RELIANCE RDASR-1 – Remote Data Acquisition and Switching Relay

Description

1. Technical specifications

• Channels: 32 digital inputs + 32 digital outputs, TTL/CMOS compatible
• Input voltage: 5–24 VDC, isolated per channel (500 VAC)
• Output type: Form-C relay contact, 250 VAC/30 VDC, 2 A resistive
• Scan/update cycle: 1 ms for full 64 I/O
• Communication: RS-485 Modbus RTU, 115.2 kbaud max; optional Ethernet via add-on card
• Power supply: 24 VDC ±10 %, 7 W typical, 12 W max
• Isolation: channel-to-channel and channel-to-ground 1 kV
• Indicators: green LED per channel, red fault LED on front panel
• Operating temperature: –25 °C to +70 °C
• Storage temperature: –40 °C to +85 °C
• Dimensions: 6U × 160 mm × 220 mm; weight 1.2 kg

3. Functional features

• Hot-swap capability – modules can be replaced without powering down the rack
• Auto-detect Modbus address – simplifies commissioning
• Configurable debounce and pulse stretching on inputs
• Watchdog relay for fail-safe operation
• Built-in self-test routine accessible via front push-button or remote command
• DIN-rail or 19-inch rack mounting clips included

4. Application scenarios

• Factory automation – PLC expansion for high-speed packaging, labeling, and sorting lines
• Test stands – automotive ECU and hydraulic valve test rigs requiring deterministic switching
• Energy – turbine control cabinets, breaker status monitoring and remote trip circuits
• Process plants – valve position feedback and alarm annunciation for DCS and SCADA systems