Specifications Model Series: SD Series Digital Indicating Alarm

Primary Function: To display a process variable (from a 4-20mA sensor) and provide multiple alarm setpoints for process control or safety shutdown.

Display: 4-digit, 0.36-inch (9.2mm) High, Red LED display. Bright and easy to read from a distance.

Input Signal: 4-20 mA DC (Current input from a transmitter, e.g., pressure, level, temperature transmitter)

Output Signal: 4-20 mA DC Retransmission Output. This allows the displayed value to be sent to another device like a PLC, recorder, or DCS.

Alarms: 4 independent alarm setpoints. Each alarm can be configured for high/low limits and will activate its own relay.

Control Outputs: Typically 4 DPDT (Double-Pole Double-Throw) Relay Outputs (one for each alarm). These relays can be used to activate lights, horns, valves, or pumps when an alarm condition occurs.

Key Option (-2TN):

Dual Display: Likely has a secondary display for showing alarm setpoints or other values.

NEMA 4X Rating: The front panel is rated for watertight and dust-tight environments, suitable for harsh industrial panels.

Power Supply: Typically 100-240 VAC or 24 VDC (the exact specification may require the full model code).