General Terms and Conditions

The following listed electronic specifications as well as the enclosed guidelines for PLC controllers S7 must be complied with for any deliveries of control cabinets.
If any variations are found to be necessary, these must be approved in writing by JRS.

With variations/alternations which are not approved in writing, we reserve the right to refuse delivery of the plant until the problem is eliminated.

For information or questions, please contact Mr Markus Hauber

(Tel. +49 (0) 7967 / 152 – 253)

(Fax +49 (0) 7967 / 152 – 248)

Electric circuit diagrams:

Electric circuit diagrams should be made using the system “SIEMENS Sigraph ET 7.0“, Autocad or Eplan.
All data must be transferred to CD data media.
Alternatively autocad-compatible DXF data or PDF data can also be delivered.
The entire electric circuit diagram documents must be supplied in the German language on A4 size sheets as well as on CD data media.

Electric parts:

Control cabinet wiring:

• Control cabinets, as well as electronic parts, must meet the current valid VDE (Verband Deutscher Elektrotechniker [Association of German Electricians]) and DIN [German national standards institution] specifications.
• Special attention must be given to the specifications for “flammable operating facilities” (protective system at least IP54)
• In the control cabinets, a reserve space of at least 25% must be provided.
• Control cabinets are operated at ambient temperatures of up to 10 °C below zero; accordingly, a regulated control cabinet heater must be provided.

Drives:

• All drives must at least meet the insulation category “F”.
• One PTC thermistor loop (150 °C) and one PT100 is to be provided for all drives from 7.5kw for the coil temperature.
• Motors having 11kw or more should be operational with a voltage of 690V.
• Additionally with drives having 55kw or more, monitoring of storage area A and storage area B using a PT100 sensor is required (Storage area A = drive end and B = venting end).
• The motor monitoring must be available in a separate connection box on the motor.
  The PT100 sensor is converted into a 4-20mA signal using a converter.
• Drives that are operated with a frequency converter must always be equipped with one PTC thermistor loop and must be “convertible”. If the drive is operated at less than 25 Hz, a separately-driven fan is required. Anti-interference level B must be maintained!

Sensors:

• Conveyor belts must be equipped with either contact rollers with inductive proximity switches or with optical sensors (no light barrier sensors).
• If, for technical reasons, a light barrier sensor must be used, this must be provided with a stable, mechanical cover/guard.
  

Type of controller according to application (Siemens):

• S7-200 (may not be used)
• S7-300 (use only with CPU 312C, 313C, 314C 2DP, 315-2DP, 316-2DP, 318-2DP)
• S7-400 (with CPU412-2DP, 413-2DP, 414-2DP, 416-2DP)

Only memory cards with 5V operating voltage may be used.

Operating and observing (Siemens)

• TD17, OP 7 ,OP17, OP27, TP17, TP27,
  Programming with Siemens Protool from V6.x, all data must be included with delivery.

Programming guidelines:

• The data name for every program must be coordinated with JRS and retained for changes.
• Step7 (or others if 100% Step7-compatible e.g. IBH Softec S7 for Windows), and the entire guidelines for Step7 must be complied with. (feasibility AWL –FUP, KOP)
• Program must be stored and delivered in entirety on CD data storage media.
  ZIP archives can also be created using Step7.
• Program must be delivered with detailed, German documentation (network commentary, footnotes as well as cross-reference listings and hardware configurations, GSD data etc.). Programs in other languages must be translated into German. (including text indicators, OP’s etc.)
• Total program may not have password protection or other encryption or encoding (extractability/readability of all blocks).
• Program must be safeguarded against power outages in the CPU.
• All operands (local and global) must be listed in the symbolism data with symbol names (without umlauts max.24 characters) and commentaries (max. 80 characters).
• Data words, data bytes, data double words etc. must be documented in the corresponding data block in the variable table with name and commentary.
• With instance data blocks the same number must be assigned e.g. FC100 -> DI 100 (can be different depending on the CPU).
• Function blocks must be programmed with local data only and documented correspondingly. Each FC must be allocated a description, library number, name, family, author and version.
• All states that lead to production or program interruptions or shutting off of the machine must be displayed exactly defined so that an disruption solution can be effected without requiring a programming device (e.g. text indicator “switch Sxx.x not stuck“)
• There must be a logical manual control available in order to bring the machine back to the starting position.
• Machinery components (e.g. drives) and the corresponding sensors must be integrally programmed in a block. Example: FB1 network 1-10 for the 1st motor, network 11-10 for the 2nd motor. In addition, the blocks should not be too long.

For the delivery of machines which are powered with pneumatic or hydraulic components, the following listed specifications must be complied with.

If any variations are found to be necessary, these must be approved in writing by JRS.

For information or questions, please contact
Mr Otto Dolzer +49 (0)7967/152-483
otto.dolzer@jrs.de .

Pneumatic:

The operating pressure for Rettenmaier is 5.2 bars. This must be taken into account when designing your pneumatic components. We do not allow the use of boosters to increase the compressed air.

Only products from the Festo Company may be used.

Hoses: PUN / gray-blue

Connections: Quickstar connections

Cylinder:

All cylinders must be equipped with pneumatic end-dampering (PPV) and end scanning ( A ).

Preferred type: DNCB...PPV-A DIN ISO 6431

Position scanning with integrated electronic cylinder switches.

Hydraulic:

During the bidding, the hydraulic diagrams as well as a development plan for the hydraulic aggregates must be made available to us.

Included there must also be detailed circuit diagrams as well as parts lists with mention of the delivery deadlines (binding). With the hydraulic plan, a cross diagram must also be provided. This must be in during the bidding phase before the placement of order.

Only products from the following manufacturers may be used:

a) Bosch b) Hydropa

Only cylinders from the Hunger Company may be used. The service ports on the cylinders must be equipped with pressure gauge connections. Possible position sensors may only be used after consultation with JRS. Cylinders must be end-dampered. 

Oil containers:

In addition to the nominal volumes, an air cushion of at least 10 – 15 % must be provided.

Suction and return pipes should be as far apart as possible. Both systems must terminate far below the lowest possible oil level. The distance from the floor is 2 – 3 times the pipe diameter.
In the container, an inspection glass with temperature indicator must be installed.
The suction and return areas should be separated by a baffle and moderating plate which lies directly on the floor and reaches to the height of the oil level.

Filtering:

The suction and return areas must be equipped with quick couplers for the installation of an external filter.

All aggregates must be equipped with filters in the pressure and return lines. Cooling and return filtering must be operated using separate pumps.

The filter unit must have a return flow range between 10 and 25 µm. However, the filter mesh size must be able to be so finely adjusted by the manufacturer that the greatest possible protective oil purity is obtained for the plant.

Level – temperature switch type KFS (Woerner).
Optimally there should be an allowance for the possible addition of a cooling and heating unit.

Pipes in 37.4 yellow chromated steel, all pipes must be fitted with measurement ports (so that the course of pressure of the individual actuators can be measured).

Bag filters:

Where there are flexible connections, from valves to the nozzle of the clean air room, a sheet metal jacket must be installed to stabilize the rubber sleeve. To affix this sleeve only hose clips of the following company are acceptable:

Würth Company
Type PEBRA,
Diameter 50 – 70,
Art.-No. 5475070

The nozzle pipes must stand exactly centrical above the center of the venturi injectors. The minimum distance (axle distance from valve to valve) must be at least 160 mm.

Only ASCO type: SCXG 353 AO47 filter cleaning valves can be used. The filter cleaning valves must be mounted; otherwise they will not be accepted.

Cleaning valves must be delivered in their entirety. Welding beads as well as zinc pest residue must be flushed out of the boiler before the valve lids and membranes are mounted.

The pre-assembled pressure parts of the filter must be tested at 8 bars for water tightness. Should filters be faulty in any way, such defects will be repaired or eliminated at the manufacturer's expense for a period of two years from the delivery date. The current guidelines for pressure tanks should be observed (e.g. GSG).

Cleaning valves may only be sealed with hemp; Teflon tape may not be used. 

Each pressure tank must be fitted with a label showing the manufacturer, permissible operating parameters, volume and year of construction.

Each filter must be fitted with a label showing the manufacturer, permissible operating parameters, volume and year of construction.

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J. RETTENMAIER & SÖHNE GmbH + Co. KG

73494 Rosenberg (Germany)
Telefon: +49 (0) 79 67 - 152 - 0
Telefax: +49 (0) 79 67 - 152 - 222
E-Mail: info@jrs.de
Internet: www.jrs.de