DROK 4-20mA Generator, Adjustable Signal Generator, DC 0-10V 0 4-20mA Current Voltage Analog Simulator for Value Adjusting PLC Panel LED Testing

Works as advertised, great way to check plc inputs, verify with a fluke 771, the output is accurate.

This is a nice tool, and inexpensive. It can be powered by a 24VDC power supply, or I used 2 9V batteries in series. There is one terminal for V-Out, one for I-Out, and one for A- Com. If you do not know what any of these terms mean, this is not the device for you. There are capabilities to edit patameter set for both current and voltage. Another reviewer posted snip of settings and procedure. I used these to get I-Out from a 4-20mA down to a 0-20mA output. Relatively small device, great for portability. Approximately 4" x 2" x 2" I will probably locate a hard case and line it with foam pad to store device.

I was using this to simulate the signal from a scale. At first it worked OK. Using my SIMPSON 260 I could see the signal was not quite as accurate as I wished but well within tolerance. Within a few days, the signal deteriorated until it was useless. We are a panel and programming shop. So I turned it off and said that's it. Luckily the main job I bought it for was done. But I cannot recommend this product. They are using cheap electronic components that quickly overheat. Probably the lowest of quality components. As the unit operates throughout the day, the signal gets worse. Probably due to heat from the device itself. The meter product is built nicely. After leaving it off for a week, I tried it again and the signal was fine (see my 2 pictures reading the output on a 4-10mA scale). But I will not rely solely on this meter. It is useful as a quick check in the field. Needs a 24vdc power supply to operate it. Do not leave it on if you want it to work right. And be sure you check it.

I bought this to supplement my learning of PLC Programming. I have a Micrologix 1100 which has two analog inputs that accept a 0-10v signal, and this unit fit the bill. I tested it with a digital multimeter first and overall the display is fairly accurate, certainly good enough for the price. Connected to the PLC, it does exactly what I need. I also tested the 0-20mA output and sure enough, it works also. I'm sure if I continue with PLCs I'll find more uses for it. It's good for the price!

So far this unit has performed very well. I checked the accuracy right out of the box with my Fluke 87 and it was right on! It does have a way to adjust both the voltage and milliamp output on the back of the board. I also put 2 - 9 volt batteries in series for the power supply and they fit inside the box. The PC board also has a pin out for a power switch which I added to turn off when not in use. I have used it for a week now, I experiment with vfd’s and other analog control devices and then put together installation and programming instructions. This is as good as any signal generator out there!

This is a pretty good device and it gets the job done. I used it to test 4-20 mA current loop readers. It could be better, and it's missing a few features other similarly-priced products have. If you want more features, operating instructions, or guidance on how to use the product, you may want to keep shopping. It needs external power. I used 24VDC connected to the 24V and 0V(GND) terminals. I'm measuring current (example 4-20mA current loop) so I connected my input device to the ACOM(-) and IOUT+ terminals. FYI, research suggests 0V(GND) and ACOM are sharing the same ground. When switching the display from V (voltage) to A (current), the output begins at 4.00 mA. Turning the dial increments/decrements in units of 0.1mA, and tops out at 20.0mA. I may need to research further, but the unit doesn't appear to allow output below 4.00mA or above 20.0mA, which can be useful to test under and over-current detection. Features I'd like to see: 1. self-powered, perhaps by USB-charged battery 2. output variable beyond the typical 4-20mA limits 3. with connection to a 4-20mA output source, a means to READ and display the mA value detected.

I needed to prove something at work. I had a rudimentary PLC that sends a 4 to 40ma signal. It used a potentiometer to measure fuel level, and the 4 to 20ma signal output is proportional to that input. I had an unused Analog input on a Caterpillar 4.2 panel. The panel used a 0 to 5Vdc input. Using a 250 ohm resistor, I was able to obtain a volt drop across the resistor in the 1 to 5Vdv range. Using this signal generator, I was able to emulate the PLC's output signal and program a CAT 4.2 panel to read fuel level with a 4 to 20ma signal. I had to prove it on our shop's gen before we could suggest it as an upgrade to any customer's gensets. The device is not accurate when it is shipped. BUT its has trim pots on the backside. These are just to make the display screen read the same as the output. I have not really messed with them, as inacurate display readouts were not something I needed to worry about because I was watching with my Fluke 87V. My needs were satisfied, the output is adjustable, and the price was excellent. If I dabbled more in the world of automation, then I might need something more. But then again, maybe not.

Using a couple of these to simulate analog inputs on a PLC. Works perfectly. Have not tried the 0-10V functionality as 4-20mA is all I ever use. I really like that this device is in a plastic case. Everything feels solid! I do like that this is "hackable" to be used with a battery. I don't need this but it is nice to have the option. Wire this up to an M12 sensor cable and this can be used out in the field to test wiring as well. Good product and a solid buy if you need to simulate some analog sensors for programming.

Fácil de usar , económico y ayudamucho en las calibraciuobnes en banco y en campo.

I needed this to generate a 0-10volt analog control signal to test some ECM motors. It works perfectly. My only comment is that it should state that a 24volt DC input voltage is required. Fortunately the ECM motors I was testing required 24volts to power so I used the same transformer to power the signal generator. The LED display is also very useful and the fine adjustment is as well. A great little device for the price, if you need such a thing.

I use two 9-volt batteries in series to power it. Works well for setting up 4-20ma & 0-10v actuators

If you are looking for a low cost 4-20 mA signal generator, look no further. This provides values from 4 - 20 mA that are dead on to a Fluke meter.. Need it powered - check out the other reviews with instructions to power it with 2 x 9-volt batteries - very simple to do. It does exactly what you expect/need it to do.