Артикул: RX7080
Module for monitoring and limiting the solenoid currents with proportional valves VT-MUXA2-2-1X
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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 °C | ||
| Reverse polarity protection | yes | |||
| Power consumption | P | VA | < 5 | |
| Current consumption | I | A | < 0.2 | |
| Fuse/short-circuit protection | 1 or 2 fuses for the solenoid currents, not exchangeable | I | 1.25 A fast-acting (SMD) | |
| Display LEDs (green) | OK | Is illuminated if the self-test has been completed, the relays have operated and there is no error | ||
| power | Is illuminated if the internal power supply unit works | |||
| 1) | see also derating characteristic curve on page 7 |
Inputs
| Command value differential input | U | 0 … +10 V or 0 … ±10 V, RE = 100 kΩ | ||
| Reset input | Low | UR | 0 … 6.5 V | |
| High | UR | 10 V … UB | ||
| 1 or 2 monitored solenoid current inputs | Admissible common-mode voltage | U | –2 V … UB | |
| Reverse polarity protection | by means of diodes | |||
| Admissible clock frequency of the solenoid currents | 0 … 500 Hz |
Outputs
| Command value output 1) | U | 0 … +10 V or 0 … ±10 V, I = 2 mA | ||
| 2 solenoid current outputs | I | 1.0 A (monitored to ±2 %) | ||
| OK output | High = OK | UB – 3 V / 50 mA, short-circuit-proof | ||
| Low = OK | < 2 V, Ri = 10 kΩ | |||
| 1) | Command value presetting at the amplifier |
Other information
| Clearances and creepage distances | according to EN 50178 | ||
| admissible degree of contamination | 2 according to EN 60664 | ||
| Anschlussart | 16-pole terminal housing with detachable terminals | ||
| Connection cross-section | A | 0.2 … 2.5 mm2 | |
| Mounting type | Top hat rail TH 35-7.5 according to EN 60715 | ||
| Protection class | IP 20 | ||
| Dimensions (W x H x D) | see unit dimensions on page 8 | ||
| Operating temperature range 1) | ϑ | °C | 0 … +50 |
| Storage temperature range | ϑ | °C | -25 … +85 |
| Weight | m | kg | 0.15 |
| 1) | see also derating characteristic curve on page 7 |
(For applications outside these values, please consult us!)
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