Product Description of B&R 7DI135.70 Interface Module
1. Product Definition Overview
7DI135.70 is a multifunctional slave interface module under B&R System 2003 PCC platform, fully manufactured in Austria. It integrates digital signal input and high-speed pulse counting interface functions, belonging to field signal acquisition slave expansion units, not master CPU. It collects external switching signals and encoder pulse signals, transmits processed data to rack 7CP series master CPU through System 2003 backplane bus, all logic, position and speed calculation rely entirely on the upper CPU. The whole System 2003 platform has been discontinued by B&R; available stock includes original imported new surplus and rigorously tested refurbished spare modules for legacy equipment maintenance and retrofit transformation. The module has CE, UL/cULus industrial safety certifications, built-in EMC filter circuits to suppress interference from servo drives, inverters and contactors inside control cabinets. Authentic imported products are matched with factory test reports, Austrian origin certificates and complete import customs documents.
2. Mechanical Structure & Backplane DIN Rail Installation
Adopts unified plug-in mechanical dimensions for System 2003 series, compatible with all 7BP DIN rail backplanes (7BP701.1, 7BP702.0, 7BP703.0, 7BP704.0, 7BP707.0, 7BP708.0, 7BP709.0). It is a slave device and can only be installed in idle slave slots behind the first CPU master slot, cannot occupy the CPU master installation position.
An integrated elastic snap lock at the module bottom realizes quick fixing on standard 35 mm DIN rails; after fully horizontal insertion until the front panel is level with the backplane surface, press the snap lock down to lock firmly, no extra fixed brackets needed. The outer shell is flame-retardant reinforced industrial plastic produced according to Austrian standards, with excellent impact resistance and long-term anti-aging performance for long-time sealed cabinet operation. Protection class IP20, only applicable to closed indoor electrical cabinets; open air, liquid splashing, oil mist and heavy dust environments are prohibited.
Multi-color LED indicators are arranged on the front panel to display real-time status: module power supply, backplane bus communication state, each digital input channel status, counter channel running state and overall module fault alarm. Permanent laser marking on the casing contains B&R brand logo, complete part number 7DI135.70, hardware revision, unique factory serial number and “Made in Austria” origin mark for full supply chain traceability and genuine product verification. The mechanical structure passes EN 60068-2-6 vibration and shock resistance tests at B&R Austrian factory.
3. Electrical Performance & Power Supply Parameters
Backplane Logic Power
Internal control logic power is 24 V DC, supplied by backplane internal power bus, allowable voltage fluctuation range 18 V DC ~ 30 V DC. Low power consumption will not increase extra load on System 2003 rack dedicated power supply. No built-in backup battery; system clock and overall task scheduling are uniformly managed by rack master CPU.
Field Interface Circuit Electrical Index
Digital input interface: Standard 24 V DC NPN/PNP universal digital input, used for limit switches, safety doors, photoelectric sensors, proximity switches and other switching signal collection; each DI channel has independent overvoltage, reverse connection and short-circuit protection.
High-speed counter interface: Supports single-ended/differential A/B/Z phase incremental encoder pulse input, adapts to 24 V encoder power supply, completes hardware pulse counting, filtering and zero-position capture inside the module.
Full galvanic isolation is designed between internal backplane control circuit and external field signal interface circuit, effectively isolating ground loop interference in densely arranged multi-servo cabinets. Multi-layer protection circuits such as overvoltage, overcurrent and ESD electrostatic protection are embedded to prevent module damage caused by field wiring errors and surge voltage. All backplane plug gold-plated pins ensure stable conduction and oxidation resistance under long-term vibration working conditions. Every imported module passes full channel signal test, counting accuracy calibration and 72-hour continuous aging burn-in test before leaving Austria.
4. Internal & External Interface Composition
Rear Backplane Internal Interface
Gold-plated integrated bus connector at the rear of the module, exclusively connected to System 2003 proprietary backplane bus. Function: Receive configuration parameters (count mode, filter time, DI trigger threshold) issued by 7CP master CPU; upload real-time counter values, digital input status, channel fault codes to the CPU. It is the only data interaction channel between this interface module and the rack control system.
Front Panel Field External Interface Terminals
Front screw terminal block is divided into two independent interface areas:
Digital input signal terminals: Independent DI channel terminals, matched with public 24V/GND power terminals for switching sensor wiring;
Encoder counter terminals: A phase, B phase, Z zero phase, encoder power supply and ground terminals for incremental encoder connection.
This module has no analog input/output terminals, no digital output drive ports and no independent external fieldbus communication ports; its core positioning is field digital signal + encoder pulse signal acquisition interface conversion unit.
Complete Signal Transmission Flow
External field switching signals and encoder pulse signals access front interface terminals;
Module completes signal isolation, hardware filtering, DI level judgment and pulse counting;
Processed digital state data and count values are uploaded to master CPU via backplane bus;
CPU executes position closed-loop calculation, speed operation, safety interlock logic and motion scheduling according to uploaded data;
Once channel short circuit, open circuit or signal overvoltage fault occurs, the module uploads fault codes to CPU and lights the corresponding fault LED on the front panel.
5. Core Interface Module Functional Characteristics
Dual interface integration: Simultaneously provide digital input acquisition and high-speed encoder counting interface access, one module realizes two types of field signal access;
Channel independent protection: Single DI or counter channel fault only affects itself, will not lead to the whole module offline;
Configurable signal filter parameters, can suppress pulse burr and long wiring interference noise through Automation Studio software setting;
Hardware zero-position capture by Z phase or external DI trigger, support software reset instructions issued by CPU;
Synchronized data refresh cycle matched with System 2003 backplane bus, coordinate perfectly with CPU’s ACOPOS servo motion control cycle;
No independent operation, arithmetic or logic operation ability; all interface working modes, parameters and data processing are uniformly configured and controlled by upper master CPU through B&R Automation Studio programming software.
6. Environmental Application Conditions
Continuous working ambient temperature: 0 ℃ ~ +60 ℃
Storage and transportation temperature: -25 ℃ ~ +70 ℃, exported from Austria with anti-static shockproof packaging
Ambient humidity: 5% ~ 95%, no condensation allowed
Forbidden application environments: Places with corrosive chemical gas, long-term high humidity, heavy dust, liquid splashing and flammable explosive media; harsh workshop sites must be equipped with fully sealed ventilated control cabinets with heat dissipation fans
Wiring specification: Encoder pulse lines must adopt shielded twisted-pair cables with reliable shielding layer grounding to guarantee counting precision and anti-interference stability; ordinary digital input signals can use standard twisted signal wires.
7. Compatible System 2003 Hardware Matching System
Matched Master CPU Controllers
All full-series 7CP System 2003 master CPUs: 7CP476 series, 7CP770 series, 7CP774 series and other rack master control units.
Matched Auxiliary Supporting Hardware
All models of 7BP DIN rail backplanes;
7AC020.9 blank slot baffles for unused slave expansion positions;
Special 24 V DC rack power supply for System 2003 platform;
Supporting shielded encoder cables, DI signal wires and terminal wiring accessories.
Incompatible Equipment Platforms
Mechanically and electrically incompatible with B&R later-generation X20, X67, APC platforms, as well as third-party brand PLC backplane systems and non-original B&R servo systems. All empty slave slots must be covered with 7AC020.9 baffles to stabilize backplane bus impedance, prevent dust and metal debris from corroding contact pins, and avoid signal reflection which reduces bus communication stability between CPU and interface modules. Authentic imported complete sets are equipped with full customs clearance documents, factory inspection test reports and official Austrian origin certification.
8. Typical Industrial Application Scenarios
Plastic injection molding machines: Screw encoder pulse interface for injection speed/displacement collection, mold limit digital input interface;
Packaging and filling production lines: Conveyor distance encoder counting interface, product photoelectric detection DI interface, cutting positioning signal access;
Textile winding and drying equipment: Spindle speed encoder interface, yarn breakage sensor digital input, winding homing position signal;
CNC lathes, milling machines and machining centers: X/Y/Z axis position encoder interface, stroke limit DI, tool detection switch signal access;
Automated assembly lines: Press depth measurement encoder interface, workpiece presence DI, clamping limit switching signal;
Material conveyors, water treatment equipment: Flowmeter pulse counting interface, pump operation feedback DI, safety protection door interlock input.
It is widely used as original imported replacement interface module for aging System 2003 production lines, with strong backward compatibility for original rack layout; after replacement, only interface address and counting mode parameters need to be set in Automation Studio, no need to rewrite the main control motion and interlock logic program.
9. Import Quality Assurance, Installation and Maintenance Specifications
Every genuine original imported 7DI135.70 interface module has an independent factory serial number permanently stored in B&R Austrian production database for full supply chain traceability and authenticity inspection. Refurbished spare interface modules undergo multi-stage strict pre-delivery testing at B&R authorized European service institutions: backplane plug vibration cycle test, voltage fluctuation aging test, counting precision calibration, channel short-circuit protection verification, front panel LED function inspection and 72-hour continuous burn-in test under high electromagnetic interference simulation environment. Qualified new and refurbished modules enjoy standard supplier warranty for 12–24 months, supported by original B&R factory quality records.
Standard On-site Installation and Commissioning Steps
Firmly install imported 7BP System 2003 backplane on 35 mm DIN rail inside the cabinet, install 7CP master CPU in the first master slot and lock the snap buckle;
Insert 7DI135.70 interface module into any idle slave slot behind the CPU, fasten the bottom elastic snap lock;
Wire encoder and digital input signals to front terminals as required, encoder lines use shielded twisted-pair and do standardized shielding grounding;
Power on the rack 24 V power supply, confirm module power LED is normally on without initial fault alarm;
Connect PC installed with licensed B&R Automation Studio software to CPU programming port through official download cable;
Enter hardware configuration page to add 7DI135.70 module, set counter operating mode, signal filter time, DI address mapping and trigger parameters;
Compile the complete control project and download it into master CPU non-volatile memory;
Switch CPU from STOP to RUN mode, manually test encoder rotation and DI switch triggering, check that count values and digital input status update normally in software diagnosis window without fault codes.
Maintenance Forbidden Operations
Unauthorized disassembly of module PCB board, replacement of internal chips or modification of on-board circuits will directly invalidate the warranty, and may cause backplane bus breakdown, counting data deviation, servo positioning out of tolerance and machine collision risks.
Spare backup imported 7DI135.70 interface modules need long-term storage in dry, constant temperature and low humidity warehouses, stored in original anti-static export packaging to avoid pin oxidation and internal circuit moisture damage during idle period.
When replacing faulty modules on running production equipment: First cut off rack 24 V power supply, fully back up CPU complete project program in advance; install mechanically and bus-compatible imported replacement interface module, reconfigure counting and DI parameters in software, complete full signal linkage test before restarting automatic production operation.
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