UNCTIONAL DESCRIPTION:
IS210SAMBH1A is a Control Acoustic Monitoring Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Control Systems. The Mark VIe Control Acoustic Monitoring (SAMB) terminal board is a duplex terminal board providing 18 inputs for the Acoustic Monitoring System. The SAMB provides two terminal points per input channel for 18 channels on 36 terminals. It also provides an additional 18 buffered outputs on 36 terminals to connect external instrumentation for monitoring the AC voltage signal that represents the dynamic pressure signals from the combustor. SAMB includes passive electromagnetic interference (EMI) filters to protect against very high-frequency noise generated by external sources. SAMB includes the following features:
- Eighteen signal interface channels for acoustic monitoring, supporting duplex configuration.
- Channels 1 – 9 are configurable to support PCB Piezotronics constant-current charge amplifiers or charge converter signal amplifier (CCSA) outputs. Sensor power for the PCB sensors is independent of the sensor power for channels 10 – 18.
- Channels 10 – 18 are configurable to support PCB Piezotronics constant-current charge amplifiers or CCSA outputs. Sensor power for the PCB sensors is independent of the sensor power for channels 1 – 9.
- Eighteen buffered outputs provide ac signal content of the dynamic pressure signals without DC bias voltage
- Thirty-six Euro-style box-type terminal blocks for the customer inputs
- Thirty-six Euro-style box-type terminal blocks for the buffered outputs
- EMI protection for all inputs
- EMI filtered inputs fanned to the A and B slots
OPERATION:
A 24 V dc power source is available on the terminal board for all the transducers. There is a choice of current or voltage inputs using jumpers. One of the two analog output circuits is 4-20 mA, and the other can be jumper configured for 4-20 mA or 0- 200 mA. The same terminal board can be used for TMR applications. Transmitter/transducers can be powered by the 24 V de source in the control system, or can be independently powered. Terminal board jumpers J#A, J#B, and JO set up the type of voltage and current inputs, and select the type of current output. Each output is monitored by diagnostics, and a suicide relay in the I/O controller disconnects the corresponding output if a fault cannot be cleared by a command from the processor.
INSTALLATION:
The 10 inputs and two outputs are wired directly to two I/O terminal blocks mounted on the terminal board. Each block is held down with two screws and has 24 terminals accepting up to #12 AWG wires. A shield terminal attachment point is located adjacent to each terminal block. The 10 inputs and two outputs are wired directly to two I/O terminal blocks mounted on the terminal board. Each block is held down with two screws and has 24 terminals accepting up to #12 AWG wires. A shield terminal attachment point is located adjacent to each terminal block.
- Analog input, two-wire transmitter
- Analog input, three-wire transmitter
- Analog input, four-wire transmitter
- Analog input, externally powered transmitter
- Analog input, voltage ±5 V, ±10 V dc
- Analog output, 0-20 mA
- Analog output, 0-200 mA
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