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invt IVC1L Series PLC User Manual

invt IVC1L Series PLC User Manual

This quick start manual is to offer you a quick guide to the design,  installation, connection and maintenance of IVC1L series PLC, convenient for on-site reference. Briefly introduced in this booklet are the hardware specs, features, and usage of IVC1L series PLC, plus the optional parts and FAQ for your reference. For ordering the above user manuals, contact your INVT distributor or sales office.


The model designation is shown in the following figure.

To Customers:
Thank you for choosing our products. To improve the product and provide better service for you, could you please fill in the form after the product has been operated for 1 month, and mail or fax it to our Customer Service Center? We will send you an exquisite souvenir upon receiving the complete Product Quality Feedback Form. Furthermore, if you can give us some advices on improving the product and service quality, you will be awarded a special gift. Thank you very much! Shenzhen INVT Electric Co., Ltd.

Customer name:
Zip code:
Date of use:
Machine SN:
Appearance or structure:
Quality problem during usage:
Suggestion about improvement:

Address: INVT Guangming Technology Building, Songbai Road, Matian, Guangming District, Shenzhen, China Tel: +86 23535967


The outline of the basic module is shown in the following figure by taking the example of IVC1L-1614MAR.

PORTO and PORT1. PORT2 are communication terminals. PORTO uses RS232 mode with Mini DIN8 socket. PORT1 and PORT2 Have Double RS485. The busbar socket is for connecting the extension module. The mode selection switch has three positions: ON, TM and OFF.

Terminal Introduction

The layouts of terminals of different I/O points are shown below:

14-point, 16-point, 24-point

Power Supply

The specification of PLC built-in power and power for extension modules is sted in the following table.

Item Unit MM. Rated Max. Note
Power supply
Vac 85 220 264 Normal startup and operation
Input current A / / 1.5 Input: 90Vac, 100% output
5V/GND mA / 900 / The total power of outputs
5V/GND     and    24V/GND   5

10.4W.       Max. output power:
24.8W (sum of all branches)

24V/GND mA / 300 /


mA / 600 /

Digital Inputs & Outputs

Input Characteristic And Specification

The input characteristic and specs are shown as follows:

Item High-speed input
terminals X0—X7
General input terminal


Input mode Source mode or sink mode, set through s/s terminal
Input voltage 24Vdc
Input impedance 33″0 14.3k0
Input ON External circuit resistance < 4000
Input OFF External circuit resistance > 24k0
filter X0—X7 have digital filtering function. Filtering time: 0, 8, 16, 32 or 64ms (selected through user programme) 8,
Hardware filter Input terminals other than X0—X7 are of hardware filtering. Filtering time: about 10ms
High-speed function X0—X7: high-speed counting, interrupt, and pulse catching

XO and X1: up to 50kHz counting frequency X2—X5: up to 10kHz counting frequency

The sum of input frequency should be less than 60kHz

Common terminal Only one common terminal: COM

The input terminal act as a counter has a limit over the maximum frequency. Any frequency highe than that may result in incorrect counting or abnormal system operation. Make sure that the input terminal arrangement is reasonable and external sensors used are proper.

Input connection example

The following diagram shows an example of IVC1L-1614MAR in connection with an IVC1-0808ENR, which realizes simple positioning control. The positioning signals from the PG are input through high speed counting terminals XO and X1, the limit switch signals that require high-speed response can be input through high-speed terminals X2—X7. Other user signals can be input through any other input terminals.

Output Characteristic And Specification

The following table shows the relay output and transistor output.

Item Relay output Transistor output
Output mode When output state is ON, the circuit is closed; OFF, open
Common teminal Divided into multiple groups, each with a common terminal COMn, suitable for control circuits with different potentials. All common terminals are isolated from each other
Item Relay output Transistor output
Voltage 220Vac; 24Vdc, no


24Vdc, correct polarity required
Current Accord with output electric specs (see following Table )
Difference High driving voltage, large current Small driving current, high frequency, long lifespan
Application Loads with low action frequency such as intermediate relay, contactor coil, and LEDs Loads with high frequency and long life, such as control servoamplifier and electromagnet that action frequently

The electric specs of outputs is shown in the following table.

Item Relay output
Transistor output
Switched voltage Below 250Vac, 30Vdc 5-24Vdc
Circuit isolation By Relay PhotoCoupler
Operation indication Relay output contacts closed, LED on LED is on when optical coupler is driven
Leakage current of
open circuit
1 Less than 0.1mA/30Vdc
Minimum load 2mA/5Vdc 5mA (5-24Vdc)
Max. output current Resistive load 2N1 point;

8N4 points, using a COM

8N8 points, using a COM

YO/Y1/ Y2/Y3: 0.3N1 point. Others: 0.3N1 point, 0.8A/4 point, 1.2N6 point, 1.6N8 point. Above 8 points, total current increases 0.1A at each point increase
Inductive load 220Vac, 80VA YO/Y1/ Y2/Y3: 7.2W/24Vdc Others: 12W/24Vdc
Illumination load 220Vac, 100W YO/Y1/ Y2/Y3: 0.9W/24Vdc Others: 1.5W/24Vdc
OFF—PON 20ms Max YO/Y1/ Y2/Y3: 10us Others: 0.5ms
I ON—.OFF 20ms Max
YO, Y1 max. output
/ Each channel: 100kHz
112, Y3 max. output
/ Each channel: 10kHz
Output common
YO/ Y1-COMO; Y2/Y3-COM1. After Y4, Max 8 terminals use one isolated common terminal
Fuse protection No

Output connection example

The following diagram shows an example of IVC1L-1614MAR in connection with an IVC1-0808ENR. Different output groups can be connected to different signal circuits with different voltages. Some (like YO-COMO) are connected to the 24Vdc circuit powered by local 24V-COM, some (like Y2-COM1) are connected to the 5Vdc low voltage signal circuit, and others (like 114-117) are connected to the 220Vac voltage signal circuit.

Communication Port

IVC1L series PLC basic module has three serial asynchronous communication ports: PORTO, PORT1, and PORT2. Supported baud rates:

115200 bps 57600 bps 38400 bps 19200 bps
9600 bps 4800 bps 2400 bps 1200 bps

The mode selection switch determines the communication protocol.

As a terminal dedicated to user programming, PORTO can be converted to programming protocol through the mode selection switch. The relationship between PLC operation status and the protocol used by PORTO is shown in the following table.

Mode selection switch position status PORTO operation protocol
ON Running Programming protocol, or Modbus protocol, or free-port protocol, or N: N network protocol, as determined by user program and system configuration
Converted to programming protocol
OFF Stop
OFF Stop If the system configuration of user program is free-port protocol, it converts to programming protocol automatically after stop; or system protocol keeps unchanged

PORT1 PORT2 are ideal for connection with equipment that can
communicate (such as inverters). With Modbus protocol or RS485 terminal free protocol, it can control multiple devices through the network. Its terminals are fixed with screws. You can use a shielded twisted-pair as the signal cable to connect communication ports by yourself.


PLC is applicable to Installation category II, Pollution degree 2.

Installation Dimensions

Model Length Width Height Weight
IVC1 L-0806MAR, IVC1 L-0806MAT 135mm 90mm 71.2mm 440g
IVC1L-1208MAR, IVC1L-1208MAT 440g
IVC1 L-1410MAR, IVC1 L-1410MAT 470g
IVC1 L-1614MAR, IVC1 L-1614MAT 150mm 90mm 71.2mm 650g
IVC1L-2416MAR, IVC1L-2416MAT, IVC1L-1614MAR1, IVC1 L-1614MAT1 182mm 90mm 71.2mm 750g
IVC1 L-3624MAR, IVC1L-3624MAT 224.5mm 90mm 71.2mm 950g

Installation Method

DIN rail mounting

Generally you can mount the PLC onto a 35mm-wide rail (DIN), as shown in the following figure.

Screw fixing

Fixing the PLC with screws can stand greater shock than DIN rail mounting.
Use M3 screws through the mounting holes on PLC enclosure to fix the PLC onto the backboard of the electric cabinet, as shown in the following figure.

Cable Connection And Specification

Connecting power cable and grounding cable

The connection of AC power and auxiliary power is demonstrated in the following figure.
We suggest you wire a protection circuit at the power supply input terminal.
See the figure below

Connect the PLC terminal to the grounding electrode. To ensure reliable grounding cable connection, which makes the equipment safer and protects it from EMI.use AWG12—16 cable, and make the cable as short as possible. Use independent grounding. Avoid sharing route with the grounding cable of other equipment (particularly those with strong EMI). See the following figure.

Cable specification 

When wiring a PLC, use multi-strand copper wire and ready-made insulated terminals to ensure the quality. The recommended model and the cross-sectional area of the cable are shown in the following table.

Cable Cross-sectional




Cable lug and

heat-shrink tube

AC power

cable (L, N)

1.0-2.0mm2 AWG12, 18 H1.5/14 round insulated

lug, or tinned cable lug

Earth cable () 2.0mm2 AWG12 H2.0/14 round insulated

lug, or tinned cable end

Input signal

cable (X)

0.8-1.0mm2 AWG18, 20 UT1-3 or OT1-3

solderless lug

03 or 004 heat shrinkable



signal cable


0.8-1.0mm2 AWG18, 20

Fix the prepared cable head onto the PLC terminals with screws. Fastening torque: 0.5-0.8Nm.
The recommended cable processing-method is shown in the following figure.

Power-on Operation And Maintenance


Check the cable connection carefully. Make sure that the PLC is clear of alien objects and the heat dissipation channel is clear.

  1. Power on the PLC, the PLC POWER indicator should be on.
  2. Start the AutoStation software on the host and download the compiled user program to the PLC.
  3. After checking the download program, switch the mode selection switch to the ON position, the RUN indicator should be on. If the ERR indicator is on, the user program or the system is faulty. Loop up in the IV2/IVC1L series PLC Programming Manual and remove the fault.
  4. Power on the PLC external system to start system debugging

Routine Maintenance 

Do the following: 

  1. Ensure the PLC a clean environment. Protect it from aliens and  dust.
  2. Keep the ventilation and heat dissipation of PLC in good condition.
  3. Ensure that the cable connections are reliable and in good condition.


  1. Never connect the transistor output to an AC circuit (like 220Vac). The design of the output circuit must abide by the requirements of electric parameters, and no over-voltage or over-current is allowed.
  2. Use the relay contacts only when necessary, because the life span of relay contacts depends largely on its action times.
  3. The relay contacts can support loads smaller than 2A. To support larger loads, use external contacts or mid-relay.
  4. Note that the relay contact may fail to close when the current is smaller than 5mA.


  1. The warranty range is confined to the PLC only.
  2. Warranty period is 18 months, within which period INVT conducts free maintenance and repairing to the PLC that has any fault or damage under the normal operation conditions.
  3. The start time of warranty period is the delivery date of the product, of which the product SN is the sole basis of judgment. PLC without a product SN shall be regarded as out of warranty.
  4. Even within 18 months, maintenance will also be charged in the following situations:
    • Damages incurred to the PLC due to mis-operations, which are not in compliance with the User Manual;
    • Damages incurred to the PLC due to fire, flood, abnormal voltage, etc;
    • Damages incurred to the PLC due to the improper use of PLC functions.
  5. The service fee will be charged according to the actual costs. If there is any contract, the contract prevails.
  6. Please keep this paper and show this paper to the maintenance unit when the product needs to be repaired.
  7. If you have any question, please contact the distributor or our company directly.

Shenzhen INVT Electric Co., Ltd.
Address: INVT Guangming Technology Building, Songbai Road, Matian, Guangming District, Shenzhen, China
All rights reserved. The contents in this document are subject to change without notice.

Documents / Resources

invt IVC1L Series PLC [pdf] User Manual
IVC1L Series PLC, IVC1L Series, IVC1L PLC, IVC1L

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