ABB 70AB01c-ES HESG447224R2 Thermocouple input module

Push-Pull Operators An illuminated Push-Pull pushbutton unit, arranged for one-hole mounting, can replace two pushbuttons and a pilot light or the non-illuminated form can replace two pushbuttons. These units are available in three basic types: 

■ Maintained — (Two-Position). Maintains in the pulled or pushed position until manually actuated to the opposite mode. 

■ Momentary — (Three-Position). Spring returns to an intermediate position when pulled or pushed and released.

■ Momentary Pull, Maintained Push — (Three-Position). Spring returns to intermediate position when pulled. Maintains in pushed position until manually returned to intermediate (ready to reset) position. Maintained stop holds circuit open and will prevent other series connected operators from starting the system. The Operators, Buttons, Contact Blocks, etc., are offered as building block components that can be intermixed to satisfy many requirements. This minimizes the need for a varied and costly inventory.

Application Guide 

To assist in the selection of contact blocks, the sketch to the right shows pictorially by symbols A and B locations of contact circuits after assembly of contact blocks and adapter to the operator. The chart below shows the effect of the push and pull operations on either NO or NC contacts. (X = contact closed, O = contact open)

Selector Switch Selection 

Cam and Contact Block Selection Selector switches in their varied forms (2-position, 3-position and 4-position) are a big factor contributing to the great flexibility of control that a well rounded line of “pushbuttons” can achieve. Because of their flexibility, they tend to cause difficulty with product selection and application. The following systematic approach should simplify that task

Company product range

----------------------Ruichang Mingsheng Automation Equipment Co., Ltd----------------------

PLC module, programmable controller, CPU module, IO module, DO module, AI module, DI module

Network communication module,

Ethernet module, motion control module, analog input module, analog output module, digital input module, digital output

Module, redundancy module, power module, relay output module, relay input module, processor module

after-sales

Professional sales electric brand products around the world

Products overseas direct purchase, quality goods inventory, price concessions

After-sales warranty, models complete, the same product, different price and service.