ABB positioner V18345 is a positioner with communication capability and electronically configurable parameters, with the following features:
Design features: compact design, modular structure, and excellent cost-effectiveness.
Pneumatic performance: The I/P module with a post-pneumatic amplifier can control the pneumatic actuator. By adjusting the three-position three-way valve, the positioning electrical signal is converted into a pneumatic signal in proportion. The actuator is continuously adjusted for pressurization or depressurization, and the gas consumption can be minimized when the set point is reached. There are two types: single-acting and double-acting, and each has two models of “fail-safe” and “fail-locked” to choose from. The “fail-safe” function means that when the power is off or the signal is off, the positioner output 1 is depressurized, and if it is a double-acting actuator, the output 2 is pressurized at the same time, so that the pneumatic actuator returns to the spring to make the valve run to a limited safe position; the “fail-locked” function means that when the power is off or the signal is off, the positioner output 1 (or output 2) is locked, so that the pneumatic actuator keeps the valve in the current position. If the air source is interrupted, the actuator depressurizes.
Operation: The positioner has a built-in operation panel with two lines of LCD and four buttons for local parameter configuration, commissioning and operation monitoring. It can also be operated by communication using an appropriate configuration program.
Communication function: The standard TZIDC has a local communication interface (LKS connector) and can also communicate via a 4~20mA signal line, both of which are based on the HART protocol.
Input and output: In addition to the analog position set point as input, it is also equipped with a digital input channel to activate various protection functions through the process control system, and a digital output channel for outputting alarm and fault information.
There are many specific models of abb positioner v18345 series of positioners. Some common models and their characteristics are as follows:
V18345-1010121001: single-acting, fault-safe reset, non-explosion-proof, with 4-20mA feedback two-wire system, connected to 1/2-14NPT;
V18345-1010221001: single-acting, fault lockout (three-break protection), non-explosion-proof, with 4-20mA feedback two-wire system, connected to 1/2-14NPT;
V18345-1010421001: double-acting, fault-safe reset, non-explosion-proof, with 4-20mA feedback two-wire system, connected to 1/2-14NPT;
V18345-1010521001: double-acting, fault lockout (three-break protection), non-explosion-proof, with 4-20mA feedback Feedback two-wire system, connection 1/2-14NPT;
V18345-2010121001, V18345-2010221001, V18345-2010421001, V18345-2010521001: with mechanical indicator;
V18345-2011221001, V18345-2017221001, etc.: intrinsically safe explosion-proof type.
Its technical features include:
Completely automatic debugging, simple operation, just connect the signal source, press the button, and all parameters can be automatically set within three minutes.
A truly intelligent instrument with a variety of optional communication protocols to adapt to the development of future control technology. The basic model adopts the HART protocol, which is convenient for on-site manual operation. All control parameters and diagnostic information can be changed through communication protocols and system communication.
Provide self-diagnosis information at any time, such as stroke accumulation, exceeding limit, leakage of regulating valve film or joint, valve locking, etc., timely detect valve abnormalities, and provide normal maintenance data basis.
ABB Positioner V18345 can provide valve position protection function with broken signal, lock valve position, and improve system safety.
The modules can be increased or decreased on site, and analog feedback output, digital feedback output (proximity switch, mechanical switch), mechanical valve position indication, etc. can be selected to facilitate function expansion during use, reduce the total number of valve accessories, and improve system safety.
Optional stainless steel shell to meet the use of special corrosive environments.
The same structure positioner is used for rotary and linear valves, which is convenient for the preparation of spare parts and reduces inventory.
The special nozzle baffle + three-way valve structure ensures extremely low instrument gas consumption (0.03kg/h) and extremely high seismic performance (10G, 80HZ), strong stability, and the I/P converter uses TEIP11 which has been tested in a large number of applications.
ABB Positioner V18345 is widely used in single-acting, double-acting, linear and angular actuators, and supports Hart communication. It is installed on pneumatic linear or angular stroke actuators. The control parameters matching the terminal control element are automatically determined by the intelligent positioner, which can save a lot of debugging time and achieve optimal control.
