4.3 Standard G1 Current Loop Output Characteristic
The G1 unit will deliver a current loop output (feedback signal) according to the graphs below. If feedback is required (such as external
monitoring), calibrate the current loop receiver (external PLC or controller) according to Fig: 4.3 and Fig. 4.4.
In Temperature Controller Mode, the Actuator will output the current temperature being sensed by the Emech Temperature Sensor and
transmit according to the scale shown in Fig. 4.3.
In Positioner Mode, The Emech actuator has very precise rotational control step resolution of 0.07- 0.8degree rotation for the G12 and
G13 respectively for a 0.12mA input increment change;
While the actuator will respond to a minimum 0.12mA loop input change and rotate the actuator at a 0.07degrees rotation movement,
the Position Feedback Confirmation m loop output signal back from the Actuator to the PLC, which confirms the actuator shaft
position, as the actuator has an independent confirmation via a lower resolution optical encoder as compared to the stepper motor
increments, the confirmation back to the PLC is only approximately every 6 degrees of rotation. Figure 4.
As can be obtained from the above graphs, the full control range in either Temperature control (0-100°C or 32..212°F) or Position
control (0...100%) corresponds to a Loop Output range of 5 to 19 mA (linear response). This has been implemented to obtain the same
output loop signal as the input loop=controlling signal when the Actuator is in control.
A loop signal output of 20 mA indicates an error condition. Check the Actuator display for the error number, and see
section 6.6 for error code definitions.
Armstrong
International
221
Armstrong Blvd., Three Rivers, Michigan, 49093 - USA
Phone (269) 279-3602 Toll Free (888) HOT-HOSE (468-4673)
Designs, materials, weights and performance ratings are
approximate and subject to change without notice. Visit
armstrong
international.com/emech for up-to-date information.
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