ABB excitation board AINT-14C RAIO-01 RDCU-12C brand new from stock

Description

RAIO-01 extra wiring terminals for I/O modules. They can also be used for extra ground, return, or common

connections.

The Auxiliary Terminal Block with box terminals (catalog number IC670TBM002) has 13

terminals, each of which accommodates one AWG #14 (avg 2.1mm2 cross section) to AWG #22

(avg 0.36mm2 cross section) wire, or two wires up to AWG #18 (avg. 0.86mm2 cross section). The

Auxiliary Terminal Block with barrier terminals (catalog number IC670TBM001) has nine

terminals, each of which can accommodate one or two wires up to AWG #14 (avg 2.1mm2 cross

section)

RAIO-01 All Field Control I/O modules require field-side power for their I/O devices. Power supply

connections can easily be “daisy-chained” between modules with similar power requirements.

There is a 10 Amp maximum limit on any one screw. Alternatively, separate supplies can be used

on any combination of modules to provide isolation as needed.

The location of the power connection on an I/O module depends on the module type. For

information on power connection to a specific type of module, refer to its individual module

datasheet.

Power Wiring for Hot Insertion/Removal

RAIO-01 For Hot Insertion/Removal of modules, power must be switched off to the module being inserted or

removed. A means of removing power to the module should be provided during installation.

Noise Immunity

Good wiring practices are the foundation for reliable and predictable system operation.

The electrical environmental standards listed in chapter 1 should be used as benchmarks. Uncontrolled

combinational effects in a real installation, higher levels of noise, RAIO-01 or sources of noise with different

properties from those in the Standard can still cause problems. Therefore, it is important to follow

prudent wiring and suppression practices in the installation.

Wiring external to equipment and in cable trays should be separated following accepted practices.

Discrete switches and loads are usually two-wire devices. General practice is to terminate both

wires at the control panel. One side of discrete devices is usually a common supply or return tie

point. Field Control I/O Terminal Block and Auxiliary Terminal Block tie point connections

provide sufficient locations to accomplish this.

Suppression at the Output Load

Most solid state controls include load suppression within the output drive. AC solid state relays

and proximity switches turn off at low currents with some internal suppression. DC devices

usually specify suppression if not included with the device. Additional suppression is required if:

The stored load energy to be dissipated exceeds the rating of the module’s output

suppressor during the turn-off discharge time.

A mechanical contact is used in series with a driven output coil. Install additional

suppression such as a series resistor-capacitor snubber to counteract electrical noise that

occurs when the coil is switched by the external contact instead of the module.

Resistor-capacitor suppressors are preferred for low-current high-inductance loads that generate a

high rate of change in voltage (dv/dt). High power loads beyond the capacity of RCs use voltage

clamping devices such as MOVs, which are usually available from the manufacturer of the device.

Resistor-capacitor suppressors are also preferred to MOVs because they reduce EMI in addition to

absorbing load energy.

In general, the capacitor for an RC snubber should be the same value in microfarads as the coil

current in amperes, with the voltage rating at least twice the peak supply voltage. The resistor is

usually equal to the DC resistance of the coil. With DC coils, the capacitor is usually replaced with

a “flyback” diode oriented with the anode to the negative terminal of the coil. The resistor helps

maintain a fast dropout of the device; it can be eliminated if this is not of concern.

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Lead time problem
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For the simple purchase procedure of spare parts, ensure that they are delivered to the site in a timely manner, and help users reduce the risk of downtime caused by the shortage of spare parts
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