ST-LCR2

RDL ST-LCR2 - Logic Controlled Latching Relay

The RDL ST-LCR2 is a logic-controlled latching relay module designed for professional AV systems where momentary pulses are used to alternately toggle relay contacts on and off. It features double-pole, double-throw (DPDT) dry contacts and an LED indicator to show relay status.

The relay can be triggered by a push-button, switch, logic circuit, or open-collector output. Each high-to-low pulse toggles the relay state. The ST-LCR2 also includes an open-collector slave output for driving remote indicators or additional relays such as the ST-LCR1.

Functionality

• Latching (toggle) switching - changes state with each pulse
• Control via switch, push-button, logic circuit, or open-collector
• LED indicator for relay status
• Slave output for indicators or additional relays
• Compatible with RDL STICK-ON® systems
• 24V DC power - ground-referenced configuration

Features

• Contact type: DPDT (double-pole, double-throw)
• Max switching power: 60W (220V DC, 125V AC, 2A)
• Control inputs:
  • SLAVE: ground-activated
  • 5V+: 3.5-12V DC pulse (high-to-low)
  • 24V+: 12-35V DC pulse (high-to-low)
• Control output: open-collector 25 mA (for indicators or slave LCRs)
• Dimensions: 0.7 in (H) x 3 in (W) x 1.6 in (D)
• Operating temperature: -10°C to 55°C
• Power requirement: 24V DC @ 50 mA (ground-referenced)

The RDL ST-LCR2 is a compact and reliable solution for AV integrators who require flexible latching relay control for devices or signal paths in audio/video systems.