DC SIGNAL TO PULSE RATE TRANSDUCER |
The transducer converts a DC signal into a train of pulses, the rate of which is proportional to the input, thus integrating either a constant or time varying quantity.
Suitable inputs may be received from transducers, shunts and measuring devices with DC outputs.
The output is in the form of a contact closure, either voltage free for computers and data loggers, or live DC for counters and electromechanical devices.
A variety of input and output variations are possible.
The incoming signal is amplified and fed to a precision voltage to frequency convertor, which produces a variable frequency square wave. The wave is divided by a programmable CMOS counter and monostable which drives a relay.
| 1.Input | |
| Input quantity: |
0-20mA into 270 Ohm 0-10V into 100k Ohm 0-50mV (shunt) (other values available on request) |
| 2.Output | |
| Output quantity: |
voltage-free contacts - up to 1A, 24V max. (one change over contact) 24V DC live output 5V DC logic output Higher voltages, current and voltage separation can be acheived by using a slave relay. |
| Pulse length: | 100ms (other values availabel on request) |
| Frequency range: | 2Hz to 0.01Hz (higher frequency logic outputs available on request) |
| 3.Auxiliary Power Supply | |
| Voltage: |
110V, 220V 50Hz ±20% 24V AC or DC (other values available on request) |
| 4.Accuracy | |
| Error limit at rated conditions: | ±0.2% |
| Linearity error: | 0.1% |
| Long term drift: | 0.1% |
| Temperature shift: | 400ppm/°C |
| 5.Protection | |
| Impulse test between terminals: | 2kV AC |
| 6.Physical Constraints | |
| Working temperature: | -10°C to 55°C |
| Position: | Surface mounting in any position indoors |
| 7.Enclosure | K540 |