Page 1
NRT SERIES
MODELS
NRT
NC2
NR2
Ratemeter/Totalizer for NAMUR Sensors
INSTALLATION & OPERATING INSTRUCTIONS
99946 09/27/04
Page 2
TABLE OF CONTENTS
SPECIFICATIONS ................................................................................................... 1
DECODING PART NUMBER ..................................................................................2
HOW TO MOUNT THE UNIT ..................................................................................3
WIRING ................................................................................................................... 4
UP/DOWN CONTROL AND QUADRATURE INPUTS ............................................ 4
WHAT CAN YOU VIEW ...........................................................................................6
OUTPUT JUMPER SELECTIONS .......................................................................... 6
MILLIVOLT INPUT OPTION JUMPER SELECTIONS ............................................6
OPERATING FRONT PANEL .................................................................................. 7
PROGRAMMING FLOW CHART ............................................................................ 7
PROGRAM CODES & DESCRIPTIONS ................................................................. 8
TERMINATIONS ......................................................................................................9
CALCULATING SCALE FACTORS .........................................................................10
PROGRAMMING PROCEDURE ............................................................................. 11
SETTING SCALING FACTORS ..............................................................................11
SETTING THE COUNTER ...................................................................................... 12
SETTING THE RATE .............................................................................................. 13
SETTING THE LOCK CODE & LOCKING THE UNIT .............................................14
SETTING THE RELAYS & PRESETS ..................................................................... 15
OUTPUT WIRING ...................................................................................................16
ANALOG OUTPUT OPTION ................................................................................... 17
RS232/RS422 SERIAL COMMUNICATIONS.......................................................... 18
TROUBLESHOOTING GUIDE ................................................................................ 21
Page 3
DESCRIPTION & SPECIFICATIONS
Application:
Any rate, total or blending application where 2 preset alarms
and scaling are required for a NAMUR sensor.
Description:
The NAMUR R/T (NRT) is a 6 digit totalizer / ratemeter with
two level, 5 digit preset alarm control of total or rate. Inputs A
& B have separate scaling K-factors. The totalizer can be programmed for “A” subtract “B”, “A” add “B” or A & B as separate
totalizers, with display and control of the “net” total and rate
of "A". The NAMUR R/T is also available in 2 other versions.
NC2: a two preset totalizer with scaling, NR2: a high/low alarm
ratemeter with scaling. If only one input is required, the unit will
display the total and rate from that one channel. The NAMUR
R/T can accept up to 10,000 pulses per second. It has a 5
digit oating decimal scale factor allowing total readout in true
engineering units and rate per second, minute or hour.
Input “A” simultaneously drives a ratemeter which can be programmed to display the basic frequency (rate per second) or
factored to show rate per minute or rate per hour. Simply push
the “VIEW” button to see either total or rate without losing a
count. Two separate 5 A relay contacts can be set to operate
at either rate or total presets in a latch or auto-recycle mode
with output timing from 0.1 to 99.9 seconds.
Two control outputs can be assigned to either the totalizer or
ratemeter and can automatically recycle at the preset total or
stay latched until reset.
Several units can communicate to a host computer on a single
RS232 or RS422 loop. Each unit can be assigned it’s own
I.D. number.
When two inputs are received (A & B), the unit can either add
or subtract the two inputs or display the two inputs as separate
totalizers.
Specications:
Display: 6 digit, 0.55" High LED
Input Power:
110 VAC ± 15% or 12 to 15 VDC
220 VAC ± 15% or 12 to 15 VDC
24VAC ± 15% or 12 to 15 VDC
Current: 250 mA DC max. or 6.5 VA AC
Output Power: (AC powered units only)
Terminal 7: +12 VDC @ 50 mA, unregulated -10 + 50%
Terminal 10: +8VDC @ 50mA
Temperature:
Operating:
+32°F (0°C) to +130 F (+54°C)
Storage:
-40 F (-40°C) to +200°F (93°C)
Humidity: 0-90% Noncondensing
Memory: EEPROM stores data for 10 years if power is lost.
Inputs:
NAMUR Input:
Logic 0 < 1 mA; Logic 1 > 3 mA
Input Resistance 1000 ohms (typ.)
4-30VDC Input:
Logic 0 open or < 1V, Logic 1 > 4V
Input Resistance 10K ohms (typ.)
3N: NAMUR input on Input A
4-30 VDC input on Input B
3NB: NAMUR input on Input A and Input B
5N: NAMUR input on Input A
4-30 V Direction Control input on Input B.
5NB: NAMUR input on Input A and Input B
Direction Control input on Input B
9NB: Quadrature, accepts NAMUR inputs on Input A and
Input B with 90° phase shift for direction detection
Approvals: CSA File# LR91109-7, CE Compliant
Reset:
Front Panel:
Resets displayed value and control output
Remote:
4-30 VDC negative edge resets Totalizer "A"
and control output
Control Outputs:
Relays:
2 each N.O. Relay; 5 Amps 120/240 VAC or 28 VDC.
(N.C. relay contacts available with solder jumpers.)
Analog Output:
An optional 4-20mA (0-20mA) output is available for
the NAMUR R/T series. The output can be programmed
to track rate or total. This feature is available by
adding sufx A to the part number. Connections are
via a 2 terminal pluggable screw connector.
Programming is accomplished by using the front panel
in conjunction with rear dip switches.
Accuracy: ±.25% FS worst case.
Compliance Voltage: 3 to 30 VDC non inductive.
Scaling Factor (K-Factor): In the standard unit, a user programmable K-Factor is used to convert the input pulses to
engineering units. The 5 digit K-Factor dividers, with decimal
keyed into any position, allow easy direct entry of any K-Factor from 0.0001 to 99999. Separate factors may be entered
for the 2 separate input channels.
Presets: Two control outputs are provided. To set relay
values, press “menu” button until “Relay” appears on the
display, the A and B outputs can be assigned to the ratemeter
(high/low), one preset for rate and one for total, or two presets
on the A and B totalizers. A 5 digit value can be entered for
both presets and the decimal point location is the same as
the counter. The outputs can be set to energize from 0.1
to 99.9 seconds or latch (0.0). If a value other than 0.0 is
entered, the totalizers will auto reset at the preset . In the AB or A+B versions, the relays will be assigned to either net
total or A rate.
Lockout: Unauthorized front panel changes can be prevented by entering a user selected 5 digit code in the “LOC”
mode. The front panel can be completely locked out or the
presets can remain accessible.
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Page 4
SPECIFICATIONS
(continued)
DECODING PART NUMBER
Ratemeter: Accuracy: 0.01% FS (±1 display digit).
The rate display updates once per second. The rate meter
can be programmed to accept almost any number of pulses
per unit of measurement, sample from 2 to 24 seconds maxi-
mum, and auto-range up to 5 digits of signicant information.
In the “RPS” mode, the ratemeter displays in units per second, and in the “scale” mode, units per hour or per minute.
The unit will display the rate of the A Input only.
Totalizer: The two 6-digit totalizers can count at 10 kHz max.
Each can have a 5-digit dividing scale factor. The totalizer
advances on the positive edge of each pulse. Count up or
down modes available, as are quadrature inputs from en-
coders for position or ow measurement. The unit can be
programmed to view the net value of "A+B" or "A-B", or A and
B as separate totalizers.
RS232/RS422 with KEP Protocol:
If the serial interface option is supplied, multiple units can be
linked together. (The terminal addressing the unit must be
capable of driving all loads in the loop.) Unit status and new
set points can be communicated by serial communication.
Mode changes, however, must always be made on the front
panel.
Data is received and transmitted over standard EIA RS232 or
RS422 levels. Unit number, baud rate and parity are entered
in the “Program Setting” set up mode and remain in memory
even if power is off.
RS232/RS422/RS485 with Modbus RTU Protocol:
The serial port can be used for serial printing or also for data
acquisition. The unit can assign addresses up to 247 units
(The terminal addressing the unit must be capable of driving
all loads in the loop.) The unit can communicate with a master
device through a Modbus-RTU protocol. The data given for
each parameter is in IEEE oat format comprising of 2 words.
The unit can be connected in a network.
Device ID: 01-247
Baud Rates: 300, 600, 1200, 2400, 4800, 9600
Parity: None, Odd, Even
Protocol: Modbus RTU (Half Duplex)
Ordering Information
Example: NRT A 3 1
Series:
NRT= 6 digits, ratemeter/totalizer
with presets and scaling.
NC2= 6 digits, totalizer only with
presets and scaling.
NR2= 5 digits, rate only with
presets and scaling.
Operating Voltage:
A= 110 VAC ± 15% or 12 to 15 VDC
B= 220 VAC ± 15% or 12 to 15 VDC
C= 24 VAC ± 15% or 12 to 15 VDC
Count Inputs:
3N = NAMUR input on Input A, 4-30 VDC input on Input B.
3NB = NAMUR input on Input A and Input B
5N = NAMUR input on Input A,
4-30 V Direction Control input on Input B.
5NB = NAMUR input on Input A and Input B
Direction Control input on Input B
9NB = Quadrature, accepts NAMUR inputs on Input A and Input
B
with 90° phase shift for direction detection.
Options
1= RS232 Communications
2= RS422 Communications
3= Modbus RTU RS232
4= Modbus RTU RS422/RS485
A= Analog Output (4-20/0-20 mA)
NOTE: RS232/RS422/RS485 & Analog Output options can not be
combined
Accessories
Separate keyboard panel - order #34242
NEMA4 wall mount enclosure available, see NEMAtrol
Explosion proof enclosure available, see XHV
Serial printer available, see P1000, P295
Ethernet Port Server available, see IEPS
RS-422/485 to RS-232 Communication Adaptor available, see CA285
Modbus DDE/OPC Server available, see KEPserver
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Page 5
HOW TO MOUNT THE UNIT
3.622
(92)
1.772
(45)
4.437
(112.7)
2.625
(66.68)
0.587
(14.91)
4.245
(107.8)
BEZEL
GASKET
CUSTOMER PANEL
Panel Thickness 0.062" (1.5)
to 0.187" (4.7) max.
3.925
(99.7)
The unit is designed to be mounted with a gasket providing a water tight seal. Two mounting brackets are provided to secure
the unit to the panel. A panel less than .1" may distort if the clamps are screwed too tightly.
Slide the body of the unit through the rubber gasket. Insert the unit into the panel. As shown in "FIG. A", slide the brackets
up the groove to press against the back of the panel. Insert screws into rear of brackets and tighten them evenly and alternately. Do not over tighten! A normal level of torque is required. Maximum torque should be 3" pounds.
This product is designed to be panel mounted and is NEMA 4 rated if proper mounting procedures are followed and the
required and supplied hardware is correctly used.
If the panel in which the unit is mounted is less than .125 of an inch thick, the possibility exists that there will be some exing. Should this exing occur, the resulting deformation of the panel could cause a loss of the water tight seal. In case this
should occur, the use of silicone or other sealant would be recommended.
This product is designed to the NEMA 4 rated. However, the fact that we are unable to control either the location in which
the device is installed or the actual installation itself requires that the company's liability shall extend only to the repair or
replacement of a defective product.
We are prepared to offer additional assistance in those special situations where normal mounting methods do not seem to satisfy the customers needs. This assistance may be obtained by calling the factory and asking for Application Engineering.
FIG. A
DIMENSIONS
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Page 6
WIRING
The rear terminal contains 12 screw terminals for connecting #14 to #28 gauge wire.
The unit is controlled by a microprocessor and, therefore, an electrically "noisy" environment could cause operating problems.
The input power line should not be common to power lines for motors, pumps, contactors, etc.
The unit is designed to be immune from line or RF voltage interference. In some environments voltage spikes of over 100
volts, even 1000 volts, can occur. When common to a power line driving motors voltage uctuations can be extreme and
rapid. Lines driving DC or AC solenoids, relays, or actuators can also cause problems.
Four sources of noise can occur:
1) AC power line noise - If the unit cannot be connected to a clean power source, an inductive load suppressing device
(MOV as GE # V130LA1 or Resistor Capacitor as Paktron # .2 uf/220 ohm @ 400V) can be installed. Although locating
the suppressor across the AC supply at the unit should help, best results are obtained by connecting the suppressor
across the leads of the "load" at the device causing the spike.
2) Input line noise -The noise is carried on the input and D.C. ground lines. Make sure the input wires are never run into
the unit in a bundle with power input lines. Also, keep these input lines isolated from inductive lines from devices
drawing heavy loads. If there is a possibility of electrical noise, we recommend using shielded cable, with the shield
being hooked to the D.C. ground terminal on the instrument, and to "earth" at one point in the circuit, preferably at the
D.C. ground terminal of the unit.
3) Output lines - The unit has two relay outputs. When these outputs are used to run external relays or solenoids, spikes
can be generated upon activation. This noise can spread through the instrument causing operating problems. If the
source is a D.C. operated device, a general purpose diode (IN4004) placed across the solenoid prevents electrical
noise spikes. Connect the cathode (banded side) to the more positive side of the coil. If the source is an A.C. operated
device, use a MOV or Resistor Capacitor across the coil.
4) 12 VDC output supply - Noise can be generated on the 12 VDC output supply if it is used to drive inductive loads or if
the current draw exceeds 50 mA. Insure that all inductive loads have a diode (such as IN4004) across the coil and that
the current does not exceed 50 mA.
UP/DOWN CONTROL AND QUADRATURE INPUTS
QUADRATURE INPUT:
When programming the counter section for quadrature input, you must set the unit for A net B and A sub B (see step 2 in
programming section). This insures proper operation. The rate can only be viewed in one direction. If the unit is a ratemeter
only (NR2), connect only one of the quadrature channels to Input A (pin 5).
UP/DOWN CONTROL:
When using the up/down control option, Input A (pin 5) is the count input and Input B (pin 6) is the up/down control (direction)
input. The counter must be set for A net B and A sub B (see step 2 in programming section).
When the direction input is high (4-30VDC (Input typr 5N) or >3mA (input type 5NB)) the count inputs will count up, when the
direction input is low (open, <1VDC (input type 5N) or <1mA (input type 5NB)) the count inputs will count down. The direction input must precede the count input by 1 msec when the unit is set for low CPS and 1 usec when set for high CPS.
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Page 7
CONNECTING AC / DC POWER
1- COMMON
2- N.O.(N.C./NPN)
3- COMMON
4- N.O.(N.C./NPN)
5- A INPUT (NAMUR)
6- B INPUT
7- +12VDC OUT/+DC IN (unregulated)
8- -DC (GROUND)
9- RESET INPUT
10- +8VDC @ 50mA
11- A.C. INPUT
12- A.C. INPUT
RELAYS
A
B
13- V+
14- I SINK
ANALOG
OUTPUT
ON
CAL.
0-20mA
COUNT
SET
OFF
RUN
4-20mA
RATE
RUN
1 2 3 4
ON
SWITCH
NAMUR
Sensor
(–)
(+)
115
VAC
Fuse
NOTE: Connect power only after other connections are nished. Do not touch the live AC power terminals! The unit has
been designed with an isolated AC input. Thus, polarity is not a concern for the AC input. The chassis is plastic, therefore
earth ground is not used. For D.C. operation, connect + 12V to pin 7 and - D.C. to pin 8.
CONNECTING NAMUR SENSOR INPUTS
A NAMUR sensor is an electronic switch activated by a piece of metal moved close to the activation point. The sensor is a
2-wire proximity switch between two currents of <1 mA and > 3 mA. The switch is "off" if current is <1 mA, and "on" if the
current is >3 mA.
TYPICAL HOOKUP
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Page 8
WHAT CAN YOU VIEW?
FUNCTION
"A" RELAY
N.C. OUTPUT
"B" RELAY
N.C. OUTPUT
"A" PRESET
TRANSISTOR (NPN)
"B" PRESET
TRANSISTOR (NPN)
"B" AS BATCH
COUNTER
"B" AS GRAND
TOTA L COUNTER
MODIFICATION
CUT JUMPER
AT "A" "B" TO "2"
CUT JUMPER
AT "D" "E" TO "4"
CUT JUMPER
AT "A" "C" TO "2"
CUT JUMPER
AT "D" "F" TO "4"
SELECT JUMPER
"A SEP B" "H" TO "G"
SELECT CONNECT
"A SEP B" PULSES TO
"A" & "B"
BOTTOM VIEW AT TERMINAL
DE
G
H
20192
12 11 10 9 8 7 6 5 4 3 2 1
L
4
AB
2
FC
1) "A sub B" - If you have selected the "A sub B" mode, pressing "view" shows:
A) The net Total result of subtracting input B from input A. Pulses on input B will subtract (count down). Pulses on
input A will add (count up) if "reset to 0" is selected, if "set to preset" is selected, input A will subtract (count
down).
B) The rate of input A.
2) "A add B" - If you have selected "A add B" mode, pressing "view" shows:
A) The net Total result of adding "A" and "B" inputs. Pulses on input B will add (count up). Pulses on input A will add
(count up) if "reset to 0" is selected, if "set to preset" is selected input A will subtract (count down).
B) The rate of input A.
3) "A sep B" - If you have selected " A sep B" mode, pressing "view" shows:
A) The total counts of input A. If "reset to 0" is selected A counts up, if "set to preset" is selected A will count down.
B) The rate of input A.
C)* The total counts of input B. B will always count up.
NOTE: In "A sep B" mode, B can be used in 3 ways:
1) As a separate totalizing counter
2)** As a Batch Total Counter for input A
3)** As a Grand Total Counter for input A
NOTE:
* All decimal points are inverted when "B total" is being displayed.
** See below on how to modify for Batch Count and "B" as a Grand Total Counter.
OUTPUT JUMPER SELECTIONS
*
*
* The unit must be removed from the case to access jumpers C & F, all
other jumpers can be accessed by removing the plastic extender.
NOTE: All three pads at jumpers 2 and 4 are connected.
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Page 9
PROGRAMMING FLOWCHART
65
4
3
21
LOCK PRE A PRE B VIEW PRGM
ENTER
Press to "reset"
in operating
mode.Press to
"enter" in
programming
mode.
Press to enter
lock code for
panel lock.
Press to
view or
change
preset A.
Press to
view or
change
preset B.
Press to alternately
view A rate & net
total or A rate,
A total & B total.
Press to cycle
through PROGRAM
choices. Press to
toggle between
choices in program
mode.
OPERATING THE FRONT PANEL
RST
PRGM
FACToR
RUN MODE
DP F A
#####
DP F B
#####
ENTER
ENTER
ENTER
ENTER
ENTER
PRGM
Hi
CPS
Lo
CPS
PRGM
RUN MODE
ENTER
RATE METER
(MR2) ONLY
CouNT
ENTER
RST
0
SET
PR
PRGM
ENTER
DPLoC
ENTER
A
NET
B
A
SEP
B
PRGM
ENTER
ENTER
A
ADD
B
A
SuB
B
PRGM
Hi
CPS
Lo
CPS
PRGM
ENTER
RUN MODE
ENTER
RATE
ENTER
SCALE RPS
PRGM
Z3600
Z60
PRGM
ENTER
ENTER
ENTER
RUN MODE
NoR ##
ENTER
FiguR#
ENTER
DLY #
ENTER
LoC
ENTER
LC
PRg
LC
ALL
PRGM
ENTER
CoDE
#####
RUN MODE
ENTER
RELAY
ENTER
A
ToT
A
RATE
PRGM
A ##.#
ENTER
ENTER ENTER
B
ToT
B
RATE
PRGM
B ##.#
ENTER
ENTER ENTER
RUN MODE
PRGM PRGM
PRGM
NOTE: Several programming selections will not appear with NC2 and NR2 units.
Start Here
Press this key to step through menu choices.
Press this key to enter displayed value
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Page 10
The following is a list of abbreviations as they appear on the display and front panel of the unit.
ABBREVIATION DESCRIPTION
FACTOR SCALING FACTOR - For A and B Inputs. Each input has a separate 5 digit dividing scale factor.
DP F A DECIMAL POINT FOR FACTOR A - Enter location of decimal point for scaling Factor A by pressing the
button under the digit where the decimal is desired.
DP F B DECIMAL POINT FOR FACTOR B - Enter location of decimal point for scaling Factor B by pressing the
button under the digit where the decimal is desired.
COUNT PORTION OF MENU FOR SETTING COUNTER VARIABLES
RST 0 RESET TO 0 - Counter will reset to 0. Input A will count up from 0. Input B will subtract (count down) in A
Sub B mode. Input B will add (count up) in A Add B mode.
SET PR SET TO PRESET - Counter will reset to preset A. Input A will count down from preset A. Input B will count
up (add) in "A add B" mode and input B will count down (subtract) in "A sub B" mode.
DP LOC DECIMAL POINT LOCATION - Enter desired location of decimal by pushing the button under the digit where
the decimal is desired. Changing the decimal will change the decimal location in the A & B counters as well
as the rate display.
A NET B NET RESULT OF ADDING OR SUBTRACTING A & B INPUTS
A SEP B A & B INPUTS ARE SEPARATE - A & B are not added or subtracted.
A SUB B A SUBTRACT B - The number of scaled pulses from Input B are subtracted from the number of scaled pulses
from Input A. (-99999 TO 999999)
A ADD B A ADD B - The number of scaled pulses from the A Input are added to the number of scaled pulses from the
B Input.
HI CPS HIGH COUNTS PER SECOND - This sets the unit for high count speeds (0-9.99KHz)
LO CPS LOW COUNTS PER SECOND – This sets the unit for contact debounce ltering (0-40Hz)
RATE PORTION OF MENU FOR SETTING RATE VARIABLES
RPS RATE PER SECOND - The display will read in rate per second.
SCALE SCALING - Allows unit to display rate per minute or rate per hour.
Z 60 DIVIDE K FACTOR BY 60 - This sets the unit for rate per minute; equal to 60 times rate per second.
Z 3600 DIVIDE K FACTOR BY 3600 - This sets the unit for rate per hour; equal to 3600 times rate per second.
NOR## NORMALIZING FACTOR - Normalizes (averages) the data being received. Higher settings provide more
normalizing (averaging) for a more stable display. Derived from the equation:
(Old Data x "NOR" + New Data)
("NOR" + 1)
FIGUR ## SIGNIFICANT FIGURE - This sets the amount (1-5) of meaningful gures the unit will display. (RATE DIS
PLAY ONLY). FOR EXAMPLE: If "2" is set as the gure, a rate of 273.45 will be displayed as 270.
DLY## DELAY FACTOR - The amount of time (02 to 24 sec.) the unit will "look" for valid data, before the display
defaults to zero. (RATE DISPLAY ONLY)
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Page 11
LOC LOCK - This portion of the menu allows you to:
1 2 3 4
REAR VIEW
1 2 3 4 5 6 7 8 9 10 11 12
13 14
Analog Out Setup SwitchesSerial Port
ON
1- COMMON
2- N.O.(N.C./NPN)
3- COMMON
4- N.O.(N.C./NPN)
5- A INPUT (NAMUR)
6- B INPUT
7- +12VDC OUT/+DC IN (unregulated)
8- -DC (GROUND)
9- RESET INPUT
10- +8VDC @ 50mA
11- A.C. INPUT
12- A.C. INPUT
RELAYS
A
B
13- V+
14- I SINK
ANALOG
OUTPUT
ON
CAL.
0-20mA
COUNT
SET
OFF
RUN
4-20mA
RATE
RUN
1 2 3 4
ON
SWITCH
1) lock the program (presets are still accessible)
2) lock all (presets and program are locked).
LC PRG LOCK PROGRAM - This will lock the program and allow the presets to be changed when the unit is in the
lock mode.
LC ALL LOCK ALL - This will lock the program and the presets when the unit is in the locked mode. The presets can
be viewed, but not changed.
CODE LOCK CODE - This message (code) will ash on display for approximately 3 seconds. It will be followed by a
5 digit number (xxxxx). The number you enter here will be the code to lock and unlock the unit.
RELAY RELAY - This portion of the menu allows you to set your relay operation variables.
A TOT RELAY A FOR TOTALIZER - When this is selected relay A will activate when the net total has reached
Preset A ("A NET B" Mode ). Relay A will activate when the total of input A reaches preset A ("A SEP B"
Mode).
A RATE RELAY A FOR RATE - When this is selected relay A will activate when the Rate of input A equals or exceeds
preset A when in "A NET B" or "A SEP B" mode. The relay will drop out when the rate of A falls below preset
A.
A##.# RELAY A DURATION - This message will appear when "A TOT" is selected. It is the duration which the
relay will remain energized (00.1 to 99.9 sec). If 00.0 is selected, the relay will latch until reset. When the
duration is not at 00.0, the unit will autorecycle.
B TOT RELAY B FOR TOTALIZER - When this is selected relay B will activate when the net total has reached preset
B ("A NET B" Mode). Relay B will activate when the total of input B has reached preset B ("A SEP B" Mode).
B RATE RELAY B FOR RATE - When this is selected relay B will activate when the rate of input A equals or exceeds
preset B when in "A NET B" or "A SEP B" mode. The relay will drop out when the rate of A falls below preset
B.
B##.# RELAY B DURATION - Follow same procedure as A ##.#.
TERMINATIONS
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Page 12
CALCULATING SCALE FACTORS
There are two separate dividing scale factors, one for input "A" and one for input "B". The factor to enter is the number of
pulses per the desired unit of measurement. The factor ranges from 0.0001 to 99999. The factor is the same for rate and
count on input "A". Because the "units per second", "minute", or "hour" are eld programmable from the keypad, scale factor
calculations for the ratemeter are easy. Here are some examples:
SCALING FACTOR EXAMPLES:
BATCHING: You want to count the number of batches (10 boxes each) being loaded onto a pallet.
Solution - Dial in a scale factor of 10.
UNIT COUNTING: You pick up a notch on a paper roll (1 pulse per shaft revolution). Each revolution equals 3 feet. To
nd the number of pulses per foot, simply divide "1 pulse" by "3 feet" (1÷ 3 = .3333).
Solution - One foot equals 0.3333 pulses, enter this as the scale factor and the display will read in feet.
RATE: The shaft of a motor has a ywheel with 10 spokes. The KEP DO series prox switch is mounted to
sense 10 pulses per revolution. RPM of the shaft is the desired readout.
Solution: Enter a Factor of 10 and for every 10 pulses, "1" will appear on the display. Set rate per
second, minute or hour as desired.
A conveyor carrying bottles must be controlled for bottle speed. For each revolution of the front roller, three bottles
travel by. Thus, one revolution equals 3 bottles. A wheel with seven spokes is mounted on the roller. The user
can't sense bottles because they are traveling through a washer, so a sensor is placed at the roller, sensing seven
pulse per revolution of the shaft, which equals 3 bottles per revolution.
To calculate the scale factor (7 ppr ÷ 3 bottles) = 2.3333 scale divider. Set rate per second, minute or hour as
desired.
A ow meter is generating 52.6 pulses per gallon. The desired readout is in liters. Since there are 3.785 liters per
gallon, divide 52.6 by 3.785 to nd the number of pulses per liter (52.6 ÷ 3.785 = 13.897).
Enter 13.789 as the scale factor so the display will read in liters.
An aluminum sheeting plant has a cut to length application to customer specication. A ten pulse per revolution
encoder with a 12" wheel is used to sense. The travel of aluminum sheets is in inches. Thus, after 10 pulses, you
want 12 to appear on the display. Thus, 10 ÷ 12 = .8333. Enter .8333 as your scale factor.
10
Page 13
PROGRAMMING
STEP
1
SETTING
SCALING
FACTORS
THIS SECTION
WILL ONLY APPEAR IN THE
RATE METER
ONLY (NR2)
VERSION
PRESS
DISPLAY
factor
dp f a
#####
hi cps
or
lo cps
REMARKS
This section of the menu is used to set
up the scaling factors for inputs A & B.
This sets the decimal for factor A. Press
the arrow key under the digit where the
decimal is desired. To clear the decimal,
press the arrow key furthest to the right
(PRGM) .
This is the scaling factor for input A.
To change, press the arrow key under
the digit(s) to change. Press ENTER to
enter the displayed value.
This section will only appear in the RATE
only version. Press the PRGM key to
choose HIGH CPS (0-9.99KHz) or LOW
CPS (0-40Hz). Press the ENTER key
to enter the displayed choice.
dp f b
#####
This sets the decimal for factor B. Press
the arrow key under the digit where the
decimal is desired. To clear the decimal,
press the arrow key furthest to the right
(PRGM) .
This is the scaling factor for input B.
To change, press the arrow key under
the digit(s) to change. Press ENTER to
enter the displayed value.
11
Page 14
PRESS DISPLAY REMARKS
factor
STEP
2
SETTING
THE
COUNTER
count
rst 0
or
set pr
dp loc
a net b
or
a sep b
This section of the menu sets up the
counter information.
Press the PRGM key to choose RST 0
(reset to 0, count up) or SET PR (set to
preset, count down), press the ENTER
key to enter the displayed choice.
This sets the decimal location for the A &
B counters. Press the arrow key under
the desired digit location. To clear the
decimal, press the arrow key furthest
to the right. Press the ENTER key to
enter the displayed location.
Press the program key to choose A
NET B (add or subtract A & B) or A
SEP B (view A & B as separate counters). Press the ENTER key to enter
the displayed choice.
a sub b
or
a add b
hi cps
or
lo cps
This section will only appear if A NET B
was selected. Choose A SUB B (A subtract B) or A ADD B. Press the ENTER
key to enter the displayed choice.
Press the PRGM key to choose HIGH
CPS (0-9.99KHz) or LOW CPS (040Hz). Press the ENTER key to enter
the displayed choice.
12
Page 15
STEP
3
REMARKSPRESS DISPLAY
factor
SETTING
THE RATE
count
rate
rps
or
scale
z 60
or
z 3600
nor ##
figur #
This section of the menu is used to set up
the rate information.
Press the PRGM key to choose RPS (rate
per second) or SCALE (RPM, RPH). Press
ENTER to enter displayed choice.
Press PRGM to choose ÷60 (RPM) or
÷3600 (RPH). Press ENTER to enter dis-
played choice.
This sets the normalizing (averaging) factor. Press the arrow keys under the desired
digits to change. Press ENTER to enter displayed value.
This sets the number of signicant gures
to be displayed. Press the arrow key under
the digit to change. Press ENTER to enter
displayed value.
dly #.#
This sets the delay time (2 to 24 sec.) that
the unit will "look" for valid input data before
the display falls to 0. Press the arrow key
under the digits to change. Press ENTER
to enter displayed value.
13
Page 16
PRESS
DISPLAY REMARKS
STEP
4
SETTING
LOCK
factor
count
rate
loc
LC PG
or
LC ALL
CoDE
Flashes
followed by:
#####
This section of the menu is used to set up the
lockout type and code.
LC PG = Locks program but presets and reset are accessible.
LC ALL= Locks entire keypad.
Press the PRGM button to toggle between
choices; Press ENTER to enter displayed
choice.
After CODE ashes the display will show the
existing lock code. To change the code press
the key under each digit to be changed. Press
ENTER to enter displayed value.
SETTING
THE
LOCK
STATUS
CoDE
Flashes
followed by:
0
LoC
or
uN LoC
Key in the lock code (see programming step
4) by pressing the keys under the digits to be
changed. Press the ENTER key to enter the
displayed code.
After the code is entered the unit will display
LOC (unit is locked) or UN LOC (unit is unlocked). This message will be displayed for
approximately 3 seconds before the unit returns to the run mode.
14
Page 17
DISPLAYPRESS
factor
REMARKS
STEP
5
SETTING
THE RE-
LAYS
count
rate
loc
relay
a tot
or
a rate
A ##.#
b tot
or
b rate
This section sets up the relay information.
Press the PRGM key to choose A TOT (A
assigned to total) or A RATE (A assigned to
rate). Press enter when the desired choice is
displayed.
This is the duration (.1 to 99.9 sec) that relay
A will remain energized. If 00.0 is selected,
the relay will latch until reset
Press the PRGM key to choose B TOT (B
assigned to total) or B RATE (B assigned to
rate). Press enter when the desired choice is
displayed.
SETTING
THE
PRESETS
b ##.#
PRE A
Followed by
last PRE A
entered
PRE B
Followed by
last PRE A
entered
This is the duration (.1 to 99.9 sec) that relay
B will remain energized. If 00.0 is selected,
the relay will latch until reset
PRE A = Preset A (Final Preset); The set point
at which output A will trigger. If the displayed
value is not the desired preset, press the key(s)
under the digit to be changed.
PRE B = Preset B (Prewarn); The set point
at which output B will trigger. If the displayed
value is not the desired preset, press the key(s)
under the digit to be changed.
15
Page 18
OUTPUT WIRING
1- COMMON
2- N.O.(N.C./NPN)
3- COMMON
4- N.O.(N.C./NPN)
5- A INPUT (NAMUR)
6- B INPUT
7- +12VDC OUT/+DC IN (unregulated)
8- -DC (GROUND)
9- RESET INPUT
10- +8VDC @ 50mA
11- A.C. INPUT
12- A.C. INPUT
RELAYS
A
B
13- V+
14- I SINK
ANALOG
OUTPUT
ON
CAL.
0-20mA
COUNT
SET
OFF
RUN
4-20mA
RATE
RUN
1 2 3 4
ON
SWITCH
NAMUR
Sensor
(–)
(+)
115
VAC
Fuse
115 VA C
SOLENOID VA L V E
MOV
recommended
115 VAC
1- COMMON
2- N.O.(N.C./NPN)
3- COMMON
4- N.O.(N.C./NPN)
5- A INPUT (NAMUR)
6- B INPUT
7- +12VDC OUT/+DC IN (unregulated)
8- -DC (GROUND)
9- RESET INPUT
10- +8VDC @ 50mA
11- A.C. INPUT
12- A.C. INPUT
RELAYS
A
B
13- V+
14- I SINK
ANALOG
OUTPUT
ON
CAL.
0-20mA
COUNT
SET
OFF
RUN
4-20mA
RATE
RUN
1 2 3 4
ON
SWITCH
NAMUR
Sensor
(–)
(+)
115
VAC
Fuse
115 VAC
1- COMMON
2- N.O.(N.C./NPN)
3- COMMON
4- N.O.(N.C./NPN)
5- A INPUT (NAMUR)
6- B INPUT
7- +12VDC OUT/+DC IN (unregulated)
8- -DC (GROUND)
9- RESET INPUT
10- +8VDC @ 50mA
11- A.C. INPUT
12- A.C. INPUT
RELAYS
A
B
13- V+
14- I SINK
ANALOG
OUTPUT
ON
CAL.
0-20mA
COUNT
SET
OFF
RUN
4-20mA
RATE
RUN
1 2 3 4
ON
SWITCH
NAMUR
Sensor
(–)
(+)
115
VAC
Fuse
STRIP CHART
RECORDER
-
+
The following diagrams detail the connection of the relay and analog output options. Each relay consist of a form A contact
(Normally Open). NPN transistor or Normally Closed contacts are available with solder jumpers (see Jumper Options).
SOLENOID
Use Relay A (pins 1 & 2) for output to a solenoid valve. When the count or rate (selectable) reaches Preset A,
Relay A will energize. When Relay A closes, current passes through the solenoid for activation. When operating AC
solenoids, we recommend the use of an MOV to reduce inductive kickback (use a diode for DC solenoids).
ANALOG OUTPUT
The analog output can be selected to output 4-20 mA or 0-20 mA and can be selected to track the rate or count.
Pin 13 supplies 12 to 18V to power the current loop. Pin 14 supplies the current sinking driver. When connecting
a strip chart recorder, make connections as follows:
ALARMS
The relays can be used to trigger alarms which warn the operator that the preset Total amount has been reached
or the rate has exceeded a set speed. The outputs are programmable to be assigned for rate or count. When
assigned to the count, the relays can have a user selectable on time (duration) or can be latched until reset.
16
Page 19
ANALOG OUTPUT OPTION
1 2 3 4
REAR VIEW
1 2 3 4 5 6 7 8 9 10 11 12
13 14
Analog Out Setup SwitchesSerial Port
ON
RELAY A COMMON
RELAY A N.O.
RELAY B COMMON
RELAY B N.O.
INPUT A
INPUT B
12 to 18V OUT/ +DC IN
-DC (GROUND)
RESET INPUT
NOT USED
110 / 220 VAC
110 / 220 VAC
12 to 18V OUT
ANALOG OUT (SINK)
GND
+12V
STRIP CHART
RECORDER
-
+
TURBINE FLOWMETER
PULSE OUTPUT
10
11
12
1
2
3
4
5
6
7
8
9
13
14
Description:
An optional 4-20mA (0-20mA) output is available. The output can
be programmed to track rate or total. This feature is available by
adding sufx A to the part number. Connections are via a 2 terminal
pluggable screw connector.
Connections: (see FIG. 1)
PIN13 supplies the 12 to 18 VDC to power the current loop.
PIN14 is the control sink driver
Accuracy:
50uA worst case
Compliance Voltage:
3 to 30 VDC non conductive
Setup:
The optional analog output feature uses 4 dip switches on the back
for setup. These switches are used as follows:
SW1 - View or change "set low" and/or "set high" values
SW2 - Select output for rate or total
SW3 - Select 4-20mA or 0-20mA
SW4 - Calibrate the unit.
After the regular parameters shown in the programming owchart
have been set, locate the 4 switches on the back of the unit. (see
FIG. 1)
SWITCH 4: Calibrate (normally off)
Switch 4 is used for calibration. Calibration is done at the factory
and should not be needed (see SWITCH 1 to enter high and low
values). If recalibration is desired, a calibrated 20mA ammeter with
1uA resolution is needed. Attach the "+" lead of the meter to pin 13
and the "-" lead to pin 14. Set switch 4 ON (up). The unit will output
approximately 20.000mA and a decimal will light in the third position.
Read the output using the ammeter. Press PRE A. If the display is
the same as the ammeter reading, press ENTER. If not, press buttons A through E to step to ammeter reading and ENTER. (Disregard
display which now shows the last count reading with decimal point
in third position) Return switch 4 to OFF (down) position.
RS232 & RS422 Operation:
When the unit is suppled with RS232 or RS422, the analog output
"low" and "high" settings can be accessed and changed through the
serial port. The codes are as follows:
AL Unit will display (transmit) analog out "low" value.
AL(S)XXXXX Unit will load analog out "low" with entered
number. (S) = space
AH Unit will display (transmit) analog out "high" value.
AH(S)XXXXX Unit will load analog out "high" with entered
number. (S) = space
FIG. 1
Switch Settings:
SWITCH 1: Enter Analog Low & High (normally off)
Switch 1 is used to load in the low (4mA or 0mA) and/or the high
(20mA) output settings. With power on, set switch 1 ON (up).
LOW SETTING is viewed or changed by pressing PRE A. If the
displayed value is correct, press ENTER. If not, press buttons A
through E to step to the desired value and press ENTER. (disregard
the display which will show the last count reading).
HIGH SETTING is viewed or changed by pressing PRE B. If the
displayed value is correct, press ENTER. If not, press buttons A
through E to step to desired value and press ENTER.
Return switch 1 to OFF (down) position, PRE A and PRE B buttons
now function to view or change relay trip values.
SWITCH 2: Select Count or Rate
SW2 OFF (down): Analog output follows rate
SW2 ON (up): Analog output follows count
SWITCH 3: Select 4-20mA or 0-20mA
SW3 OFF (down): Selects 4-20mA output range
SW3 ON (up): Selects 0-20mA output range
Typical Wiring:
17
Page 20
INTERFACE CARD RS 232/422 OPERATION
RS 232/422 SET-UP:
All serial communication mode changes must be done
through serial communications. Mode changes cannot be
done through the front panel. To initialize the unit, place a
jumper between pin 7(+12V )[bottom board] and pin 1(init)
[DB -9 connector] on initial power up. The unit defaults
to: 300 baud rate,"MARK" parity and device number 01. To
enter the program mode you must set your terminal for 300
baud rate and "MARK" parity. Next, type D1(s), (s)= space
bar. The unit will echo back "DEVICE #1:". Now type EP
(enter program) and a carriage return (enter). The unit will
echo back "PROGRAM SETTING". You are now in the programming mode.
SETUP PROCEDURE:
The following sections consist of the communications setup
options as they appear in the menu. (If you wish to exit the
program mode, at any time you can hit the "escape key" (Hex
Code: 1B) and the unit will save the changes made but not
effect the remaining data values.) When each section of the
setup menu is displayed, the current data will appear in the <
> signs. If you wish to change the data, type in the number
of the desired choice and press return (enter). If you wish to
keep the current data, simply press return.
DEVICE NUMBER:
Each unit in the hook-up must be assigned it's own device
number (1 to 99). Zero is reserved for a dedicated hook-up
to only one terminal, and it's transmit output line remains in
an "on" active state. The device number is entered in the
program mode. The unit will prompt you:
DEVICE# <XX>?
If XX is the desired device number press return (enter), if not
enter the desired number after the question mark and press
return (enter).
BAUD RATE:
The baud rate is the speed at which data is transmitted,
expressed in bits per second. Baud rates of 300, 600, 1200,
2400, 4800 or 9600 are available. When in the baud rate
section of the menu, the unit will list :
BAUD RATES:
1:300 2:600 3:1200
4:2400 5:4800 6:9600
then prompt you:
BAUD RATE <300>?
Press return (enter) if this is the desired baud rate or enter
the assigned number of one of the six possible baud rates.
If an invalid baud rate is entered the unit will prompt you to
choose another baud rate. This will occur until a valid baud
rate is entered or escape is pressed.
PARITY:
Parity is a bit of information that is inserted before the stop
bit and is used to help check if the transmission is correct.
When setting the parity you may select "ODD" (parity bit is
logic 0 if total number of logic 1's in the rst seven data bits
is odd), "EVEN" (parity bit is logic 0 if total number of logic
1's in the rst seven data bits is even), "MARK" (parity bit is
always logic 1 - High / Mark) or "SPACE" (parity bit is always
logic 0 - Low / Space). If a "MARK" parity is chosen, it will
appear that two stop bits are used. Use the "MARK" parity
with terminals using parity "OFF" or "NONE". These terminals
ignore the parity. The unit does not check the parity but does
transmit the parity chosen. When setting the parity, the unit
will print:
PARITIES:
MARK-0 SPACE-1 EVEN-2 ODD-3
Then the unit will prompt you:
PARITY<MARK>?
If this is the desired parity press return (enter), if it isn't enter
the number of the desired parity then press return (enter).
STROBE LIST:
The serial interface card is also equipped with a strobe line.
When the strobe line is triggered, a chosen set of data will
be transmitted to be displayed or printed. The selections for
the display list are entered in the program mode. Enter "1"
to add selections to the list and enter "0" to delete selections
from the list. The seven available items for the strobe display
list are: (1) Preset A, (2) Preset B, (3) K-Factor A, (4) K-Factor B, (5) Rate of A, (6) Count A, (7) Count B. In the "A net
B" mode Count A will display the Net Count and Count B is
an invalid command and the unit will transmit useless data.
When setting the strobe list the unit will print :
ENTER STROBE LIST:
DO NOT DISPLAY-0 DISPLAY-1
The unit will prompt you:
PRESET A<DISPLAY>?
PRESET B<DISPLAY>?
K-FACTOR A<DISPLAY>?
K-FACTOR B<DISPLAY>?
RATE<DISPLAY>?
COUNT A<DISPLAY>?
COUNT B<DISPLAY>?
If the above choices are entered, when the strobe line is triggered (3-30V positive pulse) the unit will transmit:
DEVICE# 1:
PA XXXXX
PB XXXXX
KA XXXXX
KB XXXXX
DR XXXXXX
DA XXXXXX
DB XXXXXX
(SEE COMMANDS BELOW FOR DESCRIPTION OF COMMAND CODES).
Each time the strobe line gets triggered the unit will transmit
this data unless the program mode is entered and the strobe
list altered.
After these four items have been entered they will remain
unaltered unless the program mode is entered again and the
values changed. The unit is now set and must be addressed
by it's device number to come on line again.
18
Page 21
SERIAL INPUT COMMANDS:
To get a unit on line you must address it by it's device number.
This is done by typing DXX(S), XX= device number. The unit
comes on line and echoes back DEVICE# XX. Insure that
"DEVICE# XX:" is received before requests are sent. The
unit is now ready to receive a command or string of commands separated by a space. A carriage return (enter) will
enter the commands and processing of requests begins. The
carriage return (Hex Code "D") puts the unit "off line" after
data is processed.
COMMANDS:
EP...........Unit will enter program mode.
DA..........Unit will display (transmit) Count A.
DB..........Unit will display (transmit) Count B.
DR..........Unit will display (transmit) rate A.
KA..........Unit will display K-factor A.
†*KA(S)XXXXX....Unit will load K-factor A
with entered number.
KB..........Unit will display K-factor B
†*KB(S)XXXXX....Unit will load K-factor B
with entered number.
PA...........Unit will display Preset A.
†PA(S)XXXXX....Unit will load Preset A with
entered number.
PB...........Unit will display Preset B
†PB(S)XXXXX....Unit will load Preset B with
entered number.
RA..........Counter A will reset
†*RA(S)XXXXXX...Unit will set Counter A to
entered number.
RB..........Counter B will reset.
†*RB(S)XXXXXX...Unit will reset Counter B to
entered number.
*THE UNIT WILL RECOGNIZE A DECIMAL IF ONE IS
PLACED IN ANY OF THESE DATA VALUES.
†THE UNIT WILL ONLY RECOGNIZE THE LAST FIVE
DIGITS ENTERED (SIX DIGITS FOR RA & RB).
The following is an example of requests and responses:
Transmit from terminal Receive from unit
(s)=Space
D5(s) [Unit #5 Activated] DEVICE# 5:
PA(s)12345(s)PA PA 12345 PA
KA(s)1576(s)KA KA 1576 KA
KB(s)6751(s)KB KB 6751 KB
RA(s)RB[RETURN] RA RB
(UNIT PRESETS AND A & B K-FACTORS ARE SET AND
BOTH COUNTERS ARE RESET)
12345
1576
6751
SERIAL INTERFACE OPERATION:
Data is received and transmitted over standard EIA RS232
or RS422 levels. Each ten bit character is made up of a
start bit, seven bit ASCII code, a parity bit and a stop bit.
Device number, baud rate, parity and strobe list are entered
in the program setup mode and will remain in memory even
if power is lost.
The input impedance of RS232 is 3KΩ to 7KΩ worst case.
The terminal addressing the unit must be capable of driving
all loads in the loop. The input impedance of RS422 is much
higher and there should be no problem driving as many as
99 units. The transmit line remains in a high impedance "off"
state until addressed. Only one unit is to be on line at a time!!!
More than one unit on line could damage the unit or destroy
the transmitted data.
When the unit is active (on line) it will operate in a full duplex,
echo back mode, so that data sent from the terminal will be
transmitted back for verication. When the unit is "on line",
use the proper serial transmit commands to request data or
set a new value. Up to 80 characters of data can be linked
together and transmitted to the unit in a string as long as there
is a space between the commands. If an error is made, a
correction can be made by back spacing and retyping correct
data before the return (enter) is sent. Once a return (enter) is
sent, the unit begins processing the data and will transmit the
requested data on a non-priority basis over the data transmit
line. A keypad entry or incoming data will halt the data communication cycle. Therefore, there should be a pause after
data is requested to insure that all data has been transmitted
before making another request or addressing another unit. If
the unit is not busy, it should not take longer than 300 msec to
process each request. To nd the cycle time to process and
transmit a request, calculate the bit transmit time by using this
formula: [(1÷ baud rate) x (80) + .005] x number of requests
made. This time will be extended if the unit must service
the front keypad. If transmission has not started within two
seconds after data is requested, it can be assumed that there
is a problem. The unit transmits a carriage return and line
feed after each data value. Any new communication must be
started with DXX(S) (device number and space).
RS232/RS422 - IBM-PC INTERFACE:
The following program is for IBM basic to set up RS232/
RS422 on serial port (#1) at 300 baud. Run this program
after connecting the serial interface connections.
10 SCREEN 0,0:WIDTH 80
20 CLS:CLOSE
30 OPEN "COM1:300,n,7,1,CS,DS,CD" AS #1
40 ON ERROR GOTO 110
50 B$=INKEY$
60 IF B$< >"" THEN PRINT #1,B$;
70 IF EOF (1) THEN 50
80 A$=INPUT$ (LOC(1),#1)
90 PRINT A$;
100 GOTO 50
110 RESUME
19
Page 22
RS232 / RS422 WIRING
Unit 3 Unit 2 Unit 1
RS-232 PINOUT
12345
6789
1•INIT.
2•TX
3•RX
4•N/C
5•GND
6•STRB
7•N/C
8•N/C
9•N/C
2
3
5
2
3
5
2
3
5
RX (+)
RX (-)
TX (+)
TX (-)
GND
2
7
3
8
5
2
7
3
8
5
2
7
3
8
5
180Ω
180Ω
Unit 3 Unit 2 Unit 1
RS-422 to RS-232
Converter
RS-422 PINOUT
12345
6789
1•INIT.
2•TX (+)
3•RX (+)
4•N/C
5•GND
6•STRB
7•TX (-)
8•RX (-)
9•N/C
RS-232
Cable
A
RST
B C
D E
ENTER LOCK PRE A PRE B VIEW PRGM
TRANSMIT A (+) PIN (2)
GROUND PIN (5)
RS 422
TRANSMIT B (-) PIN (7)
STROBE PIN (6)
+12V PIN (7)
(BOTTOM BOARD)
A
RST
B C
D E
ENTER LOCK PRE A PRE B VIEW PRGM
TRANSMIT PIN (2)
GROUND PIN (5)
RS 232
STROBE PIN (6)
+12V PIN (7)
(BOTTOM BOARD)
RS-232 HOOKUP:
When connecting the unit to a computer with RS 232 communication, only three connections are needed. These connections are: Receive data, Transmit data and Ground. The
connections should be made as follows:
RS 422 HOOKUP:
When connecting the unit to a computer with RS 422, ve
connections are needed. These connections are: Receive
data A (+), Receive data B (-), Transmit data A (+), Transmit
data B (-) and Ground. The connections should be made as
follows:
DP -9 CONNECTOR COMPUTER
Transmit data (pin 2) Receive data
Receive data (pin 3) Transmit data
Ground (pin 5) Ground
DP -9 CONNECTOR COMPUTER
Transmit data A(+) (pin 2 Receive data A(+)
Transmit data B(-) (pin 7) Receive data B(-)
Receive data A(+) (pin 3) Transmit data A(+)
Receive data B(-) (pin 8) Transmit data B(-)
Ground (pin 5) Ground
PRINTER HOOKUP:
When connecting the unit to a printer, you must rst program
the desired baud rate, parity and strobe list with a computer.
After the unit is programmed it can be connected to the
printer. Connect the transmit line(s) of the unit to the receive
line(s) of the printer and be sure that both devices have common grounds. When the strobe line is triggered the unit will
transmit the selected strobe list which you had previously
programmed.
20
Page 23
TROUBLESHOOTING GUIDE
PROBLEM SOLUTIONSPOSSIBLE CAUSES
Power is applied to unit but the display
does not light.
Unit works, but occasionally the display
freezes or skips counts.
Input signal is connected but the unit
does not count or display rate.
Rate is displaying: r FFFFF.
1. AC or DC power wiring is incorrect.
1. Line noise is affecting the processor
due to a current spike or surge.
1. Input wiring is incorrect.
2. Scale factors are incorrect.
3. Transmitting device is defective.
4. Wrong debounce ltering selected.
5. Unit is defective.
1. The unit is trying to display a
number which it can't (too small or
too large).
2. Line noise affected unit on power
up.
1. Recheck power wiring
1. Use a different power supply or
install a surge suppressor.
1. Recheck input wiring.
2. Recheck scale factors and factor
calculations.
3. Replace transmitting device.
4. Recheck debounce ltering selection
"hi cps" or "lo cps".
5. To conrm set scale factors at one
and connect a wire to pin #7 and
touch it to pin # 5 (input A). Each
time pin #5 is touched counter A
should count once. If not, call
factory for RMA. (this test will not
work on units with quadrature input)
1. Check scaling factor, if it is correct,
lower the number of signicant
gures.
2. Reprogram the unit and be sure to
enter a decimal (enter one and re
move it if a decimal is not desired).
Relays are not activating properly.
Count e r res e t s be f o r e r e a c h ing
999999.
Various menu items are not being displayed.
1. Wrong relay duration.
2. Relay set for wrong activation
i.e. count instead of rate.
1. Relay duration is set at a value other
than 00.0. This causes the counter
to auto-reset at the preset.
1. The menu ow chart and the setup
steps show the setup for the units
with rate and total (NRT). When
using a unit which has only count
(NC2) or only rate (NR2,) several
menu items will not be displayed.
1. Recheck programmed relay duration.
2. Recheck programmed relay
activation mode.
1. If relay outputs are not being used,
set the relays for rate (NRT only).
2. Set the relay durations to 00.0.
1. The menu items which do not
appear are not used for the models
without the ratemeter (NC2) or
without the counter (NR2).
Therefore, disregard any menu
items which appear on the
owchart and setup steps, but do
not appear on the unit's display.
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