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EHELP: Can the SPA2 be placed in an existing 4-20mA loop as passive?

EHELP: Can the SPA2 be placed in an existing 4-20mA loop as passive?
Q. Can the SPA2 be placed in an existing 4-20mA loop as passive? 

A. The SPA2 can be wired using the passive input (+I and COM) in series in your 4-20mA loop. It will add about 20 ohms to the loop.

When ordered with the Analog Output (-AO) option, the SPA2 provides a proportional and isolated analog retransmission of the input signal that can be sent to remote monitoring/control devices like a DCS, PLC, PC, indicator or data recorder, making it  completely isolated from the input. All analog parameters can be selected using the SPA2 push buttons or the free easy-to-use Intelligent PC Configuration Software.

The SPA2 Programmable Limit Alarm Trips provide on/off control, warn of unwanted process conditions, alarm on rate-of-change, and provide emergency shutdown.  Very versatile, the SPA2 accepts a signal input from transmitters, temperature sensors, and a wide array of other monitoring and control instruments such as current and voltage signals, 23 RTD Types, 9 Thermocouple Types, resistance and potentiometer devices, and Direct Millivolt Sources. Features of the SPA2 include 20-bit input resolution, long-term stability with up to 5 years between calibrations, large 5-digit process and status readout, and isolated RFI/EMI protection.

Learn more about the SPA2.

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Published: August 9, 2017
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Categories: E-Help
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