Description
Strain gauge bridge amplifier ESME with a built-in safety circuit for SIL1 and PL c — in a DIN rail housing (22.5 mm wide) for the control cabinet.
The safety function sits inside the device: a second amplifier, two comparators and a semiconductor relay watch the bridge independently of the measuring channel. No safety controller is required — that is the difference to the SIL3 range, which does require one.
A usable measuring amplifier at the same time: 0.1 % of range plus sensor error, 24 bit resolution, output either 4 … 20 mA or 0 … 10 V. The identical version in an IP65 field housing is the ESMC.
Features of the ESME
✓ Sensor input: 1 × strain gauge full bridge 350 Ω
✓ Bridge sensitivity: up to 4 mV/V
✓ Bridge supply: 1.25 … 3 VDC
✓ Analog output: 4 … 20 mA or 0 … 10 V
✓ Accuracy: 0.1 % of range plus sensor error
✓ Resolution: 24 bit
✓ Switching output: 30 VAC/VDC, 500 mA max.
✓ Response time: 50 ms
✓ Safety rating: SIL1 · PL c — built in, no safety controller required
✓ Housing: DIN rail housing, 22.5 mm wide
✓ Protection: IP20