mbj CTR-52 Operating Instructions Download Page 2

24V DC

24V DC

20 mA

Trigger LED 1 

from Camera/ PLC

PC or PLC

Modbus Server

Trigger 

GND

24V DC

20 mA

24V DC

20 mA

24V DC

20 mA

Trigger LED 2 

from Camera/ PLC

Trigger LED 3 

from Camera/ PLC

Trigger LED 4 

from Camera/ PLC

CTR-52

Modbus Slave

1 Tr.1 
2 Tr.2 
3 Tri.3 
4 Tri.4
5 Tri GND
6
7

LED 1 (+)

LED 1 (-)   

LED 2 (+)

LED 2 (-)   

LED 3 (+)

LED 3 (-)   

LED 4 (+)

LED 4 (-) 

1k2

1k2

1k2

1k2

LED

Driver 

LED

Driver 

LED

Driver 

LED

Driver 

Specification

CTR-52

Electrical parameter

Operating Voltage

24V DC / 4A

12V - 26V, min. 2V above the forward voltage of 

the LED light source

LED steady current

1)

 

(ON & AUTO mode)

1 Channel: 1800mA

 

2 Channels: 1500mA p. Channel 

3 Channels: 1200mA p. Channel

 

4 Channels:   900mA p. Channel

LED flash current

2)

 

100mA...21A

Min flash duration

10µs  

depending on LED working point 

and duty cycle

              Max. flash duration

59s

Max. flash latency

3)

3µs

Flash duration & delay: 

smallest  adjustable  step   

1µs

Voltage range for LED modules

approx. 2.5V to 22V

Mechanical parameter

Dimension (H x W x D)

53mm x 80mm x 93mm

Weight 

220g

Connectors

1x  2 Pin plug contact (RM5.08), 

 

1x 7 Pin plug contact (RM3.81), 

 

4x 2 Pin inv. plug contact (RM3.81)

 

1x RJ45 Ethernet

Certifications

CE, RoHS

Degree of protection

IP20 (made for control cabinet)

Humidity

30% to 70%

Operating temperature

10°C to 30°C

Accessories

Top rail mounting clip and plugs (scope of de-

livery). For cable, mounts and lighting modules 

please check www.mbj-imaging.com

1) LED current less than 100mA may cause LED light jitter

2) The flash energy is provided by a capacitor and requires sufficient time for 

recharging. The flash energy (flash frequency * flash duration * current) is limited 

to 1A.  E.g.: 100 flashes/s * 100µs * 30A = 0.3A

3) The higher the current and the shorter the cycle time,  the greater the latency 

can be

Electrical Connections

Pin Pin Name

CTR-52 Function

Comment

1

24VDC

24V DC

Power supply input

2

GND

Ground

Power supply ground

Pin Name

Function

Comment

3

Tr.1

Trigger1 12-24V

 1)

Internally opto-coupled

4

Tr.2

Trigger2  12-24V

Internally opto-coupled

5

Tr.3

Trigger3 12-24V

Internally opto-coupled

6

Tr.4

Trigger4  12-24V

Internally opto-coupled

7

Tr. GND

Trigger ground

Common Tr. ground, isolated

8

--

not used

9

--

not used

Pin Name

Wire

2)

Output to light

10

LED1+

black + blue

Channel 1

11

LED1-

3)

white + brown

Channel 1

12

LED2+

black + blue

Channel 2

13

LED2-

3)

white + brown

Channel 2

14

LED3+

black + blue

Channel 3

15

LED3-

3)

white + brown

Channel 3

16

LED4+

black + blue

Channel 4

17

LED4-

3)

white + brown

Channel 4

Port

Function

Comment

Eth

RJ45 network

Modbus over Ethernet

1) Signal high >=10V, signal low <=5V

2) For MBJ connecting cable and MBJ LED light (-x) without integrated controller 

3) Do 

NOT

 connect LED(-)to the external ground of the power supply or the ground of 

the trigger signal! This might destroy connected lights or devices

Operating Mode

Mode

CTR-52 Function

STEADY

Continuous light, LED always on 

AUTO

LED output follows the trigger status

FLASH

1)

Manual set-up for flash, delay and duration via Modbus protocol

OFF

LED output is switched off

1) The CTR-52 factory setting of the operation mode is FLASH. Other operating modes 

are selectable via the Modbus interface

24V DC

20 mA

Trigger LED 1 

from Camera/ PLC

CTR-52

Modbus Slave

1 Tr.1 
2 Tr.2 
3 Tri.3 
4 Tri.4
5 Tri GND
6
7

LED 1 (+)

LED 1 (-)   

LED 2 (+)

LED 2 (-)   

LED 3 (+)

LED 3 (-)   

LED 4 (+)

LED 4 (-) 

PC or PLC

Modbus Server

1k2

1k2

1k2

1k2

Trigger 

GND

20 mA

20 mA

20 mA

Trigger LED 2 

from Camera/ PLC

Trigger LED 3 

from Camera/ PLC

Trigger LED 4 

from Camera/ PLC

1k2

1k2

1k2

1k2

24V DC

24V DC

24V DC

24V DC

LED

Driver 

LED

Driver 

LED

Driver 

LED

Driver 

Triggered light with PNP sourcing 

TTL triggered light with sinking output (inverted strobe signal)

Application Samples for CTR-52 Controller

Modbus Control

Hardware

The standard fieldbus provided with the CTR LED controller product line is 

based on Modbus TCP. Modbus is a data communications protocol for use 

with programmable logic controllers (PLCs). 

Modbus Setup Information 

The CTR controller is a Modbus device that allows you to access the light 

settings via Ethernet. The controller communicates using a master-slave tech-

nique in which only one device (the master) can initiate transactions (called 

queries). The other devices (slaves) respond by supplying the requested data 

to the master, or by taking the action requested in the query.

The CTR light controller is implemented as a Modbus slave. The CTR receives 

messages from the master, processes them and responds to them. The pro-

duct does not send messages by itself.

Modbus Setup Information

Modbus Type:  

Slave (Server)

Modbus Format: 

Modbus TCP

Output Data Mode: 

Auto

Notes

‒ The default device IP address is 192.168.0.99. The address can be changed 

via the command line tool provided with the MBJ software package

‒ 

The RESET Button on the back of the device can be used to return to the 

factory default settings

‒ 

Please refer to the fieldbus communication protocol definition for details

Software

The CTR-52 can be programmed via different alternative methods:  

‒ 

 Direct Modbus access for which a detailed protocol definition is provided

‒  SDK library to integrate the communication into your software

‒  The easy to use MBJ software user interface based on MS Windows 10®

For further information and download of the CTR-52 software components 

visit: www.mbj-imaging.com/en/products/led-controller

Flash Capacity of CTR-52

-

 4V     

-

 12V     -22V 

Flash duration [µs]

Max C

urr

ent [A]

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