Is the receiver the only difference between the ST100 and the ST200?
Yes, the decisive difference is the receiver. In both sets the remote control is Li-Po rechargeable and IP67, the range in open areas is approximately 150 m, and the charging input is an AXI-Link 3-pin connector. The ST100's receiver is the LF100R panel-mount type (2x10A on 2 channels, 12/24V DC or 220V AC); the ST200's receiver is an IP67 outdoor type in a sealed enclosure.
The remote control side is the same in both sets: a Li-Po rechargeable, IP67-protected transmitter and an AXI-Link 3-pin industrial charging connector. Open-area range is approximately 150 m in both.
- ST100 receiver: panel-mount type. In the 2-channel version the receiver is the LF100R, offering 2x10A relay outputs and 12/24V DC or 220V AC supply. The ST100 also has a panel-mount receiver option with 4 relay outputs; the model code and relay current rating of this variant are not stated in the product data.
- ST200 receiver: IP67 outdoor type, sealed enclosure, cable gland entry. 2, 4 and 6 channel options are available.
So the choice is determined by where the receiver will be mounted. If the receiver is going inside an already protected electrical panel, the ST100 is enough; if there is no panel and the receiver will be mounted on the machine body, on a mast or out in the open, the ST200's IP67 enclosure is required.
The supply voltage and relay current rating are not stated in the ST200 records; do not carry these values over from the ST100. Confirm the electrical values for the ST200 from the technical specifications on the product page and from the user manual before ordering. If your channel requirement goes up to 6, only the ST200 series offers that option.
The full topic: Wireless Crane Remote Control Selection Guide