Armstrong International
221 Armstrong Blvd, Three Rivers, MI 49093 - U.S.A.
Tel: (269) 279-3602 Fax: (269) 279-3130
Designs, materials, weights, and performance ratings are
approximate and are subject to change without notice.
Visit armstronginternational.com for the most updated information.
Page 17 of 36
4.2 - Standard Configuration of Loop Input for Positioner Mode
4.0 - Current Loop I/O, cont.
The unit will respond to the current loop input when in REMOTE mode only (Refer to section 5.4). The full control range in Positioner mode
is 0-100%, corresponding to a Loop Input range of 5 to 19 mA. Calibrate the current loop transmitter (usually an external PLC or Controller)
according to the equations below.
If given a signal outside the 5-19 mA range, the actuator will behave according to the response curves given in Figure 4.2. Note that the
actual operating stroke is dependent on configuration settings and valve type, Figure 4.2 shows several common configurations.
Position Calculation: % of Max Open Position
For the input current range of 5 to 19 mA and position of 0 to 100% of the maximum open position.
Current input (mA) = (0.14 x Position required (%)) + 5
Position Calculation: 1/4 turn application in rotational Degrees
Current input (mA) = (0.1556 x Position required ( °CCW)) + 5
Position Calculation: Emech
®
F3 application in Degrees
Current input (mA) = (0.0609 x Position required ( °CCW)) + 5
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