URM 37 v4 TTL level

userHead Account cancelled 2018-03-26 21:33:48 556 Views0 Replies
I purchased a URM37 v4 and it works well with RS232. I purchased a FTDI USB to TTL cable (ebay item: 401090868113). It does not work with the URM37 in TTL mode which makes me think the URM37 mode is 5V. Where can I find these details for this product?