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red lion PAXDR Series, Data Sheet / Manual

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red lion PAXDR Series Data Sheet / Manual Download Page 9

9

RS232 Communications

RS232 is intended to allow two devices to communicate over distances up to 

50 feet. Data Terminal Equipment (DTE) transmits data on the Transmitted Data 
(TXD) line and receives data on the Received Data (RXD) line. Data Computer 
Equipment (DCE) receives data on the TXD line and transmits data on the RXD 
line. The PAX emulates a DTE. If the other device connected to the meter also 
emulates a DTE, the TXD and RXD lines must be interchanged for 
communications to take place. This is known as a null modem connection. Most 
printers emulate a DCE device while most computers emulate a DTE device.

Some devices cannot accept more than two or three characters in succession 

without a pause in between. In these cases, the meter employs a busy function.

As the meter begins to transmit data, the RXD line (RS232) is monitored to 

determine if the receiving device is “busy”. The receiving device asserts that it 
is busy by setting the RXD line to a space condition (logic 0). The meter then 
suspends transmission until the RXD line is released by the receiving device.

RS485 Communications 

The RS485 communication standard allows the connection of up to 32 

devices on a single pair of wires, distances up to 4,000 ft. and data rates as high 
as 10M baud (the PAX is limited to 19.2k baud). The same pair of wires is used 
to both transmit and receive data. RS485 is therefore always half-duplex, that 
is, data cannot be received and transmitted simultaneously.

12

12

B

(

-

)

33K

33K

33K

33K

+5V

+5V

Transmit

Transmit

Enable

Enable

PAX METER

PAX METER

RECEIVING DEVICE

RECEIVING DEVICE

A

(+)

(+)

COMM.

COMM.

 

*

NC

NC

 

*

 

OPTIONAL

OPTIONAL

13

13

14

14

15

15

RS485 Terminal Block Connection Figure

12

TXD

RXD

COMM.

PAX METER (DTE)

RECEIVING DEVICE

2

NC

RXD

TXD

3

3

2

7

5

5

DTE

3

2

DB9

13

14

15

DTE

DCE

DB25

DB25

RS232 Terminal Block Connection Figure

ANALOG OPTION CARD FIELD TERMINALS

5.0 R

EVIEWING

 

THE

 F

RONT

 B

UTTONS

 

AND

 D

ISPLAY

Totalizer

Display

Annunciators*

Setpoint Alarm
Annunciators

RST

DSP

PAR

F1

F2

A

C

B

SP1

SP3

SP2

SP4

8.8.8.8.8.8.

List B Active
Indicator

  * Totalizer A, B, and C are locked out in Factory Settings.
** Factory setting for the F1 F2 and RST keys is NO mode.

Advances selected digit location in parameter values

Reset (Function key) **

RST

Decrement selected parameter value or selections

Function key 2; hold for 3 seconds for Second Function 2 **

F2

Increment selected parameter value or selections

Function key 1; hold for 3 seconds for Second Function 1 **

F1

Store selected parameter and index to next parameter

Access Programming Mode

PAR

Quit programming and return to Display Mode

Index display through the selected displays.

DSP

PROGRAMMING MODE OPERATION

DISPLAY MODE OPERATION

KEY

4.5  SERIAL COMMUNICATION WIRING

4.6  ANALOG OUTPUT WIRING

1

5

9

6

PIN 3  RXD
PIN 5  COMMON

FEMALE

PIN 2  TXD

Extended Comms Connection Figure

3

5

4

2

PAX CONNECTOR

Not used

Not used

Not used

B-

A+

COMM

Extended Comms Connection Figure

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

Summary of Contents for PAXDR Series

Page 1: ...ds provide dual FORM C relays 5 A quad FORM A relays 3 A or either quad sinking or quad sourcing open collector logic outputs The outputs can be assigned to any of the Rate or Totalizer display values and configured to suit a variety of control and alarm requirements The linear DC output Plug in card provides either 20 mA or 10 V signals The output can be scaled independent of the input range and ...

Page 2: ...PAXCDS10 Quad Setpoint Relay Output Card PAXCDS20 Quad Setpoint Sinking Open Collector Output Card PAXCDS30 Quad Setpoint Sourcing Open Collector Output Card PAXCDS40 PAXCDC RS485 Serial Communications Card with Terminal Block PAXCDC10 Extended RS485 Serial Communications Card with Dual RJ11 Connector PAXCDC1C RS232 Serial Communications Card with Terminal Block PAXCDC20 Extended RS232 Serial Comm...

Page 3: ...user inputs are inherently a logic input with no low frequency filtering Any mechanical contacts used for these inputs in a dual count mode must be debounced externally The user input may only be selected for sink source by the User Jumper placement 8 USER INPUTS Three programmable user inputs Max Continuous Input 30 VDC Isolation To Sensor Input Commons Not isolated Logic State Jumper selectable ...

Page 4: ...Voltage 240 Vrms Contact Rating One Relay Energized 5 amps 120 240 VAC or 28 VDC resistive load 1 8 HP 120 VAC inductive load Total current with both relays energized not to exceed 5 amps Life Expectancy 100 K cycles min at full load rating External RC snubber extends relay life for operation with inductive loads Response Time 5 msec nominal pull in with 3 msec nominal release Timed Output Accurac...

Page 5: ...ds Remove all power to the meter and load circuits before accessing inside of the meter 6 5 4 3 2 1 ON Input B SRC Input B LO Freq Input B MAG Input A LO Freq Input A SRC Input A MAG SNK HI Freq Logic HI Freq SNK Logic Factory Setting Installation The PAX meets NEMA 4X IP65 requirements when properly installed The unit is intended to be mounted into an enclosed panel Prepare the panel cutout to th...

Page 6: ...ling the card hold the meter by the rear terminals and not by the front display board 2 Install the Plug in card by aligning the card terminals with the slot bay in the rear cover Be sure the connector is fully engaged and the tab on the Plug in card rests in the alignment slot on the display board 3 Slide the meter base back into the case Be sure the rear cover latches fully into the case 4 Apply...

Page 7: ...nded This is especially useful in applications where cable runs are long and portable two way radios are used in close proximity or if the installation is near a commercial radio transmitter 4 Signal or Control cables within an enclosure should be routed as far as possible from contactors control relays transformers and other noisy components 5 In extremely high EMI environments the use of externa...

Page 8: ...INPUT A INPUT B 12V COMM 2 1 3 ON AC Inputs From Tach Generators Etc Input A Two Wire Proximity Current Source Input A Magnetic Pickup Input A Current Sourcing Output Input A Interfacing With TTL Input A Current Sinking Output Input A Switch or Isolated Transistor Current Sink Input A 6 3 4 5 NPN O C COMM 12V INPUT B INPUT A 3 2 1 ON Current Sink Output Quad Direction Totalizer A Switch or Isolate...

Page 9: ...smitted simultaneously 12 12 B 33K 33K 33K 33K 5V 5V Transmit Transmit Enable Enable PAX METER PAX METER RECEIVING DEVICE RECEIVING DEVICE A COMM COMM NC NC OPTIONAL OPTIONAL 13 13 14 14 15 15 RS485 Terminal Block Connection Figure 12 TXD RXD COMM PAX METER DTE RECEIVING DEVICE 2 NC RXD TXD 3 3 2 7 5 5 DTE 3 2 DB9 13 14 15 DTE DCE DB25 DB25 RS232 Terminal Block Connection Figure ANALOG OPTION CARD...

Page 10: ... a digit is selected the arrow keys are used to increment or decrement that digit to the desired number PROGRAMMING MODE EXIT DSP KEY or at PAR KEY The Programming Mode is exited by pressing the DSP key from anywhere in the Programming Mode or the PAR key with displayed This will commit any stored parameter changes to memory and return the meter to the Display Mode If a parameter was just changed ...

Page 11: ... Rate A and Rate B RATE C CALCULATION Set the Display Multiplier to obtain the desired Rate C display resolution For Rate C percentage calculations the result is internally multiplied by 100 to show percent as a whole number By using a Display Multiplier of 10 100 or 1000 along with the proper decimal point position percentage can be shown in tenths hundredths or thousandths respectively RATE C DI...

Page 12: ... using the arrow keys to to to RATE A INPUT VALUE FOR SCALING POINT 2 Enter the corresponding Rate A Input Value for the second Scaling Point by using the arrow keys Rate Input values for scaling points can be entered by using the Key in or the Applied method described below Key in Method Enter the Rate Input value that corresponds to the entered Rate Display value by pressing the F1 or F2 keys Th...

Page 13: ...nd INPUT x DISPLAY x RATE PER RATE B DISPLAY VALUE FOR SCALING POINT 2 Enter the desired Rate B Display Value for the second Scaling Point by using the arrow keys to RATE B INPUT VALUE FOR SCALING POINT 2 Enter the corresponding Rate B Input Value for the second Scaling Point by using the arrow keys Rate Input values for scaling points can be entered by using the Key in or the Applied method to Ro...

Page 14: ...gramming for rear terminal user inputs and front panel function keys Three rear terminal user inputs are individually programmable to perform specific meter control functions While in the Display Mode the function is executed when the user input transitions to the active state Refer to the user input specifications for active state response times Certain user input functions are disabled while the...

Page 15: ... DESCRIPTION FACTORY Setpoint 1 Setpoint 2 Setpoint 3 Setpoint 4 Setpoint 4 Setpoint 3 Setpoint 2 Setpoint 1 FACTORY DESCRIPTION DISPLAY HOLD SETPOINT STATE The meter holds the state of the setpoints configured as as long as activated maintained action This action only functions with a Setpoint plug in card installed ACTIVATE SETPOINT MOMENTARY EDGE When activated momentary action the meter activa...

Page 16: ...ck Programming Mode RATE A B C DISPLAY LOCK OUT TOTALIZER A B C DISPLAY LOCK OUT These displays can be programmed for or The setpoint values can be programmed for or Accessible only with a Setpoint Plug in card installed SETPOINT 1 to 4 ACCESS LOCK OUT to Count Load values can be programmed for or TOTALIZER A and B COUNT LOAD ACCESS LOCK OUT The Scale Factor values can be programmed for or TOTALIZ...

Page 17: ...ALr Totalizer x Scale Multiplier 6 4 MODULE 4 TOTALIZER A B SETUP PARAMETERS PARAMETER MENU x Totalizer A or B Module 4 is the programming for Totalizer A and Totalizer B Totalizer B parameters follow Totalizer A For maximum input frequency the totalizers should be set to mode NONE when they are not in use When set to NONE the remaining related parameters are not accessible A corresponding annunci...

Page 18: ...1 x 1 0 8333 General Rules on Scaling 1 It is recommended that the scale factor be as close as possible to but not exceeding 1 00000 This can be accomplished by increasing or decreasing the totalizer decimal point position using the scale multiplier or selecting a different totalizer mode 2 To double the number of pulses per unit use totalizer modes direction X2 or quad X2 To increase it by four t...

Page 19: ...actor is explained in Module 2 Select the calculation for Totalizer C display SELECTION ACTION No Calculation Totalizer C disabled TOTALIZER A Totalizer C shows Totalizer A with additional scaling applied per the Totalizer C scaling parameters SUM A B Totalizer C shows the sum of Totalizer A and Totalizer B DIFFERENCE A B Totalizer C shows the difference of Totalizer A and Totalizer B RATIO A B To...

Page 20: ...s Yes Yes Setpoint Tracking Yes Yes Yes Yes Yes Yes Setpoint Boundary Type Yes Yes Yes No Yes No Setpoint Standby Operation Yes Yes Yes No Yes No Setpoint Hysteresis No Yes No No No No Setpoint Off Delay No Yes No No No No Setpoint On Delay Yes Yes Yes No No No Setpoint Time Out Yes No No Yes No No Totalizer Auto Reset No No No Yes No Yes Reset With Display Reset No No No Yes No Yes Reset When Spn...

Page 21: ...onfigured as in Module 3 Note An Exchange Parameter Lists feature for setpoint values is explained in Module 2 SETPOINT TRACKING If a selection other than is chosen then the value of the setpoint being programmed n will track the entered selection s value Tracking means that when the selection s value is changed in the Quick Programming Mode the n setpoint value will also change or follow by the s...

Page 22: ...2 activates and SP4 when SP1 activates The last setpoint will wrap around to the first Select so the setpoint output will deactivate reset when SPn 1 activates and then times out deactivates This function may only be used if the SPn 1 is programmed for Setpoint Action of Example SP1 deactivates when SP2 is activated and then times out The last setpoint will wrap around to the first SETPOINT RESET ...

Page 23: ... force the frame size to 10 bits METER ADDRESS Enter the serial meter node address With a single unit an address is not needed and a value of zero can be used With multiple units RS485 applications a unique 2 digit address number must be assigned to each meter 7 SrL bAUd dAtA PAR PAr Addr Ab tot Pro C tot SCFAC CntLd SPt OPt Abbr NO YES Baud Rate Meter Address Parity Bit Data Bit Print Setpoint Va...

Page 24: ...T and V Commands Command String Examples 1 Address 17 Write 350 to Setpoint 1 String N17VM350 2 Address 5 Read Rate A value response time of 50 100 msec min String N05TA 3 Address 0 Reset Setpoint 4 output String RS Transmitting Data To the Meter Numeric data sent to the meter must be limited to Transmit Details listed in the Register Identification Chart Leading zeros are ignored Negative numbers...

Page 25: ... 1 on and output 2 off 10 000 20 000 9 9975 19 996 5 000 12 000 0 0025 4 004 0 000 4 000 0 10V 4 20 mA 20 000 4095 19 995 4094 10 000 2047 Output Signal Register Value 0 005 1 0 000 0 0 20 mA COMMAND RESPONSE TIME The meter can only receive data or transmit data at any one time half duplex operation During RS232 transmissions the meter ignores commands while transmitting data but instead uses RXD ...

Page 26: ...ze to the start of a new transmission start bit of next byte The receiver then continuously looks for the occurrence of the start bit If 7 data bits and no parity is selected then 2 stop bits are sent from the PAX meter Character Frame Figure LOGIC RS232 RS485 INTERFACE STATE 1 TXD RXD 3 to 15 V a b 200 mV mark idle 0 TXD RXD 3 to 15 V a b 200 mV space active Voltage levels at the Receiver PAR Pro...

Page 27: ...cy reduce scaling values display capacity exceeded Divide by 0 condition exists for Display C calculation MODULES or PARAMETERS NOT ACCESSIBLE CHECK Corresponding plug in card installation related controlling parameter selected ERROR CODE PRESS Reset key if unable to clear contact factory SERIAL COMMUNICATIONS CHECK Wiring connections meter and host settings Analog Output Card Calibration Before s...

Page 28: ...B SCALING PT 10 DISPLAY VALUE B SCALING PT 10 INPUT VALUE RATE B DISPLAY ROUNDING Parameter only appears when RATE C is enabled Parameter only appears when RATE C is disabled User Input and Function Key Parameters DISPLAY PARAMETER FACTORY SETTING USER SETTING USER INPUT 1 USER INPUT 2 USER INPUT 3 FUNCTION KEY 1 FUNCTION KEY 2 RESET KEY SECOND FUNCTION KEY 1 SECOND FUNCTION KEY 2 Display and Prog...

Page 29: ...LOW SCALE VALUE ANALOG HIGH SCALE VALUE Factory Service Parameters DISPLAY PARAMETER FACTORY SETTING USER SETTING DISPLAY INTENSITY LEVEL Setpoint Alarm Parameters DISPLAY PARAMETER FACTORY SETTING USER SETTING FACTORY SETTING USER SETTING FACTORY SETTING USER SETTING FACTORY SETTING USER SETTING SETPOINT OUTPUT LOGIC SETPOINT ANNUNCIATORS SETPOINT ASSIGNMENT SETPOINT ACTION SETPOINT POWER UP STAT...

Page 30: ... 30 This page intentionally left blank Courtesy of Steven Engineering Inc 230 Ryan Way South San Francisco CA 94080 6370 Main Office 650 588 9200 Outside Local Area 800 258 9200 www stevenengineering com ...

Page 31: ...int Hysteresis Stb n Standby Operation PAR tOFF n Off Time Delay AUtO n Total Auto Reset tOUt n Time out Value Output Reset When Display Resets rSd n rSAS n Output Reset when SPn 1 Deactivates rSAE n PAR Data Bits Parity Bit Meter Address Abbreviated Printing Print Options bAUd 7 SrL dAtA Addr Abbr OPt PAr PAR 8 AnA ASIN Analog Type tYPE AN LO AN HI Analog Assignment Analog Low Scale Value Analog ...

Page 32: ...s all liability for any affirmation promise or representation with respect to the products The customer agrees to hold Red Lion Controls harmless from defend and indemnify RLC against damages claims and expenses arising out of subsequent sales of RLC products or products containing components manufactured by RLC and based upon personal injuries deaths property damage lost profits and other matters...

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