The interface components are available as a clear alternative to the point-to-point wiring system in order to reduce costs and to simplify the setup of the electrical cabinets. The main function of this interface is as an adapter between the control devices and field elements. The interfaces consist of:
Standard connectors for connection to the control devices.
PCB terminals with tension clamp or screw connections for the field connection.
Additional components like LEDs, fuses, relays or isolators which can integrate new functions.
Profiles and base frames for attaching to standard TS32 and TS35 mounting rails. The pre-assembled cables supplied by Weidmüller are also used to connect the tester with the interface. These are the advantages of the system:
The conventional point-to-point cabling between the PLC and the field elements is very expensive during the installation and initial commissioning. The risk of mistakes also increases proportionally to the number of cables used. You need much space in the electrical cabinet and too much time for the creation of wiring plans and drawings. The group of PLC interfaces and pre-assembled cables solve all of these problems.
The new interfaces and pre-wired cables from Weidmüller allow connecting the Honeywell C300 input/output cards to the field components in a manner that is simple, fast and error free.
The IOTAs (Input Output terminal Assemblies) have been designed using PCB connectors manufactured by Weidmüller. These PCB connectors allow the user the flexibility of entering the field using point to point wiring or by means of a pre-wired cable in conjunction with Weidmüller’s FTAs.
The use of Weidmüller interfaces in control cabinets enables clear and simple connections between the sensors/actuators of DCS Yokogawa cards. Eliminating the risk of wiring mistakes, saving space in cabinets and reducing the time it takes to build cabinets, are some of the installers' main objectives. The interfaces also offer additional features which provide numerous benefits such as:
Redundancy: the interfaces have 2 40-pole (KS) or 50-pole (AKB) connectors for redundancy purposes.
Many of the interfaces activate a relay to indicate if one of the two possible power sources has dropped below a value of approximately 12 V.
The cards can be mounted via tension clamp or screw connection.
The interfaces can be adequately coated to withstand corrosive environments with a G3 rating (on request)
Multiple functions are integrated: isolators, fuses with status indicator, relay and status LEDs.
This is just a small sample. Other products are also available.
Passive modules for a wide variety of applications: 1) Transmission of field signals to the following types of plug-in connectors:
Flat-cable connectors in accordance with IEC 60603-13/DIN 41651 (RSF).
SUB-D connectors in accordance with IEC 807-2/DIN 41652 (RSSD).
SUB-D high-density connectors (RSSD HD).
ELCO (RS ELCO) connectors.
RJ45 (RS RJ45) connectors.
USB inserts (RS USB)
2) Distribution of potential (RS VERT) 3) Modules with diodes (RSD/ RDS) for checking lamps, for example. 4) RSM interfaces with 12.7 mm or 6.1 mm relays, versions 1 CO and 2 CO. With tension clamp, PUSH IN or screw connection. They all reduce the cabling in the cabinet.
Relay bases (RSM) with common positive and negative to be connected to PLC or other type of controllers. The interfaces are made up of groups of 4, 8 or 16 RCL relays (12.7 mm) or RSS (6.1 mm). The connection to the controller can be set up using pluggable connectors or using direct cabling with IEC 60603-13 connectors. Wide range of options:
1 or 2 CO contacts with 16/8/6 A relays
Voltages from 5 to 230 V
Screw, tension clamp or PUSH IN connection
Compatible with Weidmüller's solid-state relays
The range of relays provides galvanic isolation between input/output as well as between the adjacent contacts on the relays. This enables the various voltages in the controllers and those required by the various field elements to be safely adapted.
With increasing plant complexity, the obsolescence of certain PLCs and the relentless growth in demand for I / O signals, many installations or plants are having to replace existing controllers with new ones, without modifying existing field cabling.
With the aid of adapters, pre-assembled cables and interfaces from Weidmüller the problem of replacing one PLC system with another can be solved easily and safely: users can maintain the existing field cabling, test the new system and keep installation downtimes to a minimum.