PLC Boards and Control Units
Intelligent Search for Components
Search according to your product code, category of product or manufacturer and you will find your requested component fast and easy. Should you nevertheless not be able to trace the part you are looking for – our experts will gladly help you Tel: +49 8196 9000-110.
Your efficient Partner for the repair and distribution of PLC Boards and Control Units
For over 40 years now EICHLER stands for the leading Service provider for current and discontinued PLC Components covering most known manufacturers. The repair On Board will ensure a longer Life Cycle of Industrial Facilities and will reduce costs in view of having to migrate to newer systems. Apart from this EICHLER also can help by offering Sale, Distribution or procurement of used or brand new components. In the field of life cycle management, EICHLER offers sophisticated stock management concepts to ensure the long-term availability of industrial electronics
PLC Boards and Control Units - our range of services
Get to know our range of service in view of repair and distribution on PLC Boards and Control Units
- Service on a large variety of different manufacturers
- On Board Repair
- 24 Months Warranty
- Unique Testing Devices
- Emergency Repair
- Your own person of contact
Customer Comments
„…we would like to express our appreciation towards an absolutely top level Customer Service. Having been able to repair our Relanko-Modulator you helped to solve a very severe problem. For this we thank you very much once again. Due to the competence shown you have gained another steady customer. “
ppa. Niels Kollmorgen, AMC Pancke AG
PLC Boards and Control Units
CPU and Central Control Boards
Central control units are the core of every automated installation. These complex boards require an upmost level of both competence and know-how in order to restore these kind of units. EICHLER has - as part of their repair equipment – machinery such as steam driven soldering devices and robots in order to exchange special kinds of BGA processors.
Analog I/O Units
All I/O boards based on analog function are repaired or exchanged at EICHLER with the best routine and as fast as possible. Every board is fully tested before it leaves our works.
Function Modules
Function modules are designed to record data related to the status of positioning, scale and distance measuring. These units are often very special and require a large amount of know-how during the test-phase after the actual repair has been done.
Communication Units
These kind of PLC components ensure the exchange of data within the actual existing facility. During the repair it is essential to be able to fully test all relevant interfaces.
Digital I/O Units
All digital I/O boards are repaired or exchanged at EICHLER with the best routine and as fast as possible. Every board is fully tested before it leaves our works.
Power Units and Power Supplies
Power units are always subject to permanent work-load. EICHLER will always exchange the relevant wear parts. After repair all units are tested under realistic conditions and full capacity.
Quality management according to ISO 9001:2015
Certified workflow guarantees a consistently high quality of service when testing and repairing your component.
Nuclear Safety Committee 1401
As one of the first service providers, EICHLER is authorised to repair and sell automation and control technology in the nuclear sector.
Environmental management according to ISO 14001:2015
Standardized procedures for cleaning, repair and, if necessary, the disposal of components ensure a sustainable, environmentally sound use of resources.
PLC Boards and Control Units – Product Overview
In the following you will see a Product Overview showing On-Line available PLC Boards and Control Units. For further details to the individual module simply click to the article code. Alternatively refer to our Intelligent Search Mode or simply contact us by telephone: +49 8196 9000-110
Article Name | Article Description | Scope | Article Group Name | Manufacturer |
---|---|---|---|---|
6ES7214-1BG40-0XB0 | SIMATIC S7-1200, CPU 1214C, COMPACT CPU, AC/DC/RLY, ONBOARD I/O: 14 DI 24V DC; 10 DO RELAY 2A; 2 AI 0 - 10V DC, POWER SUPPLY: AC 85 - 264 V AC AT 47 - 63 HZ, PROGRAM/DATA MEMORY: 100 KB | PLC Controls | Central Processing Units | SIEMENS |
6ES7214-1HG40-0XB0 | SIMATIC S7-1200, CPU 1214C, COMPACT CPU, DC/DC/RELAY, ONBOARD I/O: 14 DI 24V DC; 10 DO RELAY 2A; 2 AI 0 - 10V DC, POWER SUPPLY: DC 20.4 - 28.8 V DC, PROGRAM/DATA MEMORY: 100 KB | PLC Controls | Central Processing Units | SIEMENS |
6ES7215-1AG40-0XB0 | SIMATIC S7-1200, CPU 1215C, COMPACT CPU, DC/DC/DC, 2 PROFINET PORT, ONBOARD I/O: 14 DI 24V DC; 10 DO 24V DC 0.5A 2 AI 0-10V DC, 2 AO 0-20MA DC, POWER SUPPLY: DC 20.4 - 28.8 V DC, PROGRAM/DATA MEMORY: 125 KB | PLC Controls | Central Processing Units | SIEMENS |
6ES7215-1BG40-0XB0 | SIMATIC S7-1200, CPU 1215C, COMPACT CPU, AC/DC/RELAY, 2 PROFINET PORT, ONBOARD I/O: 14 DI 24V DC; 10 DO RELAY 2A, 2 AI 0-10V DC, 2 AO 0-20MA DC, POWER SUPPLY: AC 85 - 264 V AC AT 47 - 63 HZ, PROGRAM/DATA MEMORY: 125 KB | PLC Controls | Central Processing Units | SIEMENS |
6ES7215-1HG40-0XB0 | SIMATIC S7-1200, CPU 1215C, COMPACT CPU, DC/DC/RELAY, 2 PROFINET PORT, ONBOARD I/O: 14 DI 24V DC; 10 DO RELAY 2A, 2 AI 0-10V DC, 2 AO 0-20MA DC, POWER SUPPLY: DC 20.4 - 28.8 V DC, PROGRAM/DATA MEMORY: 125 KB | PLC Controls | Central Processing Units | SIEMENS |
6ES7217-1AG40-0XB0 | SIMATIC S7-1200, CPU 1217C, COMPACT CPU, DC/DC/DC, 2 PROFINET PORT ONBOARD I/O: 10 DI 24V DC; 4 DI RS422/485; 6 DO 24V DC; 0,5A; 4 DO RS422/485; 2 AI 0- 10V DC, 2 AQ 0- 20MA; POWER SUPPLY: DC 20.4 - 28.8 V DC, PROGRAM/DATA MEMORY: 150 KB | PLC Controls | Central Processing Units | SIEMENS |
6ES7231-5PD32-0XB0 | SIMATIC S7-1200, ANALOG INPUT, SM 1231 RTD, 4 X AI RTD MODULE | PLC Controls | Analog Input / Output Modules | SIEMENS |
6ES7231-5PF32-0XB0 | SIMATIC S7-1200, ANALOG INPUT, SM 1231RTD, 8 X AI RTD MODULE, | PLC Controls | Analog Input / Output Modules | SIEMENS |
6ES7231-5QD32-0XB0 | SIMATIC S7-1200, ANALOG INPUT, SM 1231 TC, 4 AI THERMOCOUPLE | PLC Controls | Analog Input / Output Modules | SIEMENS |
6ES7231-5QF32-0XB0 | SIMATIC S7-1200, ANALOG INPUT, SM 1231 TC, 8 AI THERMOCOUPLE | PLC Controls | Analog Input / Output Modules | SIEMENS |
6ES7278-4BD32-0XB0 | SIMATIC S7-1200, SM1278 IO-LINK, 4 X IO-LINK MASTER | PLC Controls | Communication Modules | SIEMENS |
6ES7292-0AA55-0AA0 | SIMATIC S7-1200, EMS400S, IR-DU EXTERNAL IR SENSOR | PLC Controls | Function Modules | SIEMENS |
6ES7292-0EA50-0AA0 | SIMATIC S7-1200, EMS400S, EMS400S DIAGNOSIS UNIT | PLC Controls | Function Modules | SIEMENS |
6ES7292-1AG40-0XA1 | SIMATIC S7-1200, SPARE PART, I/O TERMINAL BLOCK TIN, KEYED LEFT, FOR DIGITAL SIGNAL MODULES 8CH/16CH (4 PIECES W. 7 SCREWS EACH) | PLC Controls | Connecting Systems / Cables | SIEMENS |
6ES7292-1AH40-0XA0 | SIMATIC S7-1200, SPARE PART, I/O TERMINAL BLOCK TIN, KEYED RIGHT, CPU1211C/1212C BOTTOM CONNECTOR (4 PIECES W. 8 SCREWS EACH) | PLC Controls | Connecting Systems / Cables | SIEMENS |
6ES7292-1AK30-0XA0 | SIMATIC S7-1200, SPARE PART I/O TERMINAL BLOCK TIN CPU 1217C TOP CONNECTOR (4 PIECES W. 10 SCREWS EACH) | PLC Controls | Connecting Systems / Cables | SIEMENS |
6ES7292-1AL40-0XA0 | SIMATIC S7-1200, SPARE PART, I/O TERMINAL BLOCK TIN, KEYED RIGHT, DIGITAL SIGNAL MODUL 32CH, (4 PIECES W. 11 SCREWS EACH) | PLC Controls | Connecting Systems / Cables | SIEMENS |
6ES7292-1AM40-0XA0 | SIMATIC S7-1200, SPARE PART, I/O TERMINAL BLOCK TIN, KEYED RIGHT, CPU1214C/1215C BOTTOM CONNECTOR (4 PIECES W. 12 SCREWS EACH) | PLC Controls | Connecting Systems / Cables | SIEMENS |
6ES7292-1AP40-0XA0 | SIMATIC S7-1200, SPARE PART, I/O TERMINAL BLOCK TIN, KEYED RIGHT, CPU1211C/1212C TOP CONNECTOR, (4 PIECES W. 14 SCREWS EACH) | PLC Controls | Connecting Systems / Cables | SIEMENS |
6ES7292-1AR30-0XA0 | SIMATIC S7-1200, SPARE PART I/O TERMINAL BLOCK TIN CPU 1217C TOP CONNECTOR (4 PIECES W. 16 SCREWS EACH) | PLC Controls | Connecting Systems / Cables | SIEMENS |
6ES7292-1AT30-0XA0 | SIMATIC S7-1200, SPARE PART I/O TERMINAL BLOCK TIN CPU 1217C BOTTOM CONNECTOR (4 PIECES W. 18SCREWS EACH) | PLC Controls | Connecting Systems / Cables | SIEMENS |
6ES7292-1AV40-0XA0 | SIMATIC S7-1200, SPARE PART, I/O TERMINAL BLOCK TIN, KEYED RIGHT, CPU 1214C/1215C TOP CONNECTOR, (4 PIECES W. 20 SCREWS EACH) | PLC Controls | Connecting Systems / Cables | SIEMENS |
6ES7326-1RF01-0AB0 | SIMATIC S7, DIGITAL INPUT SM 326, 8 DI; 24 V DC, NAMUR, FAIL-SAFE NAMUR INPUT FOR SIMATIC S7 F-SYSTEMS, UP TO CATEGORY 4 (EN 954-1)/ SIL3 (IEC61508)/PLE (ISO13849), 1X 40-POLE | PLC Controls | Digital Input / Output Modules | SIEMENS |
6ES7450-1AP01-0AE0 | SIMATIC S7-400, FUNCTION MODULE FM 450-1 FOR COUNTER FUNCTION WITH 2 CHANNELS INCL. CONFIGURATION PACKAGE ON CD | PLC Controls | Function Modules | SIEMENS |
6ES7510-1DJ00-0AB0 | SIMATIC DP, CPU 1510SP-1 PN FOR ET 200SP, CENTRAL PROCESSING UNIT WITH WORKING MEMORY 100 KB FOR PROGRAM AND 750 KB FOR DATA, 1. INTERFACE, PROFINET IRT WITH 3 PORT SWITCH, 72 NS BIT-PERFORMANCE, SIMATIC MEMORY CARD NECESSARY | PLC Controls | Central Processing Units | SIEMENS |
6ES7511-1AK01-4YB5 | SIMATIC S7-1500, STARTERKIT, CONSISTIG OF: CPU 1511-1 PN, DI 16X24VDC HF, DQ 16X24VDC/0.5A ST, POWER SUPPLY PM1507, 24V/3A, MOUNTING RAIL 160MM, SIMATIC MEMORY CARD, 4 MB, FRONTCONNECTOR, ETHERNET CABLE. STEP 7 V13 PROFESSIONAL TRIAL365-LICENSE, INFO MATERIAL, IN SYSTAINER | PLC Controls | PLC Control Bundles | SIEMENS |
6ES7512-1DK00-0AB0 | SIMATIC DP, CPU 1512SP-1 PN FOR ET 200SP, CENTRAL PROCESSING UNIT WITH WORKING MEMORY 200 KB FOR PROGRAM AND 1 MB FOR DATA, 1. INTERFACE, PROFINET IRT WITH 3 PORT SWITCH, 48 NS BIT-PERFORMANCE, SIMATIC MEMORY CARD NECESSARY | PLC Controls | Central Processing Units | SIEMENS |
6ES7515-2AM00-0AB0 | SIMATIC S7-1500, CPU 1515-2 PN, CENTRAL PROCESSING UNIT WITH WORKING MEMORY 500 KB FOR PROGRAM AND 3 MB FOR DATA, 1. INTERFACE, PROFINET IRT WITH 2 PORT SWITCH, 2. INTERFACE, ETHERNET, 30 NS BIT-PERFORMANCE, SIMATIC MEMORY CARD NECESSARY | PLC Controls | Central Processing Units | SIEMENS |
6ES7515-2FM00-0AB0 | SIMATIC S7-1500F, CPU 1515F-2 PN, CENTRAL PROCESSING UNIT WITH WORKING MEMORY 750 KB FOR PROGRAM AND 3 MB FOR DATA, 1. INTERFACE, PROFINET IRT WITH 2 PORT SWITCH, 2. INTERFACE, ETHERNET, 30 NS BIT-PERFORMANCE, SIMATIC MEMORY CARD NECESSARY | PLC Controls | Central Processing Units | SIEMENS |
6ES7516-3FN00-0AB0 | SIMATIC S7-1500F, CPU 1516F-3 PN/DP, CENTRAL PROCESSING UNIT WITH WORKING MEMORY 1,5 MB FOR PROGRAM AND 5 MB FOR DATA, 1. INTERFACE, PROFINET IRT WITH 2 PORT SWITCH, 2. INTERFACE, ETHERNET, 3. INTERFACE, PROFIBUS, 10 NS BIT-PERFORMANCE, SIMATIC MEMORY CARD NECESSARY | PLC Controls | Central Processing Units | SIEMENS |
6ES7517-3AP00-0AB0 | SIMATIC S7-1500, CPU 1517-3 PN/DP, CENTRAL PROCESSING UNIT WITH WORKING MEMORY 2 MB FOR PROGRAM AND 8 MB FOR DATA, 1. INTERFACE: PROFINET IRT WITH 2 PORT SWITCH, 2. INTERFACE: PROFINET RT, 3. INTERFACE: PROFIBUS, 2 NS BIT-PERFORMANCE, SIMATIC MEMORY CARD NECESSARY | PLC Controls | Central Processing Units | SIEMENS |
6ES7517-3FP00-0AB0 | SIMATIC S7-1500F, CPU 1517F-3 PN/DP, CENTRAL PROCESSING UNIT WITH WORKING MEMORY 3 MB FOR PROGRAM AND 8 MB FOR DATA, 1. INTERFACE: PROFINET IRT WITH 2 PORT SWITCH, 2. INTERFACE: PROFINET RT, 3. INTERFACE: PROFIBUS, 2 NS BIT-PERFORMANCE, SIMATIC MEMORY CARD NECESSARY | PLC Controls | Central Processing Units | SIEMENS |
6ES7518-4AP00-0AB0 | SIMATIC S7-1500, CPU 1518-4 PN/DP, CENTRAL PROCESSING UNIT WITH WORKING MEMORY 4 MB FOR PROGRAM AND 20 MB FOR DATA, 1. INTERFACE: PROFINET IRT WITH 2 PORT SWITCH, 2. INTERFACE: PROFINET RT, 3. INTERFACE: ETHERNET, 4. INTERFACE: PROFIBUS, 1 NS BIT-PERFORMANCE, SIMATIC MEMORY CARD NECESSARY | PLC Controls | Central Processing Units | SIEMENS |
6ES7518-4FP00-0AB0 | SIMATIC S7-1500F, CPU 1518F-4 PN/DP, CENTRAL PROCESSING UNIT WITH WORKING MEMORY 6 MB FOR PROGRAM AND 20 MB FOR DATA, 1. INTERFACE: PROFINET IRT WITH 2 PORT SWITCH, 2. INTERFACE: PROFINET RT, 3. INTERFACE: ETHERNET, 4. INTERFACE: PROFIBUS, 1 NS BIT-PERFORMANCE, SIMATIC MEMORY CARD NECESSARY | PLC Controls | Central Processing Units | SIEMENS |
6ES7521-1BH10-0AA0 | SIMATIC S7-1500, DIGITAL INPUT MODULE, DI 16XDC 24V BA, 16 CHANNELS IN GROUPS OF 16; INPUT DELAY TYP. 3.2MS; INPUT TYPE 3 (IEC 61131) INCL. FRONT CONNECTOR PUSH-IN | PLC Controls | Digital Input / Output Modules | SIEMENS |
6ES7521-1BL10-0AA0 | SIMATIC S7-1500, DIGITAL INPUT MODULE, DI 32XDC 24V BA, 32 CHANNELS IN GROUPS OF 16; INPUT DELAY TYP. 3.2MS; INPUT TYPE 3 (IEC 61131) INCL. FRONT CONNECTOR PUSH-IN | PLC Controls | Digital Input / Output Modules | SIEMENS |
6ES7522-1BH10-0AA0 | SIMATIC S7-1500, DIGITAL OUTPUT MODULE, DQ 16 X 24VDC/0.5A BA; 16 CHANNELS IN GROUPS OF 8, 4 A PER GROUP; INCL. FRONT CONNECTOR PUSH-IN | PLC Controls | Digital Input / Output Modules | SIEMENS |
6ES7522-1BL10-0AA0 | SIMATIC S7-1500, DIGITAL OUTPUT MODULE, DQ 32 X 24VDC/0.5A BA; 32 CHANNELS IN GROUPS OF 8, 4 A PER GROUP; INCL. FRONT CONNECTOR PUSH-IN | PLC Controls | Digital Input / Output Modules | SIEMENS |
6ES7523-1BL00-0AA0 | SIMATIC S7-1500 DIGITAL IN-/OUTPUT MODULE, DI16X 24VDC BA, 16 CHANNELS IN GROUPS OF 16, INPUT DELAY TYP. 3.2MS; INPUT TYPE 3 (IEC 61131), DQ 16X24VDC/0.5A BA; 16 CHANNELS IN GROUPS OF 8; 4A PER GROUP INCL. FRONT CONNECTOR PUSH-IN | PLC Controls | Digital Input / Output Modules | SIEMENS |
6ES7531-7QD00-0AB0 | SIMATIC S7-1500, ANALOG INPUT MODULE AI 4 X U/I/RTD/TC ST, 16 BITS OF RESOLUTION, ACCURACY 0.3 %; 4 CHANNELS IN GROUPS OF 4; 2 CHANNNELS FOR RTD MEASURING, COMMON MODE VOLTAGE APPR. 10 V; DIAGNOSIS, PROCESSALARMS INCL. FRONT CONNECTOR PUSH-IN, FEEDING ELEMENT, SHIELDING ELEMENT, SHIELDING CLAMP | PLC Controls | Analog Input / Output Modules | SIEMENS |
6ES7532-5NB00-0AB0 | SIMATIC S7-1500, ANALOG OUTPUT MODULE AQ 2 X U/I ST, 16 BITS OF RESOLUTION, ACCURACY 0.3 %. 2 CHANNELS IN GROUPS OF 2, DIAGNOSIS, SUBSTITUTE VALUE INCL. FRONT CONNECTOR PUSH-IN, FEEDING ELEM., SHIELDING ELEM., SHIELDING CLAMP | PLC Controls | Analog Input / Output Modules | SIEMENS |
6ES7534-7QE00-0AB0 | SIMATIC S7-1500, ANALOG IN-/OUTPUT MODULE AI 4X U/I/R/RTD/TC ST; 4 CHANNELS IN GROUPS OF 4 PROCESSALARMS; DIAGNOSTICS AQ 2X U/I ST; 2 CHANNELS IN GROUPS OF 2; SUBSTITUTE VALUE; DIAGNOSTICS; COMMON-MODE-VOLTAGE APPR. 10V; 16BIT; ACCURACY 0.3% INCL. FRONT CONNECTOR PUSH IN, FEEDING ELEMENT, SHIELDING ELE- MENT, SHIELDING CLAMP | PLC Controls | Analog Input / Output Modules | SIEMENS |
6ES7545-5DA00-0AB0 | SIMATIC DP, CM PROFIBUS DP FOR ET 200SP CPU MODULE WITH PROFIBUS DP INTERF. (9 PIN SUB-D, FEMALE) DP-MASTER FOR 125 DP-SLAVES | PLC Controls | Communication Modules | SIEMENS |
6ES7551-1AB00-0AB0 | SIMATIC S7-1500, TM POSINPUT 2 COUNTING AND POSITON DETECTION MODULE, FOR RS422 INCREMENTAL ENCODER OR SSI ABSOLUTE ENCODER, 2 CHANNELS, 2DI,2DQ PER CHANNEL | PLC Controls | Function Modules | SIEMENS |
6ES7592-1BM00-0XA0 | SIMATIC S7-1500, FRONTCONNECTOR PUSH-IN TYPE; 40PIN, FOR 25MM WIDE S7-1500 MODULES AND COMPACT CPU, INCL. CABLE STRAP | PLC Controls | Connecting Systems / Cables | SIEMENS |
6ES7592-1BM00-0XB0 | SIMATIC S7-1500, FRONTCONNECTOR PUSH-IN TYPE, 40PIN, FOR 35MM WIDE MODULES INCL. 4 JUMPERS AND CABLE STRAP | PLC Controls | Connecting Systems / Cables | SIEMENS |
6ES7654-5CJ00-0XF0 | SIMATIC PCS 7 CPU 410-5H BUNDLE PO 100, CPU 410-5H PROCESS AUTOMATION FOR S7-400 AND S7-400H/F/FH, WITH SYSTEM EXPANSION CARD UP TO 100 PROCESS OBJECTS | PLC Controls | PLC Control Bundles | SIEMENS |
6ES7654-5CL00-0XF0 | SIMATIC PCS 7 CPU 410-5H BUNDLE PO 500, CPU 410-5H PROCESS AUTOMATION FOR S7-400 AND S7-400H/F/FH, WITH SYSTEM EXPANSION CARD UP TO 500 PROCESS OBJECTS | PLC Controls | PLC Control Bundles | SIEMENS |
6ES7654-5CN00-0XF0 | SIMATIC PCS 7 CPU 410-5H BUNDLE PO 1000, CPU 410-5H PROCESS AUTOMATION FOR S7-400 AND S7-400H/F/FH, WITH SYSTEM EXPANSION CARD UP TO 1000 PROCESS OBJECTS | PLC Controls | PLC Control Bundles | SIEMENS |
6ES7654-5CP00-0XF0 | SIMATIC PCS 7 CPU 410-5H BUNDLE PO 1600, CPU 410-5H PROCESS AUTOMATION FOR S7-400 AND S7-400H/F/FH, WITH SYSTEM EXPANSION CARD UP TO 1600 PROCESS OBJECTS | PLC Controls | PLC Control Bundles | SIEMENS |
We service the repair for a very large scale on different manufacturers of mobile automation equipment
For now over 40 years EICHLER has built up an unique knowledge and experience in repair and distribution of PLC components, HMI operation units and drives and driving automation modules. We service the repair and offer the distribution on a very large scale on different manufacturers of mobile automation equipment such as HMI operating systems, PLC Modules and controlling units together with components on driving automation and motors.
- Large scale on repairs for currently relevant or discontinued components
- On-Board repairs based on specific repairs according to the actual damage
- Unique testing equipment will ensure to detect even very unusual failures
- Realistic trials under full capacity will guarantee you the necessary function.
- 24 months warranty for the repair serviced
Convince yourself on the quality of repair EICHLER offers. Simply download the delivery note, fill out the form and send us the part in question.
Unique Testing Devices for PLC Boards and Control Units
Our testing equipment for PLC Boards and Control Units is exceptional. Thorough checking of the incoming modules with the help of fully automated Test Stands enable us to detect even very sporadic problems with no apparent cause applying to PLC Boards and Control Units. Final tests on function and the use of trial runs under full capacity ensure the function of repaired und used PLC Components
- More than 40 years of experience in designing and building testing equipment
- Our testing equipment is built for a large variety of different manufacturers for PLC Boards and Control Units
- The automated testing of certain parameters ensure the actual function.
- 24 months warranty for the repair serviced of the items purchased
Your Direct Line to EICHLER GmbH
Emergency-Hotline - Machine Breakdown
24/7 Spare Parts Service
Service-Hotline - Sales, Maintenance Contracts and Repairs
Technical Trainings - Information & Booking
Life Cycle Management - Information & Appointments
Purchase of Overstockings