Technical Specifications Total Channel Quantity: 8 channels mixed digital input / relay output Relay Contact Type: Form‑A high‑speed mechanical relay contact Contact Rated Switching Capacity: 5A @250V AC /5A @30V DC Digital Input Operating Voltage: 48‑125 VDC Back‑plane Bus: UR series internal high‑speed system bus Module Slot: Single‑slot UR chassis plug‑in module Operating Temperature: ‑40℃ ~ +70℃ Storage Temperature: ‑50℃ ~ +85℃ Relative Humidity: 5%‑95%, non‑condensing Certifications: UL, CE, IEC61010 substation automation compliance
Functional Features 8‑channel mixed configurable digital input and high‑speed relay output channels. High‑speed relay contact is suitable for fast‑response protection‑trip signal output. Per‑channel comprehensive hardware self‑diagnosis monitors input circuit and relay‑contact health status. High‑speed real‑time status data and control‑command interaction with main CPU via back‑plane bus. Front‑panel LED indicator lamps for direct observation of each channel real‑time state. Support hot‑swap operation under system running status. Channel‑function assignment completed by official UR configuration software.
Application Scenarios High‑speed protection trip‑signal output for substation protection relay. Circuit‑breaker and disconnect‑switch position‑status signal acquisition. Fast‑response protection interlock‑logic signal expansion for UR series protection system.
Structural Characteristics Standard single‑slot metal plug‑in housing compatible with UR series chassis slot dimension. Front‑panel LED indicator array corresponds to each I/O channel operating state. Rear‑side golden‑finger back‑plane connector for bus communication and module power‑supply input. Internal integrated electromagnetic shielding structure to suppress substation‑site strong electromagnetic interference.
Working Principle Field discrete equipment‑status signals are transmitted to front‑side terminal block. Signal conditioning circuit converts raw field signal into recognizable digital‑logic signal. Main CPU issues high‑speed control instruction through back‑plane bus to drive on‑board high‑speed relay contact to complete trip‑signal output.
Installation Requirements Insert module into reserved expansion slot of UR series standard chassis. Complete reliable chassis protective grounding complying with substation grounding technical specification. Field‑signal wiring shall adopt shielded twisted‑pair cables, separate routing path from high‑voltage power cables.
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