Black Box AC328A-R4 Spécifications télécharger pdf (Page 10)

VALVETOP

™

POSITION SENSORS

The Industry’s Leading Selection of Position Sensors

Valvetop

™

provides the industry’s leading selection

of valve position sensors, including GO

™

Switch

leverless limit switches, proximity sensors, mechanical

limit switches, potentiometers, and 4-20mA position

transmitters.

™

SWITCH INSIDE PUSHSET CAM

- Highest amp rating (4amp/120vac, 3amp/24vdc)

- Highest temperature rating - 80°C

- Up to four GO Switches inside

- Hermetically Sealed contacts

- SPDT, DPDT, and Stainless Steel options

- Proximity operation – nothing to jam, bend, break,

or wear out

- Resistant to electrical noise, radio frequency

interference, dust, dirt, and most chemicals

- No leakage current, not voltage or polarity sensitive

- Simple device – inherently intrinsically safe with barrier

- Unlike Reed Switches, Gold ﬂashed contacts allow for

use in both low and high current applications within a

single switch

Unique pushset cam design allows

quick and accurate setting of the GO

Switch positions reducing deadband

and hysteresis to a minimum. Switches

can easily be set

in the mid-posi-

tion for control

applications such

as 3-way ball

valves or diverter

valves.

4-20mA POSITION TRANSMITTER

- Fully potted electronic module with LEDs

and Auto Calibration feature

- Precise setting of the zero and span can

be done in seconds for both CW and CCW

rotation with a simple push button

- Position feedback sensor is mounted

directly to the switchbox shaft eliminating

backlash caused by traditional gear train

- Up to 300° rotation for choke valve

applications

- The need for re-calibration is eliminated

- Available with GO Switches and HART

Protocol

PROXIMITY SENSORS

Choose from a variety of proximity sensors

including reed switches and inductive prox-

imity sensors such as Pepperl+Fuchs

™

and others.

- Up to 6 proximity sensors

- AC, DC, Namur versions available

MECHANICAL LIMIT SWITCHES

- Up to 6 mechanical switches

- 15A/120vac

- SPDT and DPDT contacts available

- Up to 6 mechanical switches

SENSORS & SWITCHES

- GO

™

Switch leverless limit switches

- 4-20mA position transmitters with

HART protocol

- Proximity

- Reed

- Mechanical

™

Switch leverless limit switches are hermetically sealed and outper-

form all other position sensors in hot, cold, wet, dirty, abusive, corrosive,

and explosive conditions. GO Switches deliver best-in-class capabilities:

PNEUMATIC SWITCHES

- Common in marine/shipbuilding industry

- Ideal for explosive or intrinsically safe

environments

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Black Box AC328A-R4 Spécifications Page 10

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