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 12 of 36
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3.2.4 - Wiring of Actuator mA Loop Transmitter
3.0 - Electrical Installation, cont.
To comply with EMC (Electro Magnetic Compatibility) standards, the wiring must be placed in the conduit (must be connected to earth
ground) and shielded twisted pair cable (0.25mm
2
) should be used.
Depending on the type of input available on the controller (PLC), i.e.; isolated mA Loop input (isolated from earth potential Figure 3.4) or
non-isolated input (referenced to earth ground) and if a loop supply is available, different wiring schemes are feasible. See Figures 3.4 - 3.6.
Due to this arrangement the loop input is no
longer isolated which requires the input on
the controller to be isolated!
Figure 3.4
Controller with isolated 4-20mA loop input (recommended) using the
24VDC supply from the actuator by means of a wire link.
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