Astronics / EADS / Racal 1250-15A Relay Driver Module

The Astronics/EADS/Racal 1250-15A is a 24-channel relay driver module engineered for external relay control within the Racal 1250 Universal Switch Controller system. It delivers current-sinking outputs paired with confidence-testing sense inputs, supporting both internal +13V DC and external supplies up to +30V for relay coil actuation. The module integrates directly into automated test equipment and applications across aerospace, military, and industrial domains. ## Technical Specifications • Output Drivers: 24 current-sink channels • Sense Inputs: 24 feedback channels for confidence testing • Internal Supply: +13V DC at 1.7 A (fused) • External Supply: Up to +30V DC • Output Voltage (Off State): 30 V maximum • Output Voltage (On State): 1.6 V maximum • Per-Channel Current: 350 mA @ 100% duty cycle • Group Current Limits: 1.0 A per group (CH00–CH07, CH08–CH15, CH16–CH23) • Total Module Current: 3.0 A (external supply) • Sense Input Impedance: 6.8 kΩ • Sense Input Voltages: 9.30 V (de-energized), 0–1.6 V (energized) ## Key Features • Three DB25 connectors carrying output drivers, sense inputs, supply voltage, and return lines • Break-Before-Make (BBM), Make-Before-Break (MBB), and Immediate (IMM) switching modes • Command syntax supporting OPEN, CLOSE, SETUP, PSETUP, RESET, and PDATAOUT operations • Modular plug-in card design compatible with 1250 chassis (slots 1–5 or 1–14) • Scalable architecture for complex multi-channel switching requirements ## Typical Applications • Automated test equipment (ATE) environments • Aerospace and defense test systems • Industrial relay control and signal switching • Systems requiring external relay actuation with real-time feedback validation ## Compatibility & Integration The 1250-15A operates exclusively within the Racal 1250 Universal Switch Controller framework. Slot-based configuration and command-driven control enable integration into hierarchical test architectures without external interface modules.