Pololu Basic SPDT Relay Carrier with 5VDC
- үнэ: 19,000 төг
Pololu Basic SPDT Relay Carrier with 5VDC Relay (Partial Kit)
Pololu item #: 2481
The Pololu basic relay carrier modules allow simple control of a single-pole, double-throw (SPDT) switch from low-voltage, low-current control signals. This item includes the basic carrier PCB along with an Omron G5LE-14-DC5 5 V relay, 5.0 mm terminal blocks, and 0.1" male headers in straight and right-angle versions. Surface-mount components are pre-assembled on the PCB, but the through-hole components are not installed. The included power relay is rated for up to 10 A under most conditions.
|Size:||1″ × 1.15″ × 0.1″|
The Pololu basic relay carrier modules make it easy to control a single-pole, double-throw (SPDT) switch from low-voltage, low-current control signals. The modules are available with 5 V and 12 V power relays—Omron G5LE-14-DC5 and G5LE-14-DC12 (1MB pdf), respectively—and they are available pre-soldered or as partial kits that allow greater application flexibility:
The carrier board is available without the relay or connectors for those preferring to use their own relays that have the common “sugar cube” pinout and footprint, and we also offer several dual-relay carrier modules.
The carrier board routes the three relay control pins to 0.1″-spaced pins compatible with standard solderless breadboads and female servo cable connectors. The assembled version of this board has a 0.1″ straight male header soldered to these pins while the partial kit version includes 8×1 straight and right angle 0.1″ male header strips that can optionally be broken into 3×1 pieces and soldered in. The relay switch pins are routed to a set of large pads intended for use with a 3-pin 5mm-pitch terminal block and a set of smaller pads with a 0.2″ pitch, making them compatible with 0.1″ perfboards. The assembled version of this board has a terminal block soldered to these pins while the partial kit version includes a 3-pin terminal block that can be optionally soldered in. The carrier board has four mounting holes that work with #2 or M2 screws.
Advantages over similar products
- – Compact layout
- – Two LEDs to indicate coil actuation
- – Zener diode for fast current decay on relay coil
- – Specification of electrical routing clearance rules on relay switch nodes
Using the relay module
The switch portion of the relay is accessible on one side of the board while the control pins are routed to the other. The relay coil is powered by supplying the appropriate coil voltage for your specific relay across the VDD and GND pins, and it is activated by a digital high control signal on the EN pin. The control signal is fed directly to a BSS138 N-channel MOSFET, which in turn actuates the relay coil when the control voltage exceeds approximately 2.5 V, up to a maximum of 20 V (see BSS138 datasheet (92k pdf) for details).
The relay switch terminals COM (common), NO (normally open), and NC (normally closed) are routed on the PCB with a minimum clearance of 60 mils (1.5 mm) from other copper. The copper traces are designed to be at least 45 mil (1.1 mm) from the board edges, though manufacturing variations in the board edges can make those distances slightly lower.
In most applications, the current and voltage ratings for the module will match the ratings of the relay used. Maximum current, maximum voltage, and life expectancy are interdependent; we therefore recommend careful examination of your relay’s datasheet.
Warning: This product is not designed to or certified for any particular high-voltage safety standard. Working with voltages above 30 V can be extremely dangerous and should only be attempted by qualified individuals with appropriate equipment and protective gear.
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