FBM219 FOXBORO
FBM219 Foxboro FOXBORO controller, FC is the abbreviation of FerruleConnector, and its external reinforcement adopts a metal sleeve and the fastening method is a screw buckle. Early on, FC type connectors used a planar contact method for the mating end face of ceramic pins. This type of connector has a simple structure, convenient operation, and easy production, but the fiber end faces relatively fine dust. Later, this type of connector was improved by using a spherical contact pin (PC) with a mating end face, while the external structure remained unchanged, resulting in a significant improvement in insertion loss and return loss performance.
The shell of the SC type fiber optic connector is rectangular, and the structural dimensions of the pin and coupling sleeve used are the same as those of the FC type. The end face of the pin is mostly ground using PC or APC type grinding methods; The fastening method adopts a plug and pull pin latch type, without the need for rotation. This type of connector is inexpensive, easy to insert and remove, has high compressive strength, and high installation density.
The ST type fiber optic connector shell is circular, and the structural dimensions of the pin and coupling sleeve used are the same as those of the FC type. The end face of the pin is mostly ground using PC or APC type grinding methods. The fastening method is a screw buckle. This type of connector is suitable for various fiber optic networks, easy to operate, and has good interchangeability. Current type control refers to comparing the output signal of the error amplifier with the sampled peak inductance current, in order to control the duty cycle of the output pulse and make the output peak inductance current change with the error voltage. The current controlled type is a first-order system, which is unconditionally stable. On the basis of traditional PWM voltage control, a current negative feedback link is added to make it a dual loop control system, so that the inductance current is no longer a single variable, thereby transforming the second-order model of the switching converter into a first-order system signal.
describe
Foxborough FBM219
Extended product type: PLC
Product number: FBM219
Foxboro type name: PLC
Foxboro FBM219 specifications
Series: I/A Series
Product type: Input voltage monitor
Dimensions (length x width x height): 3.5 x 45 x 22.7 cm
Weight: 1.04kg
