Hello,
I bought two YL2-1 Lighting Splitter Cable (Bulk Reef Supply PO# 1102329907 SKU 231939) to get two separate 1-10V signals from the yellow port 1/2.
I only get #1 output signal on both ports.
I tested as follows to verify the signal output.

1. Pump 1 Constant flow 40% on Extra, Stream Group 1
2. Pump 2 Constant flow 100% on Extra, Stream Group 1
3. Assigned Pump #1 to Channel #1 of 1-10V Interface and shows about 40% of output range on GCC
4. Assigned Pump #2 to Channel #2 of 1-10V Interface and shows about 100% of output range on GCC
5. RJ12 cable on Yellow port 1/2 -> Splitter -> 1) to #1 PropellerControl-2.1 speed control module and 2) #2 PropellerControl-2.1 speed control module
4. The output Voltage form the both speed control modules follow the % setting of Stream Pump #1 and Channel #1 of 1-10V interface.
* I measured the output voltages of speed control modules with a precision digital multimeter.

I am intending to control two third-party Pumps having 1-10V interface thru a L-port P-port Brakout box.
I understand YL-2 splitter cable is for this purpose to separate two signals from one RJ12 port.
Please help me to indicate what I have done wrong.
Thanks in advance for any help.

Son in Seoul Korea