Description Component series 1X Features Shut-off of the solenoid currents after exceedance of the admissible maximum current Additional, not safety-relevant command value correction prevents early switch-off of the solenoid currents Additional fuse protection of the solenoid circuits by non-exchangeable fuses 1.25 A, fast-acting according to IEC 60127-4 Redundant relay contacts per solenoid circuit Redundant solenoid current measurement per solenoid circuit Reverse polarity protection of the solenoid circuits Reverse polarity protection of the operating voltage Reset input – edge-triggered Differential input Command value output OK output Top hat rail mounting Pluggable connection terminals Product description Use The VT-MUXA2-2 module can be used to monitor 1 or 2 solenoid circuits. The solenoid currents are limited so that there is no overheating of the solenoids. The solenoid currents necessary for operating the valve are provided by an amplifier (order separately). The amplifier is adjusted according to the rated current data of the solenoid (rated current = 1.03 A). With a command value presetting of 10 V, it provides an output current of 1.0 A. In case of defect or incorrect operation, the amplifier may provide a current of more than 1.0 A. The interconnected VT-MUXA2-2 monitoring module recognizes the over-current, reduces the command value or switches off the solenoid current. The VT-MUXA2-2 monitoring module must be protected against voltage peaks from the 24 V mains. Our VT 11110 capacitor module protects against voltage peaks and smooths the 24 V supply voltage. Explosion hazard in case of incorrect assembly! Please observe the following rules under any circumstances! The Rexroth electronics listed in this data sheet must be installed and operated outside the potentially explosive area. The VT-MUXA2-2 module must be switched between amplifier output and solenoids and between control output (command value presetting by superior control) and amplifier input (see block diagram). Only connect valve solenoids the maximum current of which complies with the monitoring current of the VT-MUXA2-2 monitoring module. Notice: The VT-MUXA2-2 module is an electrostatically endangered component. It has to be assembled complying with ESD protective measures. Type code 01 02 03 04 05 06 07 VT-MUXA 2 – 2 – 1X / V0 1A * 01 Analog module for monitoring solenoid coils VT–MUXA 02 Monitoring for valves with one or two solenoids 2 03 Serial number (module type) 2 04 Component series 10 ... 19 (10 ... 19: unchanged technical data and pin assignment) 1X 05 Standard version V0 06 Imax = 1.0 A 1A 07 Further details in the plain text * included in the scope of delivery: two ferrite sleeves for lines between amplifier and monitoring module conducting solenoid current Technical data General Component series 1X Operating voltage Operating voltage Nominal value UB 24 VDC Maximum value 1) U(t)max 30 V at 0 °C ≤ ϑU ≤ 40 °C Minimum value 1) U(t)min 18 V at 0 °C ≤ ϑU ≤ 40
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