Laurel Electronics LTM CTR User Manual

LTM “CTR” SERIES

TRANSMITTERS

PULSE, AC or PROCESS TOTALIZER INPUT,

SERIAL DATA OUTPUT

OWNERS MANUAL

LAUREL Electronics Inc.

3183-G Airway Ave, Costa Mesa, CA, 92626, USA
Tel: [phone] Fax: [phone] Website: www.laurels.com

1. ORDERING GUIDE, LTM “CTR” SERIES TRANSMITTERS

Configure a model number in this format: LTM600VF1, CBL04

LTA Transmitter with serial I/O, Modbus or

Custom ASCII protocol. Includes 4-20 mA,
0-20 mA or 0-10V isolated analog output,
isolated 5V, 10V or 15V transducer excita­tion output, and dual solid state relays.
Default jumpered for full duplex RS485 and
RS232, and 10V excitation.

Main Board

6............................... Standard pulse or AC input

8............................... Extended pulse of AC input

Please see notes for “Extended”

Power

0............................................. 95-240 Vac ±10%

1....................................12-30 Vac or 10-48 Vdc

Relay Output

0................................................................. None

2....................................... Dual solid state relays

Input Type

FR .................. .. Dual Channel Pulse or AC Input

Standard main board

Frequency (2 channels), rate (2 channels), total
(2 channels), period, stopwatch, time interval.

Extended main board

Above plus rate and total simultaneously, linear­ized inputs using up to 180 points, arithmetic
functions applied to channels A & B (A+B, A-B,
A*B, A/B, A/B-1), phase angle, duty cycle, up/
down counting, batch control.

VF1 ............................... 4-20 mA Process Input

VF2 ................................. 0-1 mA Process Input

VF3 ................................. .. 0-10V Process Input

VF1 .............................................. Custom Input

Standard main board

Rate or total from analog process signals.
Selectable square root extraction for use with
differential pressure flow meters.

Extended main board

Above plus rate and total simultaneously (analog
totalizer), custom curve linearization using up to
180 points, batch control, and time based on
rate.

QD.................................................. .. Quadrature

Standard main board

Position or length from encoders. Accepts diffe­rential or single-ended inputs: 1x, 2x or 4x, plus
zero index.

Extended main board

Above plus bidirectional rate (rate and position
or length are not simultaneous).

ACCESSORIES

CBL04 ...... RS232 cable, 3-pin connector on

transmitter end, DB9 connector on
computer end.

CBL02 ...... USB to DB9 adapter cable.

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2. TABLE OF CONTENTS

1. ORDERING GUIDE, “CTR” SERIES TRANSMITTERS ........................................................ 2

2. TABLE OF CONTENTS ....................................................................................................... 3

3. INTRODUCTION, “CTR” SERIES TRANSMITTERS ............................................................ 4

4. RECEIVING & UNPACKING YOUR TRANSMITTER ........................................................... 5

5. SAFETY CONSIDERATIONS .............................................................................................. 5

6. TRANSMITTER FIELD WIRING ......................................................................................... 6

7. PROGRAMMING YOUR TRANSMITTER............................................................................ 8

8. OPENING YOUR TRANSMITTER CASE ............................................................................. 16

9. DUAL CHANNEL PULSE OR AC INPUT SIGNAL CONDITIONER BOARD........................... 17

10. V-TO-F CONVERTER SIGNAL CONDITIONER BOARD ...................................................... 21

11. QUADRATURE SIGNAL CONDITIONER BOARD ................................................................ 22

12. MAIN BOARD JUMPER SETTINGS ................................................................................... 24

13. DUAL RELAY OPERATION ............................................................................................... 25

14. INPUT SIGNAL FILTERING................................................................................................ 26

15. TRANSMITTER CALIBRATION .......................................................................................... 26

16. CUSTOM CURVE LINEARIZATION .................................................................................... 27

17. MODBUS PROTOCOL TRANSMITTER COMMUNICATIONS .............................................. 28

18. CUSTOM ASCII PROTOCOL TRANSMITTER COMMUNICATIONS .................................... 33

19. “CTR” SERIES TRANSMITTER SPECIFICATIONS ............................................................. 38

18. WARRANTY ...................................................................................................................... 40

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3. INTRODUCTION, “CTR” SERIES TRANSMITTERS

This manual covers “CTR” Series DIN rail transmitters with an isolated serial data output and a
pulse, AC or process signal input (converted to a frequency by the unit’s voltage-to-frequency
converter). The transmitters duplicate the signal conditioning and signal processing features of
their 1/8 DIN panel-mounted counter / timer counterparts for exceptional accuracy at high read
rate. A wide range of counter / timer functions are accommodated by three signal conditioners:

• Dual-channel pulse input signal conditioner (for frequency, rate, total, arithmetic combina­tions of two channels, stopwatch, timer, phase angle, duty cycle).

• Voltage-to-frequency signal conditioner (for rate or total from 4-20 mA, 0-1 mA or 0-10V
process signals).

• Quadrature signal conditioner (for position or rate from quadrature encoder signals).

Serial communications are standard.

The transmitter serial port

is default jumpered for RS232 or

full-duplex RS485 (same jumper settings). Half-duplex RS485 is also selectable either via internal
or external jumpers. Three serial protocols are software selectable: Modbus RTU, Modbus ASCII
and Custom ASCII. Modbus allows devices by different manufacturers to be addressed on the
same data line. The simpler Custom ASCII protocol is recommended when there are no devices by
other manufacturers on the data line.

An isolated 4-20 mA, 0-20 mA or 0-10V output is standard.

This output is generated by an

ultra­linear 16-bit digital to analog converter. It is scaled in software and tracks an internal linearized
digital reading.

An isolated transducer excitation output is standard. Three output levels are jumper selectable:
5V at 100 mA, 10V at 120 mA, or 24V at 50 mA.

Dual solid state relays are standard. 130 mA at 140 Vac or 180 Vdc.

Isolation to 250V rms is provided for power, signal input, analog output, relay outputs, and com-

munications. Isolation adds safety and avoids possible ground loops. The transducer excitation
output is isolated to 50V from signal ground.

Internal jumpers are used to select the signal range, communication type, and excitation level.
The transmitter configuration is specified by the model number on the transmitter label. A user
can reconfigure the transmitter by opening the case and moving jumpers.

Transmitter scaling is via serial connection to a PC using MS Windows based Instrument Setup
Software, which can be downloaded at no charge. The required transmitter-to-PC interface cable
is available for purchase.

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4. RECEIVING & UNPACKING YOUR TRANSMITTER

Your transmitter was carefully tested and inspected prior to shipment. Should the transmitter be
damaged in shipment, notify the freight carrier immediately. In the event the transmitter is not
configured as ordered or is inoperable, return it to the place of purchase for repair or replacement.
Please include a detailed description of the problem.

5. SAFETY CONSIDERATIONS

Warning: Use of this transmitter in a manner other than specified may impair the protection

of the device and subject the user to a hazard. Visually inspect the unit for signs of damage. If
the unit is damaged, do not attempt to operate.

Caution:

• This unit may be powered with AC (mains) from 95-240 Vac ±10% with the worldwide voltage

power supply option, or 12-30 Vac or 10-48 Vdc with the low voltage power supply option.
Verify that the proper power option is installed for the power to be used. This transmitter has
no AC (mains) switch. It will be in operation as soon as power is applied.

• The 95-240 Vac ±10% mains connector (P1 Pins 1-3) is colored Green to differentiate it from

other input and output connectors. The 12-30 Vac or 10-48 Vdc mains connector is colored
Black.

• To avoid dangers of electrocution and/or short circuit, do not attempt to open the case while

the unit is under power. However, signal wiring changes external to the case can be made
safely while the unit is under power.

• To prevent electrical or fire hazard, do not expose the transmitter to excessive moisture.

• Do not operate the transmitter in the presence of flammable gases or fumes. Such an

environment constitutes an explosion hazard.

•

Secure the transmitter to a 35 mm DIN rail.

Symbols used:

Caution (refer to accompanying documents)

Caution, risk of electric shock.

Earth (ground) terminal.

Both direct and alternating current.

Equipment protected throughout by double
insulation or reinforced insulation.

Operating environment:

Transmitter Class II (double insulated) equipment designed for use in Pollution degree 2.

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See manuals

for different

signal types

Control input 2

Control input 1

GND

Analog out - 1

Analog out + 2

AL2 1

AL2 2
AL1 3
AL1 4

6. TRANSMITTER FIELD WIRING

1
2
3
4
5
6

1
2
3

P6 Signal

input &
excitation
output

P5 Control
inputs 1 & 2

P4 Analog
output

P3 Solid
state relays

Signal

conditioner

board

P2 Serial

data I/O

P1 Power

input

RS485

6 N/C
5 ARX
4 ATX
3 GND
2 BRX
1 BTX

RS232

TX
RX
NC
GND
GND
N/C

3 Power GND
2 AC neutral or -DC
1 AC high or +DC

6 TX
5 RX
4 NC
3 GND
2 BRX
1 N/C

Transmitter

RS232 wiring

6 N/C
5 ARX / ATX
4 N/C
3 GND
2 BRX / BTX
1 N/C

Transmitter

RS485 wiring, half duplex

with internal jumpers.

5

9

4

8

3

7

2

6

1

DB9 connector

to PC

(rear view)

ATX / ARX

GND
BTX / BRX

Master

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6 N/C
5 ARX
4 ATX
3 GND
2 BRX
1 BTX

ATX
ARX
GND
BTX
BRX

Transmitter Master

RS485 wiring, full duplex-

6 N/C
5 ARX

ATX / ARX

4 ATX
3 GND
2 BRX

GND
BTX / BRX

1 BTX

Transmitter

Master

RS485 wiring, half duplex

with external jumpers.

P6 - SIGNAL INPUT DETAIL

digital logic, magnetic pickups, or AC inputs to 250V .

PROCESS / TOTALIZER SIGNAL INPUT

DC & Externally Powered Process

Excitation return 1

+ Excitation 2

- Signal input 3

+ Signal input 4

2-Wire Process Transmitter

Excitation return 1

+ Excitation 2

- Signal input 3

+ Signal input 4

QUADRATURE SIGNAL INPUTS

Differential or Complementary Inputs

A Input 1
A Input 2
B Input 3

B Input 4

Z Input (+Excitation) 5

Z Input (Exc. return) 6

Single Ended Inputs

A Input 1

+Excitation 2

B Input 3

Excitation return 4

Z Input 5

Signal Ground 6

-DC
+DC

+

-

A Channel In

B Channel In

Zero Index In or
Excitation Output

A Channel In
+ Power Output

B Channel In

- Power Output

Zero Index In
Sensor common

DUAL CHANNEL PULSE SIGNAL INPUT..

Single Powered Sensor Input

Excitation return 1

+ Excitation 2

+B Signal Input 3

Signal Ground 4

+A Signal Input 5

Signal Ground 6

Power to sensor

+

Sensor 1

-

Two Powered Sensor Inputs

Excitation return 1

+ Excitation 2

+B Signal Input 3

Signal Ground 4

+A Signal Input 5

Signal Ground 6

Power to sensor

+

Sensor 2

-

+

Sensor 1

-

Active and Passive Inputs

Excitation return 1

+ Excitation 2

+B Signal Input 3

Signal Ground 4

+A Signal Input 5

Signal Ground 6

Inputs can be proximity switches, contact closures,

Warning: Dual-channel signal grounds 4 & 6 are
connected internally.

MOUNTING FOR COOLING

P4 - ANALOG OUTPUT DETAIL

Driving a Load with 4-20 mA

Analog return 1

4-20 mA output 2

500 Ohms max

Driving a Load with 0-10V

Analog GND 1

0-10V output 2

5 kOhms min

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AL 1

AL 2

RESET

POWER

AL 1

AL 2

RESET

POWER

AL 1

AL 2

RESET

POWER

AL 1

AL 2

RESET

POWER

AL 1

AL 2

RESET

POWER

Mount transmitters with ventilation holes at
top and bottom. Leave minimum of 6 mm (1/4")
between transmitters, or force air with a fan.

7. PROGRAMMING YOUR TRANSMITTER

OVERVIEW

Our transmitters are easily programmed using a PC with an RS232 port and Instrument Setup
(IS) software, which provides a graphical user interface. The software allows uploading, editing,

downloading and saving of setup data, execution of commands under computer control, listing,
plotting and graphing of data, and computer prompted calibration.

USING IS SOFTWARE

Use a 3-wire RS232 cable (P/N CBL04) to connect your transmitter to the COM port of your PC.
Download the file

Install Instrument Setup Software
Start => Programs => IS2 => Instrument Setup

created. Following a brief splash screen, the

ISx_x_x.exe

from our website and double-click on the file name. Click on

and follow the prompts. To launch IS software, press on

or on the desktop icon that you may have

Communications Setup

screen will appear.

RS232 cable with rear view of DB9 connector to PC

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In the Communications Setup screen, select the
factory default setting. Select

RS-232 (USB)

button. This will take you to the

Transmitter LTA, LTM, LTS

Establish Communications

Custom ASCII

as the Device Type. Then click on the

as the protocol, as this is the

screen.

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In the

You will be able to change your protocol and baud rate later under the
tab. Click on
on the

From the

from your counter transmitter. Click on
easily edit the setup file using pull-down menus and other selection tools. You can download
(or put) your edited file into the transmitter by clicking on
your setup file to disk by clicking on
disk by click on

The best way to learn IS software is to experiment with it.

For detailed help on any data entry field under any tab, select that field and press on the F1

key.

Establish Communications

Establish

Main Menu

Main Menu

File

, and the two fields at the bottom of the screen should turn green. Click

button.

, click on

=>

Open

Counter

.

screen, select your Com Port and

=>

File

Get Setup

View

=>

=>

Save Setup

to retrieve (or get) the existing setup data

Setup

to bring up screens which allow you to

Counter

and retrieve a previously saved file from

=>

9600

as the Baud Rate.

Communication

Put Setup

. You can save

setup

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Click on

transmitter, then on
screen to set up

Counter

=>

Signal Input, Display

Get Setup

View

=>

to retrieve the current setup information from your counter

Setup

, which will take you to the

, and

Control Inputs

.

Input+Display

tab. Use this

Click on the

methods: 1) direct entry of Scale and Offset, and 2) the Coordinates of 2 Points method, where
(Low In, Low Read) and (High In, High Read) data points are entered numerically.

Reminder: for detailed help on any data entry field under any tab, select that field and press on
the F1 key.

Scaling

tab to scale your transmitter. You will be given the choice of two scaling

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Click on the

Filter

tab to set to set up filtering for your readings.

Click on the

Relay Alarms

tab to set up your transmitter’s two solid state relays, which are

standard.

Reminder: for detailed help on any data entry field under any tab, select that field and press on
the F1 key.

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