This manual covers installation, electrical connections, menu functions, and troubleshooting for the Signet 8550-2 Flow Transmitter.
The Signet 8550-2 Flow Transmitter is a device designed to work with Signet Flow Sensors featuring frequency output. It provides a 4 to 20 mA isolated current output with a maximum loop impedance of 600 Ω at 24 V. The unit features two sets of programmable mechanical SPDT relay contacts and an alphanumeric 2 x 16 LCD display.
| Current output range | 4 to 20 mA, isolated, fully adjustable and reversible |
|---|---|
| Max loop impedance @ 24 V | 600 Ω max. |
| Update rate | 100 ms |
| Accuracy | ±0.03 mA |
| Relay output rating | 5 A @ 30 VDC, or 5 A @ 250 VAC |
| Operating temperature | -10 to 70 °C |
| Sensor input range | 0.5 to 1500 Hz |
| Power supply | 12 to 24 VDC ±10% |
The maximum loop impedance is 600 Ω at 24 V, 325 Ω at 18 V, and 50 Ω at 12 V.
The relay outputs are rated for 5 A at 30 VDC or 5 A at 250 VAC with a resistive load.
Yes, the relays can be programmed to generate pulses proportional to volume, with a maximum of 300 pulses per minute.