762C Series SINGLE STATION MICRO® Controller

762C Series SINGLE STATION MICRO® Controller
®
Product Specifications
PSS 2C-1A1 D
762C Series SINGLE STATION MICRO® Controller
The 762C Series Controller is a multi-purpose station with the ability to accomplish one or two independent
control strategies concurrently. It can also be configured as one or two 3-variable indicator stations and one or
two auto/manual transfer stations. Control, indicator, and auto/manual functions are intermixable. As symbolized
by the “CE” marking, these controllers conform to the European Union directives.
INTRODUCTION
The 762C is a microprocessor-based controller that
performs the standard proportional, integral, and
derivative (PID) control functions for up to two
independent loops. Additionally, it provides many
enhanced functions including Foxboro’s patented
EXACT tuning algorithm, user-configurable control
functions, auto selector control, split range outputs,
auto/manual transfer stations, assignable 3-variable
indicator functions, totalization, a comprehensive
calculation capability, and signal conditioning.
Standard controller signals include:
four analog inputs, two frequency inputs, two contact
inputs, an optional platinum RTD direct input, two
analog outputs, and two contact outputs.
A fluorescent display is used to show the control
variables in bargraph format, and to provide precision
digital readout. It also displays an electronic loop tag,
controller status, and alarm indication. A keypad,
located on the front of the controller, is used for
operator interface and configuration.
The controller is available for mounting directly in a
panel or in Foxboro shelves.
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FEATURES
• Two Independent PID Controllers
• Single Station Cascade Control
• Single Station Auto Selector Control
• Split Range Outputs
• Ratio Control
• Batch (Discontinuous) Control
• Totalization
• 3-Variable Indicators
• Auto/Manual Transfer Stations
• Assignable Alarms
• Algebraic Computation
• Dynamic Compensation with Lead/Lag, Impulse,
and Dead Time Functions
• Boolean Logic Capability
• EXACT Control (Foxboro U.S. Patent RE 33267)
• Flexible Configuration Blocks with Internal Signal
Routing
• Fully Interactive Display
• Configuration and Display of an Independent
Variable
• Pulse Driven Input
• RS-485 Serial Communications for Operation
and Configuration
• Nonvolatile Memory
• Transportable Configuration
• Power Failure Recovery Logic
• Front Panel Keypad for Both Configuration and
Operator Interface
• Internal Signal Sources for Calibration
• Integral Field Power Supply
• Passcode Security
• DIN or Shelf Mounting
TWO INDEPENDENT CONTROLLERS
Two completely independent control strategies can be
used. All control support functions are available for
both controllers, thereby allowing high-performance,
enhanced control of each loop.
CASCADE CONTROL
With this controller configuration, the output of one of
the controllers (primary controller) drives the set point
of the other (secondary) controller. This configuration
can improve the performance of certain control loops
where load disturbances are a factor.
AUTO SELECTOR CONTROL
Two controllers with a single selected output are
combined in this configuration to provide constraint
control or dual mode control. The choice of lower,
higher, or logic-selected output is configurable. The
inherent design prevents controller windup and offers
independent or interlocked auto/manual functions.
SPLIT RANGE OUTPUTS
The two 4-20 mA outputs can be driven from a single
controller. This allows one measured variable to be
controlled by two manipulated variables. A typical
application is a temperature control system in which
both the heating medium and the cooling medium are
manipulated.
ACTUAL OUTPUT INDICATION
The output bargraph and digital indicator can be
configured to display the actual 4-20 mA output value,
or any analog signal, such as valve position feedback.
TOTALIZERS
Up to two 7-digit totalizers are available. The
totalizers can be set to integrate up to a preset value
or down from a preset value, and produce a logic
event output. Any internal or external signal can be
totalized.
Totalization and EXACT tuning are mutually exclusive.
For example, if one controller is configured for EXACT
tuning, only one totalizer is available.
EXACT CONTROL
EXACT control uses microprocessor technology to
make ongoing controller adjustments based on the
actual, real time process dynamics. This is in direct
contrast to other “self-tuning” controllers that establish
the values of tuning parameters based on an arbitrary
process model.
While continuously scanning the process variables,
EXACT control initiates corrective action upon
sensing a process upset. The user selects the
desired response by specifying the desired damping
and overshoot-to-load change, such as quarter
amplitude damping.
Values of EXACT can be read by the user.
EXACT control functions as if your best operator is on
the job 24 hours a day. It can be turned on or off at
the keypad or by configuring logic functions, allowing
these controllers to function as advanced PID
controllers.
EXACT control is available on both control loops.
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3-VARIABLE INDICATOR
Up to two 3-variable indicator faceplates are available.
Each variable has its own bargraph, digital
engineering units, and loop tag. The 3-variable
faceplates are mutually exclusive with controllers and
auto/manual stations. If only one controller or manual
station is configured, one 3-variable faceplate will be
available.
AUTO/MANUAL TRANSFER STATION
Up to two auto/manual stations are available.
Auto/manual stations are mutually exclusive with
controllers and indicators. For example, if only one
controller or indicator is configured, one auto/manual
station will be available.
PULSE DRIVEN INPUT
There is provision for two pulse inputs, forming a
pulse up/pulse down pair that can be assigned to any
scaled signal such as remote set point. This function
is compatible with the signals used for older stepping
motor type devices.
RS-485 SERIAL COMMUNICATIONS INTERFACE
This controller is equipped with an RS-485 serial port
for communication with most host computers, either
directly or via an RS-232/RS-485 converter or
equivalent accessory. Protocol conforms to ANSI
Specification X3.28-1976, Subcategory E3. Using the
Foxboro Model F6501A Converter, up to
90 controllers can be accommodated with a single
host communication port.
Serial communications capability includes
uploading/downloading of configuration, setting of
Auto/Manual (A/M) or Remote/Local (R/L) status and
manual output and local setpoint values, polling of all
inputs, outputs, and totalizers, and writing as well as
reading of all configurable parameters. Both control
loops are accommodated. The user can also select
parity and panel, workstation (host), or “both” priority.
Communications rate is configurable for 2400, 4800,
9600, or 19,200 baud.
COMPUTATIONAL CAPABILITY
This controller performs up to three independent
calculations. The variables may include the results of
other calculation blocks, scaled and conditioned
inputs, and other internal control signals.
An equation is entered from the keypad one character
at a time following the usual rules of algebra and a
few easy-to-learn rules. The result of this flexibility is
exceptional computational capability in a single
station controller.
SIMPLIFIED CONFIGURATION AND OPERATION
Because of its flexibility, this controller is easily
configured to meet the most exacting process
requirements. All operating functions are examined
and/or changed by keystrokes. Interactive prompting
simplifies setting the adjustable parameters.
COMPLETE SECURITY
The operator has keypad access to read the values of
inputs, alarm and limit settings, and the operating
configuration. However, the operator can adjust only
those settings which were specified as operatoradjustable when the controller was configured. A
passcode must be entered from the keypad to enable
adjustment of the remaining parameters.
This passcode is determined by an authorized person
at the time the controller is configured. Thus, only
those who have been given this passcode can
change any of the protected parameters.
BOOLEAN LOGIC CAPABILITY
There are five single gates and five dual gates. Each
gate is configured by selecting the logic and then
selecting the source of each input. Gates 0 through 4
are the single input gates and are configured DIRECT
or NOT by the user. Gates 5 through 9 are the dual
input gates and the user selects one of the following
logic types for each one: OR, NOR, AND, NAND,
XOR, or XNOR.
DYNAMIC COMPENSATION
The result of a dedicated calculation block can be
passed through a dynamic compensator, prior to
distribution. The dynamic compensator provides
lead/lag, impulse, and dead time functions, each with
its individual follow (bypass) switch. Functionally,
dead time precedes lead/lag and is the input to the
lead/lag function.
Utilizing the dynamic compensator and the follow
switches, feedforward and other complex control
applications are easily and efficiently handled.
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FRONT PANEL
and center bargraphs are 5 mm (0.196 in) wide, and
the right bar graph is narrower at 2.5 mm (0.098 in).
The bargraphs are colored Blue-Green.
The controller can be configured and operated
entirely from the front panel without need for any
external equipment. The panel consists of an
alphanumeric display, a graphics display, status
indicators, an alarm indicator (horn symbol), and a
keypad. Refer to Figure 1.
The alphanumeric display at the top of the front panel
has two lines of nine characters each. The characters
are 5 mm (0.196 in) high, and colored Blue-Green.
The graphics display consists of three bargraghs,
each having 50 segments plus a pointer on top and
bottom. The bars are 55.4 mm (2.18 in) long. The left
ALPHANUMERIC
DISPLAY:
LOOP TAG
VARIABLE
SELECTED
DISPLAY
STATUS
The status characters (W/P, R/L, A/M) are 4 mm
(0.157 in) high; the alarm symbol is 5 mm (0.196 in)
high. The status characters are colored Blue-Green;
the alarm symbol is Red.
The keypad has eight keys as shown in Figure 1 and
identified in Table 1 on page 5. The key switches are
single pole, normally open contacts, all closing to a
common lead.
3-VARIABLE
INDICATOR
DISPLAY
CONTROLLER
DISPLAY
FIC 1002A
160.6 GPM
P
FIC 1002A
150.5 GPM
WORKSTATION/PANEL
(COMPUTER/LOCAL)
STATUS
P
BARGRAPHS
(LEFT TO RIGHT):
• SET POINT
• MEASUREMENT
• OUTPUT
MEASURED VALUE AND
ENGINEERING UNITS
BARGRAPHS
(LEFT TO RIGHT):
• SIGNAL 1
• SIGNAL 2
• SIGNAL 3
REMOTE/RATIO/LOCAL
STATUS
L
A
AUTO/MANUAL
STATUS
AUTO/MANUAL
TRANSFER STATION
DISPLAY
TOTALIZER TAG
T 103
47965.2
OPERATION AND
CONFIGURATION
KEYPAD
INDICATOR TAG
W/P
R/L
A/M
SEL
TAG
ACK
ALARM
STATUS
P
M
Figure 1. Controller Front Panel
TOTALIZED VALUE
BARGRAPHS
(LEFT TO RIGHT):
• INPUT
• OUTPUT
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COPY MEMORY FEATURE
This optional copy memory feature permits the
configuration of one controller to be duplicated for use
in another controller. This is accomplished using two
NOVRAMs (nonvolatile, random access memory
modules) and a configuration copy accessory. Briefly,
after turning off the power, the procedure is as
follows: remove the configured NOVRAM from the
controller; install the copy accessory; plug the
configured NOVRAM and a second NOVRAM (to be
configured) into the copy accessory; then turn on the
power and the second NOVRAM is copied for use in
another controller. With minimum effort, any number
of controllers can thus be configured with the same
parameter values as the original controller. Then
individual parameters in each controller are easily
changed to fit the particular loop.
Table 1. Keypad Description
Key
Name
TAG
ACK
SEL
W/P
A/M
R/L
Usage of Key
Depression when the Controller is in the PANEL (P) mode, causes the Controller to exit from the
operator FACEPLATE and enter the READ or SET menu. When the Controller is in the
WORKSTATION (W) mode, the TAG is disabled.
In FACEPLATE mode, if an alarm has not been acknowledged, depression of the ACK key will
remove the alarm from the Alarm indicator flashing queue and put alarm into the Alarm indicator
steady queue. In READ or SET mode, depression of this key accepts an entry, stores a variable,
and/or steps forward to the next function. ACK is functional whether in W or P mode.
In FACEPLATE mode:
Short Depression (0.1 to < 0.3 s):
Moves through variables being displayed on bargraphs, displaying each, in turn, on lower
alphanumeric display. Also provides access to remote set point, ratio, and totalized count,
provided these have been configured.
Long Depression (0.3 s):
Toggles between faceplates of the two controllers, indicators, and auto/manual stations, provided
they are configured and active. Otherwise, same action as if it were a Short Depression.
In READ or SET mode, depression steps backward to the previous function.
The SEL key is independent of whether Controller is in W or P mode.
Controller Status Switch; toggles between Workstation (W) and Panel (P) operation. This key is
functional only when Workstation/Panel is configured and the W/P switch is configured to NONE. It
is non-functional when the controller is configured for “W” priority.
Controller Status Switch; toggles between Auto (A) and Manual (M) operation. This key is
functional only when the A/M switch is configured to “NONE”. It is non-functional when Controller is
in “W” mode. The bargraph pointer indicator will automatically preselect the Output Bargraph when
transferring to “M”, and the Measurement Bargraph when transferring to “A”.
Controller Status Switch; toggles between Remote or Ratio (R) and Local (L) setpoint operation.
This key is functional only when remote set point is configured and R/L switch is configured to
“NONE”. The key is non-functional when Controller is in “W” mode.
Up and Down arrows are bidirectional movement requestors. They are used to select menu items
and functions, reconfigure parameters, and make changes to the set point and the manual output
value.
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OPERATING AND STORAGE CONDITIONS
Reference
Operating
Conditions
Influence
Ambient
Temperature
Relative
Humidity
Supply
Voltage
Supply
Frequency
Vibration
Normal Operating
Condition Limits
Operative Limits
Transportation and
Storage Limits
-10 and +60°C
(14 and 140°F)
5 and 95%
(noncondensing)
V ac, +10, –15%
V dc, +10, –15%
-10 and +60°C
(14 and 140°F)
5 and 95%
(noncondensing)
V ac, +15, –20%
V dc, +10, –15%
–40 and +70°C
(–40 and +160°F)
0 and 100%
(noncondensing)
—
—
50/60 Hz, ±3 Hz
40 and 65 Hz
—
5 and 200 Hz
at an acceleration
of 2.5 m/s 2
—
—
10 m/s 2 (1 “g”) for
1 hour when in
shipping container
A 42 inch drop when
in shipping container.
23 ±2°C
(73 ±3°F)
50 ±10%
24, 100, 120, 220 and
240 V ac, ±1%
24 V dc, ±1%
50/60 Hz, ±0.1 Hz
Mechanical
Shock
Negligible
Negligible
—
PERFORMANCE SPECIFICATIONS
Accuracy at Numeric Display
See the table below.
Output Noise
0.25% maximum, peak-to-peak.
Numeric Display Accuracy Table
Parameter
Accuracy
Humidity Effect
Maximum error in any conversion, calculation, or
setting is ±0.1% of span for a change from reference
conditions to 95% R.H. at 30°C (85°F) wet bulb.
Set Point
Input
Analog
RTD (Direct Meas.)
Output
Linearization
RTD
Thermocouple
±0.1% of span
±0.1% of span
±0.5°C
±0.5% of span
±0.5°C, reading only
±0.5°C, reading only
Resolution
DISPLAY
±0.1% of upper range value
BARGRAPH
±2% of upper range value
Frequency Response
Analog input to output conversion is flat to 3 Hz.
Supply Voltage Effect
±0.1% of span (maximum) for a +10% or –15%
change in ac or dc voltage within normal operating
conditions.
Ambient Temperature Effect
Maximum error in percent of span, except as noted,
for a 30°C (55°F) change in temperature within
normal operating limits. See table below.
Parameter
Set Point
Local
Remote
Input
Analog
Frequency
RTD
Outputs
Maximum Error
less than 0.1%
less than 0.5%
less than 0.5%
less than 0.25%
less than 0.5°C
less than 0.5%
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FUNCTIONAL SPECIFICATIONS
Proportional Input Signals
Any combination of the following proportional inputs; not to exceed four analog (4-20 mA, 1-5 V, TC, or RTD)
and two frequency inputs. All input signals are converted ten times per second and can be characterized or
combined in a variety of calculations. See table below.
Proportional
Type Input Signal
Maximum
Number
4 to 20 mA dc
Current Input
1 to 5 V dc
Voltage Input
Thermocouple Input
(requires 893 Temperature
Transmitter, or equivalent)
4
1 to 9999 Hz
Frequency Input
2
1 to 9999 Hz Pulse Up/
Pulse Down Inputs (Uses
both Frequency Inputs.)
Resistance Temperature
Detector (RTD) Input,
Direct or Temperature
Difference Measurement.
See Model Code section
to select this optional RTD
input.
4
4
Details
4 to 20 mA dc input is standard. Inputs are across 250 Ω resistors
located inside housing.
Controllers will accept 1 to 5 V dc by removing the input resistor(s)
used with the current input.
Linearization of displayed value is provided, as follows:
Thermocouple
1 Pair
1
Temperature Range
Type J
–20 to +760°C (–4 to +1400°F)
Type K
–20 to +1380°C (–4 to +2500°F)
Type E
–130 to +540°C (–200 to +1000°F)
Input pulse rates, voltage levels, and field power are compatible with
Foxboro E83 Series Vortex Flowmeter, and with Foxboro 81 and 82
Series Turbine Flowmeter having a preamplifier input. Input
impedance is 250 Ω.
1 to 9999 Hz pulse up/pulse down pair of inputs driven by external
contact closure or voltage pulse. Contact closure/open times and
pulse voltage level are compatible with older stepping motor devices.
Platinum, per IEC 100 or SAMA* 100 (RC 21-4) temperature curves.
Linearization of displayed value is provided, as follows:
Range
Span
IEC 100
SAMA 100
–200 to +850°C
(–330 to +1560°F)
110 to 1000°C
(198 to 1800°F)
–200 to +600°C
(–330 to +1100°F)
110 to 800°C
(198 to 1440°F)
*Scientific Apparatus Makers Association.
Two Discrete Inputs
Two nonisolated contact or transistor switch inputs,
5 V dc nominal open circuit voltage, 1 mA maximum
current. For remote status changes such as A/M,
R/L, W/P, EXT ACK, and tracking functions.
Control Functions
Within this station are two independent controllers
with individual built-in options that can be
configured. This station is also user-configurable to
function as a single controller, cascade controllers,
or an auto selector.
For each controller, the standard algorithms are P, I,
PD, PI, PID, and EXACT control. The following
options may be configured: nonlinear extender, ratio,
measurement and set point tracking, output tracking,
remote/local set point, output multiplication or
summing, external reset, external limits for output,
and simple batch control.
Output Signals
TWO NONISOLATED ANALOG OUTPUTS
• Output One: 4 to 20 mA nominal into 500 Ω
maximum; isolation provided as an option.
• Output Two: 4 to 20 mA nominal into 500 Ω
maximum, or 1 to 5 V dc nominal into 2 kΩ
minimum, jumper selectable. Can be assigned by
user for control, measurement, set point, or
conditioned input signals.
TWO DISCRETE OUTPUTS
Two nonisolated open collector transistor (NPN)
switch outputs. For status indication of A/M, R/L,
W/P, and alarms, or can be configured as the
destination for any two of the Boolean Gate Inputs.
Contact ratings are 50 V dc maximum, 250 mA
maximum. Leakage current is 100 µA maximum.
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Other Control Functions
• Input bias, gain, and output bias available for
every input.
• Characterizers (two available, 8 segments each,
assignable).
• Boolean Gate Logic {DIRECT and NOT (single
input); OR, NOR, AND, NAND, XOR, and XNOR
(dual input); 18 function switches. Inputs
selectable from contact inputs, alarm output
states, status indicator outputs, EXACT state,
gate outputs, and three fixed states}.
• Signal Conditioning (square, square root,
characterizer).
• Split range outputs (configurable for both
4-20 mA outputs).
Alarms
Four dual-level alarms, each with a dead band and
one Boolean output are available. Each alarm is
configurable for Absolute, Deviation, Rate-ofChange, High/Low, High/High, Low/Low, Latching,
Nonlatching, or Permissive. Each alarm can be
configured to act on any one of a number of userselected points.
• Can be configured to indicate alarm status by a
combination of alphanumeric display, the bar
graphs, an alarm symbol, and the contact
outputs.
• The alarm dead band is adjustable between 0
and 100% of span.
Calculations
There are three calculation functions, designated
CALC 1, CALC 2, and CALC 3. The variables in
each calculation can be any combination of direct
inputs to the controller, configured constants, and
results of other calculation blocks. The available
operators are +, –, /, *, >, <, √_ and ten Boolean
gates. Open and close brackets are also available
for grouping variables.
Transmitter Power Supply
Nominal 28 V dc power supply with a 250 Ω limiting
resistor at each transmitter connection. Provides
field power for two 4 to 20 mA transmitters with a
maximum series resistance of 350 Ω in each current
loop, including the 250 Ω input resistor.
Execution Rate
Ten times per second.
Toggle Mode
Configuring the TOGGLE mode allows a user to
toggle (switch) between a menu level and the normal
front panel display with a single keystroke.
Dynamic Compensation
The result of CALC 3 may be passed through the
dynamic compensator function prior to distribution.
This block provides lead/lag, impulse, and dead time
functions, each with its individual follow switch.
Functionally, dead time precedes lead/lag and is the
input to the lead/lag function.
Dead time allows the input to CALC 3 to be delayed
by a configured time before making it available to the
output of CALC 3. The lead/lag function allows the
output to dynamically lead or lag the input by a
configured time. Both functions can be enabled or
by-passed selectively utilizing the follow switches.
The impulse can be positive, negative, or bipolar and
is part of the lead/lag function.
Dynamic Compensation Adjustment Limits
DEAD TIME
0 and 200 minutes
LEAD/LAG TIME
0 and 200 minutes
Memory
All configuration and operating parameters (not
status data) are stored in a nonvolatile RAM device
having a ten year data retention capability. Should a
power failure occur, essential control settings and
last operating conditions are saved indefinitely. No
batteries are used.
Input Filter
Second order Butterworth filter. Adjustable from
0 to 10 minutes in 0.01 minute intervals.
Signal Distribution
Over thirty signals are available for internal routing.
These are the conditioned and scaled inputs,
unconditioned inputs, control inputs and outputs,
and calculation results.
Power Consumption
15 VA maximum with 4 to 20 mA output
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PHYSICAL SPECIFICATIONS
Display
Vacuum fluorescent lamps in glass enclosure having
a glass frit seal and tin plated copper pin outs. Horn
symbol (for alarms) is Red, and bargraphs and
alphanumeric characters are Blue/Green.
Signal Connections (on rear panel)
762CNA
Two 16-position terminal blocks, with compression
terminals, for wire sizes up to 3.3 mm2 (12 AWG).
762CSA
Selectable by Model Code:
• 30-pin socket for use in 202S Shelf with
32-position terminal block and cord set. Terminal
block has compression terminals for wire sizes
up to 2.5 mm2 (14 AWG).
• 20-pin socket for retrofit use in all Foxboro
shelves using a 20-position terminal block and
cord set. Some controller features cannot be
used with this selection; refer to the Model Code
for details.
Power Connections (on rear panel)
762CNA
3-position terminal strip with 8-32 screw
connections.
762CSA
3-position power cord connector
Electronic Packaging
The electronic circuitry is mounted on two 1.6 mm
(0.62 in) thick, glass-based epoxy, wiring boards.
These electronic printed wiring assemblies (PWAs)
are interconnected using 20-pin connectors.
Mounting
762CNA
Direct panel mounting. Refer to
Dimensions-Nominal section.
762CSA
Mounts in a 202S Shelf or, for retrofit installations,
in EH, 101, or 102 Series Shelves.
Approximate Mass
2.8 kg (6.2 lb)
ELECTRICAL SAFETY SPECIFICATIONS
Testing Laboratory, Types of
Protection, and Area Classification
CSA for Ordinary Locations.
CSA for Class I, Division 2, Groups A, B, C,
and D.
FM for Ordinary Locations.
FM for Class I, Division 2, Groups A, B, C,
and D.
Application Conditions
Electrical
Safety Design
Code
—
Temperature Code T4.
CS–E/CG–A
CS–E/CN–A
—
Temperature Code T4.
CS–E/FG–A
CS–E/FN–A
NOTE
These controllers have been designed to meet the electrical safety descriptions listed in the table
above. For detailed information, or status of the testing laboratory approvals/certifications, contact
Foxboro.
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OPTIONAL FEATURES AND ACCESSORIES
Output Isolation
This option provides an isolated 4 to 20 mA nominal
signal (500 Ω load maximum) on output number 1.
Select Model Code Optional Suffix “–1”.
Platinum RTD Input
This option provides for accepting a platinum RTD
on input number 1. Calibrated per IEC 100 or
SAMA 100 temperature curves. Each curve is
linearized for digital readout over the ranges and
spans listed below:
IEC 100 (Direct or ∆T Measurement)
Range: –200 to +805°C (–330 to +1560°F)
Span: 110 to 1000°C (198 to 1800°F)
SAMA 100 (Direct or ∆T Measurement)
Range: –200 to +600°C (–330 to +1100°F)
Span: 110 to 800°C (198 to 1440°F)
Specify by selecting Model Code Optional
Suffix “–2”.
Factory Pre-Configuration
Unless otherwise specified, the controller is shipped
with a Factory Default configuration consisting of a
single measurement input, a local set point, PID
EXACT control with EXACT turned off, and scale
ranges of 0 to 100 percent.
Optional Factory Configurations are shown in
Table 2. Because the controller is so powerful and
virtually offers an unlimited number of solutions, only
some of the more common basic applications are
listed. Select the configuration that most closely
meets your needs. Any changes necessary to meet
your specific needs can easily be made in the field. It
usually will be necessary to change, at minimum, the
loop tag, the scale ranges, and the PID controller
turning parameters to suit process requirements.
Optional factory pre-configuration is offered without
additional charge. To order, refer to Table 2 and
specify the Auxiliary Specification (AS) for the
configuration that most nearly meets your needs.
The AS will be displayed in the loop tag to assist in
initial field identification.
Configuration Copy Accessory
All of the operating configuration is stored in a
NOVRAM. The copy accessory permits the entire
contents of the memory module to be quickly
copied to another NOVRAM, either a spare or one
from another controller. Specify Part Number
L0122TU for the copy accessory, and Part Number
K0141LN for a spare NOVRAM.
Surge Suppressor
A surge suppressor is optionally available for use
with serial communication input when external wiring
is located near transient producing sources such as
meters, solenoids, high voltages, etc. Specify
Auxiliary Specification (AS) SURSUP.
Replacement Shelf Signal Connector Assembly
This assembly is used for installing shelf-mounted
controllers with 30-pin signal connector into existing
102, 202, and EH Series Shelves. The assembly
includes plug, cable, and terminal block. Specify
Part Number K0143CG for 4 to 20 mA inputs and
outputs; or Part Number K0143EF for 10 to 50 mA
inputs.
When ordering this accessory, a replacement power
cord is also required (see Replacement Power Cord
section). Three types are available. Specify Part
Number listed in the following table.
Approximate
Part
Power Cord Type
Length
Number
Plug Type
(Plug at each end)
Long Extension Type
(Plug on one end)
Short Extension Type
(Plug on one end)
1.2 m
(4 ft)
5.6 m
(18.5 ft)
1.2 m
(4 ft)
N0139CA
N0139CB
N0139TZ
Guide for EH Shelves
A guide must be added between instruments when
installing 762CSA Controllers in EH Shelves.
Specify Part Number K0143CF.
PSS 2C-1A1 D
Page 11
Table 2. Factory Pre-Configuration Options
Description
AS(a)
Reference
Single Loop Controller
with Hi/Lo Measurement Alarm
with one Totalizer
with Hi/Lo Alarm and Totalizer
with Split Range Outputs
with 3-Variable Indicator Station
with Auto/Manual Transfer Station
Dual Loop Controller
with Hi/Low Measurement Alarms
with two Totalizers
with Alarms and Totalizers
3-Variable Indicator Station
with three Hi/Lo Alarms
with two Totalizers
with Alarms and Totalizers
with second 3-Variable Indicator Station
with second 3-Variable Indicator Station, Hi/Low Alarms and Totalizers
with Auto/Manual Transfer Station
Auto/Manual Transfer Station
with Hi/Low Alarm
with Totalizer
with Alarm and Totalizer
with second Auto/Manual Transfer Station
with second Auto/Manual Transfer Station, Hi/Low Alarms and Totalizers
with Split Range Outputs
Single Loop Flow Ratio Controller, 0 to 2 Ratio Range, Square Root Inputs
with Hi/Low Alarm
with one Totalizer
with Hi/Low Alarm and Totalizer
with Split Range Outputs
with 3-Variable Indicator Station
with Auto/Manual Transfer Station
Cascade Controller
with Hi/Low Primary Alarm
with one Totalizer
with Hi/Low Alarm and Totalizer
Auto Selector Controller, Low Select
with Hi/Low Alarms
with Totalizer
with Alarms and Totalizer
with High Select
Single Loop Controller with Pulse- or Contact-driven Set Point
Single Loop Controller with Output Freeze from External Contact Input 1
Single Loop Controller with Output Switching to a Preset Value from External Contact input 1
SINGL C
SINGL C1
SINGL C2
SINGL C3
SINGL C4
SINGL C5
SINGL C6
DUAL C
DUAL C1
DUAL C2
DUAL C3
IND S
IND S1
IND S2
IND S3
IND S4
IND S5
IND S6
A/M S
A/M S1
A/M S2
A/M S3
A/M S4
A/M S5
A/M S6
RATIO C
RATIO C1
RATIO C2
RATIO C3
RATIO C4
RATIO C5
RATIO C6
CASCDE C
CASCDE C1
CASCDE C2
CASCDE C3
A SEL C
A SEL C1
A SEL C2
A SEL C3
A SEL C4
PULSE SP
FREEZE
PRESET
(a) Auxiliary
Specification
PSS 2C-1A1 D
Page 12
MODEL CODES
SINGLE STATION MICRO Controller, Housing-Mounted
Nominal Supply Voltage and Frequency
120 V ac, 50/60 Hz
220 V ac, 50/60 Hz
240 V ac, 50/60 Hz
24 V dc
24 V ac, 50/60 Hz
100 V ac, 50/60 Hz
Housing and Signal Connections
32-Position Terminal Blocks on Rear of Housing
Controller Chassis without Housing
Optional Selections
Output Isolation, 4 to 20 mA (Output 1 only)
Platinum RTD Input(a) (Input 1 only)
762CNA
–A
–B
–C
–D
–E
–J
T
W
–1
–2
Example: 762CNA-AT-1
(a) Minimum span with platinum RTD input is 110°C (198°F).
SINGLE STATION MICRO Controller, Shelf-Mounted
Signal Connector
20-Pin Signal Connector, Quick Disconnect(a)
30-Pin Signal Connector, Quick Disconnect
Nominal Supply Voltage and Frequency
120 V ac, 50/60 Hz
220 V ac, 50/60 Hz
240 V ac, 50/60 Hz
24 V dc
24 V ac, 50/60 Hz
100 V ac, 50/60 Hz
Optional Selections
Output Isolation, 4 to 20 mA (Output 1 only)
Platinum RTD Input(b) (Input 1 only)
762CSA
–2
–3
A
B
C
D
E
J
–1
–2
Example: 762CSA-3E-12
(a) The following controller features cannot be accessed when the 20-pin signal connector is used: Analog Input 3, frequency
inputs, pulse inputs, RTD input option, 28 V dc field power to one transmitter (power can be supplied to one transmitter only).
(b) Minimum span with platinum RTD input is 110°C (198°F).
PSS 2C-1A1 D
Page 13
DIMENSIONS-NOMINAL
762CNA Controller - Housing-Mounted
mm
in
FOR PANEL CUTOUT DIMENSIONS, SEE NEXT PAGE.
FOR DIVISION 2 INSTRUMENTS, SEE BOTTOM OF PAGE.
MOUNTING PANEL 3 TO 22 mm
(0.12 TO 0.90 in) THICK
FRONT PANEL
MOUNTING
BRACKET
POWER TERMINALS
(24, 100, 120, 220,
240 V ac, OR 24 V dc,
AS SPECIFIED)
HOUSING
TWO 16-POSITION
TERMINAL STRIPS
TERMINALS
COVER
FIC 1002A
150.5 GPM
P
A
W/P
R/L
A/M
SEL
TAG
ACK
72
2.8
10.2
0.4
6.3
0.25
32
1.3
8.0
0.32
305
12.0
315
12.4
32
16
17
1
137
5.4
165
6.5
144
5.7
L
25
1.0
6.7 DIA.
0.26 DIA.
TERMINALS COVER
FOR DIVISION 2
INSTRUMENTS
AGENCY
LABEL
64
2.5
50
1.97
66
2.6
PSS 2C-1A1 D
Page 14
DIMENSIONS-NOMINAL (Cont.)
762CNA Controller - Housing-Mounted (Cont.)
mm
in
PANEL CUTOUT DIMENSIONS
(N X 72.0) - 40 = WIDTH (mm); TOLERANCE = +1.5, -0
(N X 2.84) - 0.16 = WIDTH (in); TOLERANCE = +0.06, -0
68.0 TO 69.5
2.68 TO 2.74
138.0 TO 139.0
5.43 TO 5.47
SINGLE*
CUTOUT
CL
CL
OF
CONTROLLER
CUTOUT FOR MULTIPLE CONTROLLERS*
3.0 TO 3.3
7.6 TO 7.9
0.12 TO 0.13
0.30 TO 0.31
* IF PANEL THICKNESS IS GREATER THAN
13 mm (0.5 in), A CLEARANCE SLOT FOR
LATCH ON BOTTOM OF CONTROLLER IS REQUIRED.
FRONT
SURFACE
OF PANEL
13
MAXIMUM
0.5
PANEL
THICKNESS
* IF PANEL HAS MORE THAN ONE CUTOUT, ALLOW 45 mm (1.78 in) VERTICAL DISTANCE BETWEEN
CUTOUTS AS SHOWN BELOW. THIS PROVIDES 36 mm (1.4 in) SPACING BETWEEN CONTROLLERS.
UPPER
CUTOUT
LOWER
CUTOUT
45
MINIMUM
1.78
PSS 2C-1A1 D
Page 15
DIMENSIONS-NOMINAL (Cont.)
762CNA Controller - Shelf-Mounted
For dimensions of shelves used with 762CSA Controllers,
refer to the applicable Dimensional Print listed in the table below.
SHELF MODEL
EH
101
102
202S
DIMENSIONAL PRINT
DP 018-510
DP 017-441
DP 017-410
DP 202-100
ORDERING INSTRUCTIONS
1.
2.
3.
4.
5.
6.
Model Number
Electrical Classification
Optional Features
Accessories
Optional Factory Pre-Configuration
User Tag Data
PSS 2C-1A1 D
Page 16
PATENT NOTICE
This product and its components are protected by one or more
of the following U.S. Patents, and other patents pending:
4, 616, 332; 4, 658, 348; 4, 704, 676; RE 33267; and
corresponding foreign patents.
The Foxboro Company
33 Commercial Street
Foxboro, MA 02035-2099
United States of America
http://www.foxboro.com
Inside U.S.: 1-888-FOXBORO
(1-888-369-2676)
Outside U.S.: Contact your local
Foxboro representative.
Facsimile (508) 549-4492
Foxboro, SINGLE STATION MICRO, and EXACT are registered trademarks of The Foxboro Company.
Siebe is a registered trademark of Siebe, plc.
A Siebe Group Company
MB 010
Copyright 1994-1996 by The Foxboro Company
All rights reserved
Printed in U.S.A.
0696
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