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DMS-20PC-4 数据表(PDF) 2 Page - Murata Power Solutions Inc. |
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DMS-20PC-4 数据表(HTML) 2 Page - Murata Power Solutions Inc. |
2 / 6 page DMS-20PC-4/20 Series Subminiature 4-20mA Loop-Powered 3½ Digit LED Process Monitors MPM_DMS20pc-420.C02 Page 2 of 6 Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com OPERATING AND SETUP INSTRUCTIONS Performance/Functional Specifications Typical at TA = +25°C, unless otherwise noted. The DMS-20PC-4/20, using any of the DIP-switch settings described above, can withstand overcurrents, including those resulting from accidental reverse-polarity connections, up to ±40mA without sustaining any damage. Because DATEL's DMS-4/20 loop-powered meters employ active circuitry to convert the loop current into a voltage, the meters' effective series impedance varies in a manner that maintains the loop voltage drop constant over the full 4-to-20mA current range. Listed impedance specification applies at 20mA. When looking up DIP-switch settings in the Tables and the desired display readings can be achieved with either of two different settings, using the higher setting # will produce less sensitive offset (R3) and span (R7) adjustments. Please keep in mind that the DMS-20PC standard meter (from which the DMS- 20PC-4/20 is derived) has an accuracy specification of ±2 counts (max.). Thus, it may not always be possible to obtain the exact desired display reading. 1. Set R7 (full scale span/gain adjust) and R3 (zero/offset adjust) fully clockwise, roughly 22 turns, and place SW1-SW6 to OFF. 2. Select DIP switch setting #2. 3. Apply a precision 4mA input, with proper polarity, and adjust R3 until the meter's display reads "000". 4. Apply a precision 20mA input and adjust R7 until the meter's display reads "1000". Repeat steps 3 and 4 to make sure the adjustments do not affect one another. 5. Select the appropriate decimal point by setting SW4, SW5 or SW6 to ON (DP1, DP2 or DP3 respectively). NOTE: If a display reading other than "000" to "1000" is desired, refer to DIP–Switch Settings Table 1 for SW1–SW3 settings. Display Reading SW1 SW2 SW3 4mA 20mA 1. 000 to 1050-1999 Off Off Off 2. 000 to 650-1350 On Off Off 3. 000 to 450-800 Off On Off 4. 000 to 300-500 Off Off On 5. 000 to 200-300 On On On Table 1. DMS-20PC-4/20S (Unipolar Model) DIP-Switch Settings DMS-20PC-4/20S-C Unipolar reading, loop-powered LED meter DMS-20PC-4/20B-C Bipolar reading, loop-powered LED meter DMS-20PC-4/20P-C Positive reading, loop-powered LED meter DMS-PS4-CM-C +24V/0.45A AC/DC power supply module DMS-BZL3-C Bezel assembly DMS-BZL4-C Bezel assembly with sealing gasket DMS-20-CP Panel cutout punch A panel-mount retaining clip is supplied with each model. 1. Desired display readings are: 4mA ="0.00" 20mA = "6.00" Use DIP-switch setting #3 in Table 1 and enable decimal point DP2 via SW5. Apply 4mA and adjust R3 so the display reads "0.00". Apply 20mA and adjust R7 so the display reads "6.00". 2. Desired display readings are: 4mA = "000" 20mA = "800" Use DIP-switch setting #2 in Table 1. Apply 4mA and adjust R3 so the display reads "000". Apply 20mA and adjust R7 so the display reads "800". For these display readings, no decimal points are used. Set SW4, SW5 and SW6 to OFF. Examples (DMS-20PC-4/20S-Unipolar Model) DMS-20PC-4/20S (Unipolar Reading Model) As shipped, the DMS-20PC-4/20S is factory calibrated to read "000" for a 4mA input and "1000" for a 20mA input. The following worst-case procedure assumes the DMS-20PC-4/20S is completely mis-adjusted, i.e., both potentiometers and the DIP switches are randomly set. When performing DIP-switch settings, be sure the DIP switch's small actuators are firmly engaged in their fully-ON or fully-OFF positions. Current Loop Input Min. Typ. Max. Units Full Scale Input Range: +4 – +20 mA Input Impedence: – 250 Voltage Drop – 4.5 5.0 Volts Overvoltage Protection –– ±2 mA Performance Sampling Rate 2.5 reading per second Accuracy (1 minute warm-up): ±0.05%FS ±1 Count Temperature Drift (0 = +50°C) – ±0.15 ±0.3 Cnts/°C Display Display Type and Size 3½ digit, 0.37"/9.4mm high red LED Polarity Indication "–" for negative reading Overrange Indication "–1____" for negative Vin "1____" for positive Vin Physical/Environmental Operating Temperature 0 – +60 °C Storage Temperature –40 – +75 °C Humidity (non-condensing) 0– 95 % Case Material Polycarbonate Weight 0.6 ounces (17 grams) Ordering Information 1 2 3 4 56 ON 123 4 5 6 ON |
类似零件编号 - DMS-20PC-4 |
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类似说明 - DMS-20PC-4 |
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