OPTO 22 Modular M4RTU, Руководство пользователя

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70 M4RTU/M4 I/O User’s Guide
0 to 5 Amp AC/DC Current Input
The 0–5A AC/DC current input module can be used to measure current directly or indirectly through a standard
current transformer. Applications include measuring or monitoring current through a field device such as a
motor, solenoid, or lamp.
Use Figure 5-8 to wire a 0–5A AC/DC current input module (model G4AD16). The example shows wiring of the
G4AD16 to channel 0 on the M4RTU/M4 I/O.
Velocity Input
The velocity input module (model G4AD26) indicates a change in voltage by providing the first derivative of
voltage with respect to time (dV/dt). Typically, potentiometer-based transducers are attached. An example of
an application would be a transducer measuring piston velocity in an air/hydraulic cylinder.
Use Figure 5-8 to wire the velocity input module. The example shows wiring of the G4AD26 to channel 3 on the
M4RTU/M4 I/O.
Thermocouple Input
Use Figure 5-9 to wire the analog thermocouple input modules listed in Table 5-5. The example shows a
thermocouple input module wired to channel 3 on the M4RTU/M4 I/O.
When wiring thermocouples, verify that you are using the proper polarity and wire color (see Table 5-5). Also
ensure that the wire type from the thermocouple to field terminals is consistent and does not introduce other
thermocouples.
FIELD WIRING
Figure 5-8: Wiring for Velocity Input
and 0–5A AC/DC Input Modules