The DSS-2 is a two-channel electronic speed switch designed for use on engine applications where it can perform a variety of speed related functions such as starter motor disable and engine overspeed protection. The DSS-2 monitors engine rpm via a magnetic pickup (MPU) input and controls two independent relays. Once engine speed exceeds the user-selected speed setpoint, the relay will go to the designated set condition. DSS-2 has two multi-turn potentiometers for speed setpoint adjustment. A serial interface is provided for additional adjustments with the All-purpose Calibration Tool (ACT).
DSS-2 can be re-configured with the ACT to act as a glow plug controller or engine autocrank controller.
Essential details：8800-1001 DSS-2 Two-Channel Digital Speed Switch
The DSS-2 is a two-channel electronic speed switch designed for use on engine applications where it can perform a variety of speed related functions such as starter motor disable and engine overspeed protection. The DSS-2 monitors engine rpm via a magnetic pickup (MPU) input and controls two independent relays. Once engine speed exceeds the user-selected speed setpoint, the relay will go to the designated set condition. DSS-2 has two multi-turn potentiometers for speed setpoint adjustment. A serial interface is provided for additional adjustments with the All-purpose Calibration Tool (ACT).
DSS-2 can be re-configured with the ACT to act as a glow plug controller or engine autocrank controller.
Intended Usage
The DSS-2 is intended as a sub-system for integration into construction/commercial and industrial engine systems by original equipment manufacturers and industrial plants. It is not intended for consumer or on-highway vehicles or for use by the general consumer/public. Typical applications include generator sets, compressors, construction machinery and farm vehicles.
8800-1001
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8800-1001Â DSS-2 Two-Channel Digital Speed Switch
DS
S-2 has thirteen Euro-style screw terminals for:
Battery Positive and Negative (9-30 Vdc). Reverse voltage protected
Two form-C relays (10A continuous). Independent Common (C), Normally Closed (NC) and Normally Open (NO) contacts are provided. DSS-2 is factory programmed for standard relay logic (relay de-energized below set speed), but may be modified with the ACT for reverse relay logic (relay energized below set speed). External diodes should be added for transient suppression with inductive loads.
Magnetic Pickup (MPU) Positive and Negative (2 Vac minimum at 1000 Hz). The controller is factory programmed for 2500 to 5000 Hz. This range may be modified with the All-purpose Calibration Tool (ACT) to cover 10-10,000 Hz or operate in units of rpm.
Reset Switch Input (RST): A switch to battery positive switch input is provided for manual reset functions. DSS-2 is factory programmed for automatic reset at 80% of set speed, but may be modified with the ACT for manual or latched reset.
Engine Protection Switch Input (EP): A switch to battery positive switch input is provided for connection to external engine protection devices.
Verify Switch Input (VER): A switch to battery positive switch input is provided for a verify function. Activating this switch will reduce both channel set frequencies to 70% of their normal values.
Use insulated, automotive grade wiring (minimum 18 AWG or 1 mm 2 ) for all connections. Shielded wiring is recommended for the MPU.
To use the external connections:
Loosen the terminals with a small blade screwdriver.
Strip wire.
Insert wire into terminal hole.
Tighten terminal with a small blade screwdriver.
Refer to Figure 2. Use proper wire gauges (18 AWG/ 1 mm 2 minimum). All wire insulation should be appropriate for engine applications. Terminations must be impervious to moisture to prevent shorts and corrosion.
Use of convoluted tubing, conduit, or other wire shielding is recommended to minimize the likelihood of mechanical damage to wires. Avoid routing wires near sharp edges or near locations that can cause the wires to be pinched or damaged.
1 Year Warranty
