signal converter / amplifier | HD978TR...
Configurable signal converters/amplifiers with current or voltage output.
general information:
HD978TR3, HD978TR4, HD978TR5 and HD978TR6 are signal converters/amplifiers configurable with mV input. The mV input signal range can be configured from -10mV to +60mV via a button, by using the HD778-TCAL simulator and DeltaLog7 software or a tension calibrator with mV output. HD978TR3 and HD978TR5 have a 4 to 20mA current output. HD978TR4 and HD978TR6 have 0 to 10 V DC voltage output.
0 to 1 V DC, 0 to 5 V DC and 1 to 5 V DC outputs are available upon request. A LED indicates the alarm situation and it helps the user during the programming. The instrument is also protected against polarity inversions.
Input and output are galvanically isolated: this is necessary to eliminate problems due to the mutual influence of the devices originated by disturbs caused by the different mass paths. The device is housed in a DIN container (width 35 mm) with standard connection to a 35 mm DIN rail for the models HD978TR3 and HD978TR4 or in a housing for wall mounting for the models HD978TR5 and HD978TR6. The 4 to 20 mA current output stage of HD978TR3 and HD978TR5 is a passive two-wire and it supplies power to the converter through the current loop.
construction types:
HD978TR3
Configurable signal converter/amplifier with 4 to 20 mA (20 to 4 mA) output, for DIN rail mounting. Input measuring range -10 to +60 mV. Default setting 0 to 20 mV. Minimum measuring range 2 mV.
HD978TR4
Configurable signal converter/amplifier with 0 to 10 V DC (10 to 0 V DC) output, for DIN rail mounting. Input measuring range -10 to +60 mV. Default setting 0 to 20 mV. Minimum measuring range 2 mV.
HD978TR5
Configurable signal converter/amplifier with 4 to 20 mA (20 to 4 mA) output, for wall mounting. Input measuring range -10 to +60 mV. Default setting 0 to 20 mV. Minimum measuring range 2 mV.
HD978TR6
Configurable signal converter/amplifier with 0 to 10 V DC (10 to 0 V DC) output, for wall mounting. Input measuring range -10 to +60 mV. Default setting 0 to 20 mV. Minimum measuring range 2 mV.
specifications:
| input | |
| measuring range: | -10 mV to +60 mV configurable |
| default range: | 0 mV to 20 mV |
| minimum measuring range: |
2 mV |
| input impedance: |
>1 MOhm |
| conversion speed: | 2 measures per second |
| accuracy: | ±0.04 %F.S. ±20 μV |
| operating temperature: | -30°C to +70°C |
| storage temperature: | -40°C to +80°C |
| relative humidity: | 0 % to 90 % r.h. (without condensation) |
| output | |
| type of output: | HD978TR3 und TR5: 4 to 20 mA (or 20 to 4 mA), two-wired, 22 mA, in case of unconnected input HD978TR4 und TR6: 0 to 10 V DC, (0 to 1 V CC, 0 to 5 V DC, 1 to 5 V DC upon request) |
| resolution: | HD978TR3 und TR5: 4 µA HD978TR4 und TR6: 20 µA |
| protection against polarity inversion: | 40 Vmax |
| sensitivity to V DC power voltage variations: | HD978TR3 und TR5: 0.4 µA/V HD978TR4 und TR6: 2 µA/V |
| load resistance: | HD978TR3 und TR5: RLMax = (V CC - 9) / 0.022 RLMax = 625 Ω mit V DC = 24 V DC HD978TR4 und TR6: >10 kΩ |
| input/output galvanic isolation: | 50 V CC (verified at 250 V) |
| red LED: | it turns on while programming, when the probe is broken or not connected |
| heating time: | 2 minutes |
| thermal drift: | 0.02 % F.S./°C |
For further details p.r.t. data sheet:
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