The speed and V-belt monitor is used to monitor rotary movement (underspeeds) on motor- or belt-driven shafts. Inductive proximity switches are used to record the speed. The pulses are generated on the sensor without contact by rotating switching cams, gears, segment disks, metallic signal flags or similar. When the operating voltage is applied, the relay is activated. The monitoring function is started via the drive's power contactor at terminals E1 and E2 after the start-up bridging has expired. If the drive falls below the cut-off speed, the relay drops back. The error message from the speed and V-belt monitor is reset by resetting or switching off the operating voltage. Operating voltage 230 V AC Recovery time 400 ms Monitoring type underspeed Monitoring range max. 4200 pulses/min. Switch-off range 120 pulses/min. Sensor input two-wire Start-up delay 60 s Outputs 2 changeover contacts (DPDT) Output / switching voltage 250 V Output / current 6 A Output / total current 8 A / across all contacts Display LED green, red Dimensions W x H x D 22.5 x 61.3 x 60 mm Weight 70 g Operating temperature range 0 °C to +55 °C Storage temperature range -20 °C to +70 °C Protection class housing / terminals IP40 / IP20
| Property | Value |
| Operating frequency: | 2 to 70 |
| With feedback loop: | no |
| Design of the electrical connection: | screw connection |
| Suitable for safety functions: | no |
| SIL according to IEC 61508: | without |
| With TÜV approval: | no |
| With approval for BG BIA: | no |
| With approval according to UL: | no |
| Width: | 22.5 |
| Height: | 60 |
| Depth: | 60 |
| Rated control supply voltage Us at AC 50 Hz: | 230 |
| Type of voltage for actuation: | AC |
| With removable terminals: | no |
| Evaluation of inputs: | single-channel |
| Speed monitoring function: | yes |
| Standstill monitoring function: | yes |
