Digital guide
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Sigmatek 05-009-084
Product Name: CD3 series 8-channel relay digital output module
Introduction: Relay output module for Sigmatek CD3 controllers, used to switch AC/DC loads such as solenoids, motors, lamps, alarms and auxiliary devices. If the local system uses this code as a communication expansion module instead, request the CD3 variant name before applying these parameters.
Detailed content
Technical Specifications: 8 relay outputs, SPDT changeover; resistive load 250 VAC/2 A and 30 VDC/2 A; inductive load 250 VAC/1 A at cos φ 0.4 and 30 VDC/1 A at L/R 7 ms; contact material AgSnO₂; optical isolation 500 VDC; typical switching 5 ms, maximum 10 ms; 24 VDC from CD3 backplane; maximum consumption 1.2 W; internal CD3 bus 1 Mbps; IP20; 0°C to 55°C; 120 x 90 x 25 mm; DIN rail or screw mounting; CE/UL 508/RoHS.
Functional Features: Per-channel LED status, internal flyback/commutating diode for coil and inductive suppression, contact-state feedback via internal bus, short/load diagnostics according to CD3 configuration.
Application Scenarios: Conveyor motor control, solenoid valves, indicator lights, alarm sirens, pump start circuits and general AC/DC switching in CD3 systems.
Material Composition: ABS housing UL94 V-0; pluggable screw terminals up to 1.5 mm²; sealed electromagnetic relays; FR-4 double-sided PCB.
Structural Characteristics: Single-module width with DIN clip, front channel labels showing NO/NC, rear CD3 backplane connector.
Working Principle: The CD3 controller sends output commands over the internal bus; the module energizes the corresponding relay coil, closes the SPDT contact and feeds load power; isolation separates field wiring from backplane logic.
Installation Requirements: Install in CD3 rack/backplane; use 0.5 to 1.5 mm² output wiring; provide external RC snubber for heavy inductive loads where recommended; follow maximum modules per rack.
Usage Precautions: Never exceed contact voltage/current ratings; avoid capacitive inrush above specified limits without external protection; allow minimum relay repeat interval for inductive loads; verify NO/NC wiring before energizing.
