G438 |
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| TECHNICAL SPECIFICATION (G438) |
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| Potentiometer Input | |||
| Resistance (End to End): | 100W up to 100KW | ||
| Input Impedance: | >1MW | ||
| Input Excitation: | 500mV, 5mA maximum drive. | ||
| Zero Turn-Up: | 80% of full scale input | ||
| Span Turn-Down: | 80% of full scale input (Table 1) | ||
| Common Mode Rejection: | 1800VDC (input to ground) | ||
| Output | Voltage Output | ||
| Output: | 0-5V, 0-10V | ||
| Source Impedance: | <10W | ||
| Drive: | 10mA, max. (1KW min. @ 10V) | ||
| Current Output | |||
| Output: | 0-1mA, 0-20mA, 4-20mA | ||
| Source Impedance: | >100KW | ||
| Compliance: | 0-1mA; 7.5V, max. (7.5KW, max.) | ||
| 0-20mA; 12V, max. (600W, max.) | |||
| 4-20mA; 12V, max. (600W, max.) | |||
| Accuracy Including Linearity, Hysteresis | ±0.1% maximum at 25°C. | ||
| Stability | Temperature: | <±0.05%/°C maximum of full scale range. | |
| Response Time (10 to 90%) | <200mSec., typical. | ||
| Common Mode Rejection | DC to 60Hz: 120dB | ||
| Isolation | 1800VDC between line power and input, output | ||
| EMC Compliance (CE Mark) | |||
| Emissions: | EN50081-1 | ||
| Immunity: | EN50082-2 | ||
| Safety: | EN50178 | ||
| LED Indication (green) | Active DC power | ||
| Humidity (Non-Condensing) | |||
| Operating: | 15 to 95% (@ 45°C) | ||
| Soak: | 90% for 24 hours (@ 65°C) | ||
| Temperature Range | |||
| Operating: | 0 to 55°C (32 to 131°F) | ||
| Storage: | -25 to 70°C (-13 to 158°F) | ||
| Mounting | Horizontal DIN rail mounting is recommended. Vertical DIN rail mounting requires heat sink (model HS01, included) and circulating airis recommended. | ||
| Power | Consumption: | 1.5W typical, 2.5W max | |
| Range: | 9 to 30VDC | ||
| Weight | 0.48 lbs | ||
| Agency Approvals | CSA certified per standard C22.2, No. 0-M91 and 142-M1987 (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 | ||
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Configuration For example, in a valve positioning application a potentiometer is sometimes used as a feedback signal. Quite often a wide open valve is only a 25% turn of the feedback potentiometer. In this case the G438 can easily be adjusted with the zero and span to provide a full scale output signal (e.g. 4-20mA) representing 0-25% or even 50- 75% of the potentiometer input. Unless otherwise specified, the factory presets the Model G438 as follows: Input Range: 0 to 100%/Output: 4 to 20mA. The DC power input accepts any DC source between 9 and 30V; typically a 12V or 24VDC source is used (see Accessories). For other output ranges, refer to Tables 1 and 2 to reconfigure switches SW1 and SW2 for the desired input and output ranges. |
Calibration
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