Description
Strain gauge bridge amplifier SMM-HD-SIL1 with a built-in safety circuit for SIL1 and PL c — in an IP65 field housing for mounting outside the control cabinet.
The difference to the SIL3 range: 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 — the device switches by itself.
That makes the SMM-HD-SIL1 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.
Features of the SMM-HD-SIL1
✅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: U-CASE 2 field housing
✅Protection: IP65
✅Order key: Q X X X X - X X