Q501 |
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| TECHNICAL SPECIFICATION (Q501) |
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| Input | Ranges: | see Table 1 | |
| Impedance: | >100KW(voltage inputs), < 20W (20mA Inputs), < 400W (1mA Inputs) | ||
| Protection: | withstands up to 24VDC (current input), 120VAC (voltage input) without damage | ||
| Output Range | 4-20mA | ||
| Supply Voltage Range | 12 to 35VDC, each channel | ||
| Output Accuracy | < 0.1% of full-scale input typical, < 0.2% maximum @23oC including linearity, repeatability and hysteresis | ||
| Adjustability | Front accessed 10 turn, + 5% of span for zero and span, typical | ||
| Stability | < 0.025%/oC of full-scale maximum | ||
| Capable of meeting IEC 801-2 level 2 (4kV) | |||
| ESD Susceptibility | Capable of meeting IEC 801-2 level 2 (4kV) | ||
| Isolation | 1800VDC or peak AC between input and output and channel to channel | ||
| Response Time | 100mSec typical (10 to 90%) | ||
| Temperature | Operating: | -40 to 80C (-40 to 176F) | |
| Storage: | -40 to 80C (-40 to 176F) | ||
| Humidity (non-condensing) | |||
| Operating: | 15 to 90% (@45C) | ||
| Wire Terminal | Socketed screw terminals for 12-22 AWG | ||
| Weight | CSA certified per standard C22.2 (File No. | ||
| Agency Approvals | CSA certified per standard C22.2 (File No. LR42272). UL recognized per standard UL508 (File No. E99775). CE conformance per EMC directive 89/336/EEC and low voltage 73/23/ EEC (Input <75VDC) | ||
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Application Typically, DC voltages or currents from various field instruments (e.g. level, flow, pressure and position sensors) are used to monitor and control a manufacturing process. Voltage signals can only run a short distance to a panel without errors caused by noise or lead resistance in the wires. These sensor (voltage) signal wires are usually terminated at the two-wire transmitter and converted into a 4-20mA signal which is highly immune to noise and not affected by lead resistance, both of which can cause significant errors in voltage signals transmitted over long distances.
The 1800VDC isolation capability of the Q501 prevents ground loops from causing errors in DC voltage or current signals and may reduce susceptibility to Radio Frequency Interference (RFI). Isolation also provides protection from high voltages and current spikes which may damage expensive Supervisory Control And Data Acquisition (SCADA) equipment, such as a PLC or DCS. |
The ActionI/Q model Q501 operates as a twowire transmitter; each channel derives its power from a (12-35VDC) source connected in series with the 4-20mA output loop. Typically a 24VDC source is used for power, allowing 12VDC (600W @ 20mA) for other devices connected in series, in the current loop. The outputs of the Q501 are isolated from the inputs and protected from reverse polarity. Zero and span pots are provided for each channel to calibrate the output to the input source (+/-5%). The Q501 provides a single or dual channel, DC input, isolating, two-wire transmitter in one package. Standard input ranges (see Table 1) are calibrated to rated accuracy. One range per module; one or two channels per module. Calibration
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