Product Highlights
The SPR-44 handles high-speed pulse rates up to 72,000 pulses per hour in 3-Wire mode, with output pulse timing that exactly mirrors the input. A built-in transformer-isolated +13 VDC sense voltage supply with a common “Kin” return serves all four channels, enabling flexible multi-meter wiring configurations including open-collector transistor and open-drain FET solid state pulse initiator inputs.
Individual red and green LED indicators on each input channel provide real-time status across all four channels at a glance. Built-in MOV transient protection and individually fused “K” output leads on all four channels ensure reliable operation under demanding field conditions.
Features
The SPR-44 provides four fully independent isolated pulse channels with built-in pulse conversion capability in a single compact enclosure.
- Four isolated solid state Form C (K, Y & Z) dry contact outputs from four field-selectable Form A or C inputs
- Built-in pulse conversion mode per channel — converts Form C (3-Wire) to Form A (2-Wire) or Form A to Form C while maintaining pulse value
- Inputs parallelable for flexible pulse splitting configurations
- High-speed operation up to 72,000 pulses/hour (3-Wire) or 36,000 pulses/hour (2-Wire)
- Compatible with electromechanical, semiconductor, open-collector, and open-drain FET pulse initiator inputs
- Output pulse timing mirrors input pulse width exactly
- Built-in transformer-isolated +13 VDC sense voltage for all three input channels
- Solid state contacts rated at 125 VAC/VDC at 100 mA, 800 mW maximum
- Built-in MOV transient protection on all relay contacts
- Fused "K" output leads (1/10 amp, 3AG) on all six output channels
- 3,750 Vrms input/output isolation voltage
- Individual red and green LED status indicators on every input and output channel
- Available in 125 VDC (SP2), 12 VDC (SP12), and 15–48 VDC (SP13) input voltage options
Four-Channel Quad Isolation Relay
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