OMRON SRT1-OD04 Transistor Remote Terminal Block

The OMRON SRT1-OD04 is a transistor output remote terminal block engineered for distributed I/O control in industrial automation systems. This four-point output module integrates into OMRON’s CompoBus/S high-speed communication network, enabling centralized control of remote devices across multi-drop and T-branch topologies. The unit features PNP output architecture with individual LED status indicators and DIP switch configuration for node addressing and communications parameters.

– Technical Specifications

Electrical Performance
• Rated voltage: 24 VDC
• I/O power supply: 24 VDC +10% / −15%
• Communications power supply: 14 to 26.4 VDC
• Rated output current: 0.3 A per point
• Residual voltage: 0.6 V max.
• Leakage current: 0.1 mA max.
• Current consumption: 50 mA max. at 24 VDC (excluding external sensor and load current)
• Power interrupt time: 2 ms min. (DC type)

Physical Characteristics
• I/O points: 4 output channels
• Weight: 80 g max.
• Terminal screw size: M3
• Vibration resistance: 10 to 55 Hz, 1.5 mm double amplitude
• Shock resistance: 200 m/s²
• Ambient humidity: 10% to 90% (non-condensing)
• Atmosphere: Corrosive-gas-free environment required

– Key Features

• PNP (+common) output configuration with isolation between I/O and internal circuits
• Four independent output channels with individual LED status monitoring
• Power (PWR), communications (COMM), and error (ERR) indicator LEDs
• Configurable via DIP switches for node number, baud rate, and output HOLD/CLEAR mode selection
• Compact DIN track and screw mounting capability
• ON voltage threshold: 15 VDC min.; OFF voltage: 5 VDC max.; OFF current: 1 mA max.

– Typical Applications

Remote solenoid and valve control, distributed sensor interfacing, multi-station automation networks, and centralized device switching where CompoBus/S integration is required.

– Compatibility & Integration

Fullly compatible with OMRON CompoBus/S systems supporting high-speed serial communications. When driving inductive loads (solenoids, relays, valves), ensure loads include integrated back-EMF suppression diodes or provide external protection. Total load current must not exceed 0.3 A per point.