at a WARN level, A2 at a HIGH level and A3 at a negative FAULT level.
However, it is important to understand there is no functional difference between A1, A2
and A3. Since their configuration menus are identical, only one is shown in Figure 2.3.
Figure 2.4
Set Point is entered in engineering units and determines the value where the alarm
trips. For example, if a channel monitors 0-50 ppmH2S and the desired alarm level is
10 ppm, the correct entry is 10.00. A one percent dead band prevents alarm chatter.
This means after tripping an alarm the input must move at least 1% of full scale back
through the setpoint for the alarm to auto reset.
The ON Delay / OFF Delay entries allow ON and OFF time delays affecting how
long the trip-point must be surpassed before an alarm event transition occurs. ON
delays are limited to 10 seconds while OFF delays may be as long as 120 minutes.
Delays are useful in many applications to prevent nuisance alarms and unwanted
cycling into and out of alarm conditions.

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Low Trip is set for NO for increasing alarms or YES for decreasing alarms to
determine if the alarm activates upon exceeding or falling below the set-point.
Latching determines either manual or automatic alarm reset operation. YES
requires a manual Alarm Reset to unlatch the alarm even though an alarm condition
no longer exists. YES also causes this alarm’s common relay, front panel LED, and
optional discrete relay to latch. NO allows all outputs for this alarm to automatically
reset after the alarm condition clears.
Discrete LED indicators on the front panel indicate the status of each alarm. Any new
alarm event causes the associated LED to flash until an Alarm Reset occurs causing an
acknowledged steady on condition. Operators should recognize new alarms by a flashing
LED. Alarm Reset also acknowledges, or deactivates, audible devices driven by the
AUDIBLE ALARM option connector J2 (see Figure 3.1)
2.2.4 CONFIGURE MENU TO DEFINE CHANNEL
The channel setup menu after the alarm menus is CONFIGURE. It allows setting Name
and EUNIT ASCII fields, defining the measurement range, and how many decimal points
of resolution the reading will have.
Figure 2.5
2.2.4a NAME / EUNITS ASCII DATA FIELDS
The first two items in this menu are for entering the 10 character channel Name and
engineering unit ASCII fields. Name should describe the channel’s data in user
terminology such as tag # or other description. Eunits should define the units of measure
for what this channel is to display. Several standard Eunits fields are available by
pressing EDIT but if these are inappropriate, a CUSTOM field allows editing of each
character. Section 2.2 describes how to modify these fields using the keypad.
2.2.4b INPUT MEASUREMENT RANGE
The ZERO / SPAN menu entries allow configuration of the measurement range
displayed by this channel. Measurement Range defines the range of the input signal’s
engineering units. For example, if a channel’s input is 4-20mA from a transmitter

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monitoring 0 to 10ppm chlorine, then the Zero value should equal 0.000 and the Span
value equal 10.00. Four digits must be entered so trailing 0’s may appear here that are
not displayed on other data screens.
2.2.4c DECIMAL POINT RESOLUTION
Resolution of the displayed channel value is configured in this menu by setting the
number digits trailing the decimal point. Displayed readings are limited to a maximum of
four digits with a polarity sign. Auto-ranging displays the highest resolution allowed by
this menu’s decimal point entry. For example, a range of 0 to 100ppm and two decimal
points reads 0.00 at 0ppm and 100.0 at 100ppm. This may be undesirable due to the high
resolution at zero unless the sensor’s output is extremely stable. If decimal points are
limited to one, the 0ppm reading becomes 0.0 and the 100ppm reading remains 100.0.
Resolution may be limited further by setting decimal points to 0 where in the above
example, 0ppm reads 0and 100ppm reads 100.
2.2.4d TURNING OFF UNUSED CHANNELS
The Channel Active? menu entry asks if this channel is to be utilized. OFF causes the
controller to never process inputs applied to this channel and no alarms are tripped or
data displayed. Inactive channels have a line drawn through them on the Setup screen to
indicate it is turned off.
2.2.5 CAL SETUP MENU
The ViewSmart 200 CAL MODE feature supports pushbutton calibration of zero and
span values. This feature should be utilized only when there are no other zero/span
controls within the monitoring system since it is inappropriate to calibrate a signal at
more than one point. Therefore, if calibration will be performed at another transmitter or
monitoring device, the ViewSmart 200 CAL MODE feature should not be used.
The CAL SETUP menu allows entering the correct Zero Gas & Span Gas set-point
values needed to calibrate the sensor. These are entered in the same engineering units as
input range.
Figure 2.6

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2.2.6 CALIBRATE INPUT MENU
Calibration is the most important function for insuring correct operation of ViewSmart
200’s equipped with sensor inputs. The CAL MODE (flow chart shown in Figure 2.6) is
designed to make calibration quick, easy and error free. A successful ZERO and SPAN
calibration requires only five keystrokes. Optional 4-20mA outputs (if equipped)
transmit 1.5mA during CAL MODE and 4mA during the subsequent CAL PURGE delay
to prevent external alarms during calibration. Local ViewSmart 200 alarm relays are
inhibited during CAL MODE. Unintentional calibrations may be reset by the Set
UNITY menu item. Set UNITY resets Cal OFFSET to 0 &Cal GAIN to 1 which is
useful for returning the calibration to a known starting place. Sensor aging may be
monitored by recording zero and span readings at Unity Gain when the sensor is new,
and again later when degradation may have occurred. CAL MODE automatically exits if
no keystroke is detected after 5 minutes.
Follow these ViewSmart 200 sensor calibration guidelines:
Calibration accuracy is only as good as the calibration standard accuracy. R. C.
Systems recommends calibration standards with NIST (National Institute of
Standards and Technology) traceable accuracy to increase the validity of the
calibration.
Do not use a gas cylinder beyond its expiration date.
Calibrate a new sensor before use.
Allow the sensor to stabilize before starting calibration (approximately 5
minutes).
Calibrate on a regular schedule. (R. C. Systems recommends once every 3
months, depending on use and sensor exposure to poisons and contaminants.)
Calibrate only in a clean atmosphere free of background gas.
Use the following step-by-step procedure to perform ZERO and SPAN calibrations.
1. To enter the CAL MODE from any data display, press the dual purpose DOWN /
CAL key and within 5 seconds press the EDIT key.
2. Using the Cal-Cup and following the instructions on the screen, apply a clean
ZERO gas or be sure there is no background target gas in the monitored area.
After the reading is stable, (approximately 1 minute) press the EDIT key to
perform a ZERO calibration.
3. If the ZERO calibration is successful, CAL MODE automatically proceeds to the
SPAN check.
4. Apply the correct SPAN gas at .5 liters/min. After the reading is stable,
(approximately 1 minute) press the EDIT key to perform a SPAN calibration.
WARNING: The SPAN gas used must match the value specified since this is
what the ViewSmart 200 will indicate after a successful SPAN calibration. The
Span Gas value may be edited if it becomes necessary to apply a different gas
concentration (see Span Gas in section 2.2.5).

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5. If the SPAN calibration is successful, the display flashes “REMOVE CAL GAS”
and starts the CAL PURGE delay.
6. CAL MODE will be complete after the end of the CAL PURGE delay.
The flow chart in Figure 2-6 illustrates the above procedure. UP, CAL, NEXT & EDIT
labels indicate keystrokes (CAL/DOWN is a dual purpose key). The CAL MODE
information screen (top of the chart) is available for advanced users to see Offset / Gain
calibration constants and live analog to digital converter (A/D) counts. Span Gas
calibration values may also be edited from this screen. Holding the UP key, for 5
seconds during CAL MODE, displays this screen.
Unity Gain may be used at anytime to cancel incorrect calibrations and start again.
Figure 2.7
2.3 SYSTEM CONFIGURATION MENUS
Several items needing configuration are not specific to either channel but affect the entire
ViewSmart 200 system. These are located in the system tree entry menu shown on the
left side of Figure 2.0. System menus are accessed by pointing to the desired item and
pressing EDIT. The Diagnostics menu group (section 2.3.5) is useful for testing relay
and analog I/O without stimulating the input.
Figure 2.8

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2.3.1 RELAY 1 / RELAY 2 MENUS
The Relay 1 & Relay 2menus are identical except Relay 2 has an acknowledge feature
useful if it controls an audible device. All other Relay 1 & Relay 2 features are
identical and therefore are discussed only once.
Figure 2.9
The Set Relay Logic menu shown below in Figure 2.9 offers additional “voting”
flexibility by controlling the channel alarm combinations that will trip this common
alarm relay. “OVR” on the menu’s right side stands for override and means ANY of
the selected alarms will activate the relay. The “OR” / “AND” columns work
together based upon the following logic equation:
[AND column selections] ANDED WITH [OR column selections] = relay
activation.
For example, if Ch1A1 & Ch2A1 are selected in the AND column and Ch1A2 &
Ch2A2 are selected in the OR column, the logic equation is [Ch1A1 AND Ch2A1]
ANDED WITH [Ch1A2 OR Ch2A2]. This requires both A1’s along with either A2
to activate the relay.
Figure 2.10

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Failsafe controls relay activation for the common relays. Failsafe ON causes these
relays to de-energize during alarm conditions and energize when there is no alarm.
With Failsafe active, a power failure forces the relay contact to the alarm position.
Horn controls how activating this relay will affect the horn driver circuit connected
to J2 on the motherboard. Choices are NO, STEADY or PULSE. Warning level
alarms might be set to pulse the horn with high alarms set for steady. Personnel then
know which alarm level is present by hearing the pulsing or steady horn.
Turning Acknowledge ON (not allowed on Relay 1) allows Relay 2 to be
deactivated during alarm conditions by an Alarm Reset. This is useful if another
audible device is being driven by the relay. The acknowledge feature is not available
for Relay 1 since it is often used for driving a warning light and Relay 2 for driving a
horn. It could be dangerous if an operator acknowledged the horn AND the light
since no indication of the high alarm condition remains.
2.3.2 HORN / PIEZO MENU
The ViewSmart 200 display PCB is equipped with a small audible piezo that chirps
when keys are pressed providing an audible feedback to the operator. It also may be
set to audibly indicate alarm conditions by entering YES into the Piezo On menu
item in Figure 2.10. This piezo will then mimic the Horn settings menus described
in section 2.3.1.
The Horn ACK menu item determines if the Horn Driver output may be
acknowledged by an Alarm Reset. YES causes an Alarm Reset to silence the horn
even though an alarm condition remains active.
Figure 2.11
2.3.3 COMM PORT MENU
The system Comm Port menu allows setting RTU address for the optional slave
Modbus serial port. This slave port may be used to transfer ViewSmart 200 data to a host
device such as a PC, PLC, DCS or even another R. C. Systems Controllers. The slave