1. Do you have a signal conditioner that will source up to an 800 mA output?
No. The highest outputs available are 100 mADC non-isolated (API 4010 G) and 50 mADC isolated (API 4300 G). The API 4300 G EXTSUP will sink up to 200 mADC with an external power supply.
2. We have a 4-20 mA input and require 4 set points at the output. Do you have a product for this?
Yes, you can connect 2 of our API 1020 G units in series in the 4-20 mA input loop since the input impedance for current is 50 ohms and the drop is very low.
3. I have an API 4385 G, with an input range of 12-20 mA and an output range of 4-20 mA. How do you set the offset so that when the input is 12 mA, the output will be 4 mA?
Percent offset = Minimum Input Value / Input Span
For this example it is 12 / 8 = 1.5 x100 = 150%. The offset chart with the API 4385 G allows for up to 100% making this is a special. Set switches B, D, E to 3, 4, F.
4. Do you have a DC-DC transmitter that will accept an input of ±5 VDC and provide an output of ±40 mA, ideally a ±20 mA minimum?
No, the maximum bipolar output we can provide is ±6 mA and possibly ±10 mA on the API 4300 G BP.
5. Can you provide a transmitter that will accept a 4-20 mA input and split the output to give two outputs that would be 4-20 mA for output 1 and 20-4 mA for output 2?
No. You can use two transmitters in series in the input loop to give the two outputs. Select the API 4380 G for the 4-20 mA output and an API 4385 G for the 20-4 mA output.
6. Do you have a 4-20 mA DC transmitter that can operate a load of 1800 to 2000 ohms?
The API 4300 G with a 4-20 mA output can operate a maximum load of 1000 ohms maximum with its 20 Volt compliance. To control a load of 1800-2000 ohms, you can use the API 4300 G EXTSUP. A 42 Volt power supply is required for the 1800 ohm load, and a 48 Volt power supply is required for the 2000 ohm load. The power supply voltage can not be less than these requirements or there will not be enough power to reach 20 mA. Also, the power supply can not be more than these requirements or the API 4300 G EXTSUP will be damaged.
7. We need a 0-10 VDC input with a 0-10 VDC output and be able to adjust the output down to any lower value from the linearized output, for example, if the input is 8 V, then the output can be 8 V or less. Is this possible?
Yes. Use the API 4300 G set up for 0-10 VDC in and 0-10 VDC output with a 10K ohm potentiometer at the signal input. One side of the pot would wire to the (+) signal, the other side of the pot. would wire to the (–) signal and terminal 6, then wire the wiper from the pot to terminal 5 of the module.
8. Do you have a signal conditioner that will accept a 0-5 VDC input and provide an output of 0-500 mVDC?
Yes, the API 4300 G with these ranges specified at the time of ordering.
9. What is the output impedance of the API 4380 G for the 4-20 mA mode?
The output drive circuit uses a MOSFET which is an active device with an impedance of at least 100 K ohms or greater in the current mode.
10. Can we use the API 4300 G for an input signal of 500 VDC with the negative side of the signal floating and not at true ground?
It depends. The socket is rated to 600 VDC maximum. So with true ground on the socket at the output side, no other point on that socket can be above 600 VDC. Even though the API 4300 G is isolated and the input will accept the 500 VDC differential between terminals 5 and 6, the socket rating is between two points anywhere on the surface.
11. We would like to use the API 4380 G DF for the 100 microsecond response time but need an input range of 0 to 25 mV. Can you do this?
Yes, however the unit will be fixed for that input and the specified output. It will not be field selectable. The new part number will be API 4300 G M80. The API 4300 G does not offer a response time as fast as the API 4380 product.
12. What is the fastest response time that is available in the API 4385 G DF?
This version offers a response time of 5 milliseconds.
13. What is the maximum current allowed for the 18 VDC unregulated loop power supply and what does the waveform look like?
The maximum current is 25 mA and the waveform is a filtered full wave rectified +18 V with a maximum ripple of 1.5 V p-p.
14. We are using a DCS system that requires a 4-20 mA isolated input which also provides 24 VDC to power the loop. Do you have an isolated signal conditioner that will sink the output loop?
Yes, the API 4300 G EXTSUP. This module controls the 4-20 mA output loop but derives the power from an external source. The connection from the output of the API 4300 G EXTSUP to the input of the DCS requires no additional components (resistors) other than the connecting wires.
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