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Spare parts spare parts, the DCS control system of PLC system and the robot system spare parts,

Brand advantage: Allen Bradley, BentlyNevada, ABB, Emerson Ovation, Honeywell DCS, Rockwell ICS Triplex, FOXBORO, Schneider PLC, GE Fanuc, Motorola, HIMA, TRICONEX, Prosoft etc. Various kinds of imported industrial parts

Products are widely used in metallurgy, petroleum, glass, aluminum manufacturing, petrochemical industry, coal mine, papermaking, printing, textile printing and dyeing, machinery, electronics, automobile manufacturing, tobacco, plastics machinery, electric power, water conservancy, water treatment/environmental protection, municipal engineering, boiler heating, energy, power transmission and distribution and so on.

MOOG D138-002-002 Encryption dog

As described at the beginning of the chapter, there are various options for configuring the inputs/outputs. The board SDCS-IOB-3 consists of the 5 analogue inputs, 3 analogue outputs, the galvanical isolated pulse encoder interface and a current source for temperature measuring devices. If these boards are in use, they have to be mounted outside the DCS module. They must be mounted in a way, that the conductive supports have a good connection to ground of the installation. The cable length between X1:/X1: and X2:/X2: is 1.7 m and between X1:/X3: is 0.5 m because of EMC reasons.

When the SDCS-CON-2 control board with the SDCS-IOB-3 I/O board is installed, the connection through plugs S4:1-2 and 3-4 on the SDCS-CON-2 must be severed. Terminals X3:, X4: and X5: on the SDCS-CON-2 must not be used.

If the drive’s direction of rotation is correct (if necessary, correct by exchanging the field connections), the Tacho error message may appear during start-up. If with a positive reference the TACHO_PULSES signal (with software 21.xxx: parameter 12104) does not look like the illustration below, then tracks A and A must be mutually exchanged with encoders with inverted signals, and tracks A and B with encoders without inverted signals.

Earth fault protection 

is based on a sum current transformer where the secondary is connected through 100 resistor to a diode bridge. Voltage will appear across the resistor, if the sum of the 3 phase current is not zero. Restrictions using jumper S1, S2 or S3: The selection for the burden resistor across the input terminals can be done independent from S2 or S3 settings for inputs AITAC, AI1, AI2, AI3 and AI4. If the gain is set to 10 by using S2 or S3 and the 500  burden resistor is activated, the input signal level is changed to -2 mA...0...+2 mA. For input AI4 there are the following configurations available: - input range ”20mA” , or - input range ”10V”, or - earth fault monitoring by Isum not equal to zero designated for PT100 evaluation per software and hardware ➅ If the input is used for tacho feedback and the tacho voltage needs to be scaled, the board PS5311 must be ordered separate. If this input is used for feedback signals, there is a need for any additional margin of overshoot measurements. This margin is set by software and results e.g. in the 8 to 33 volts at PS5311. * short circuit proof If the TACHO_PULSES signal is missing or non-linear, the encoder’s pulses are not being read correctly. Possible reasons for this may be the encoder supply, the encoder itself, or the wiring.

Connecting a pulse encoder to the DCS 500 converter 

The connection diagram for a pulse encoder to the electronics of a DCS converter is quite similar, if the SDCS-IOB-1/SDCS-CON-2 or the SDCS-IOB-3 is used. The basic difference between these 2 boards is the galvanical isolated circuit on the SDCS-IOB-3 board. Power supply for incremental encoder There is a galvanically isolated power supply for the incremental encoder on SDCS-IOB-3. The jumper S4 on this board is used to select either +5 V, +12 V or +24 V as a supply voltage for the pulse encoder. When LED indicator (V17) is lit, the supply is OK. The pulses generated by the pulse encoder are transferred to the pulse receivers via opto couplers.

If the SDCS-IOB-1/SDCS-CON-2 board is used the supply voltage for the pulse encoder is selected on the SDCS-POW-1 board (refer to SDCS-POW-1). In both cases the voltage regulator has a feedback control with Sense power and Sense GND signals. Feedback connection is recommended when power supply level for differential pulse encoder is 5V. If a 12 V pulse encoder type is in use the sense function is also available. The wiring is shown on figure 6.3/4.