Series-784

Supported Applications

The Dwyer Series 783 & 784 Ice Cube Relays are full-featured relays designed to handle loads up to 15 amps for AC or DC circuits. The series is utilized in HVAC applications and general automation control where a flag status indicator and an LED status lamp provide visual confirmation of relay activation.

Operating Conditions & Performance

The Series 784 operates within an ambient temperature range of -40 to 131°F (-40 to 55°C) and supports storage temperatures from -40 to 185°F (-40 to 85°C). Electrical ratings are specified as 15 A @ 120 VAC 50/60 Hz; 12 A @ 277 VAC 50/60 Hz or 28 VDC. The operating and load voltage range covers 24-240 VAC; 24 VDC.

Performance metrics include an electrical cycle life of 100,000 cycles and a mechanical cycle life of 10,000,000 cycles. Power consumption for the Series 784 is listed as 1.5 VA; 1.5 W.

Configuration Options

The series offers configurable switching operations and input voltages to match specific control requirements.

• Switching Operation: Available in 3PDT or 4PDT configurations.
• Housing Material: Plastic polycarbonate construction.
• Electrical Connection: Silver alloy plug-in contacts.
• Status Indicators: Features a flag status indicator and an LED status lamp. The push-to-test button is color-coded to differentiate between AC and DC actuated models, with a removable lock-down lever available to hold the test button in place.

The series supports various input voltages as documented in the model chart:

• 24 VAC 50/60 Hz (e.g., Model 783XCXMMAL-24A, 784XDXMMAL-24A)
• 120 VAC 50/60 Hz (e.g., Model 783XCXMMAL-120A, 784XDXMMAL-120A)
• 24 VDC (e.g., Model 783XCXMMAL-24D, 784XDXMMAL-24D)

Approvals: The relays carry CE, CSA, cULus, and cURus compliance.

Key Product Differences

The Series 783 & 784 differ primarily in physical dimensions and power consumption characteristics while sharing the same electrical rating envelope. The Series 783 measures 1-3/32 [27.90] depth, 1-7/32 [30.80] height, and 1-37/64 [40.00] width with a weight of 2.1 oz (60 g). The Series 784 measures 1-17/32 [39.10] depth, 17/64 [6.60] height, and 1-19/32 [40.60] width with a weight of 2.8 oz (80 g).

Power consumption varies by series: Series 783 consumes 1.5 VA; 1.4 W, while Series 784 consumes 1.5 VA; 1.5 W.

Available Accessories:

• Socket for 784 series relay (Model 70-784D14-1)
• Protection modules, MOV suppressor, 24 VAC/VDC (Model 70-ASMM-24)
• Protection modules, MOV suppressor, 120 VAC/VDC (Model 70-ASMM-120)
• Protection modules, protection diode, 6 to 250 VDC (Model 70-ASMD-250)