Hi,
I need help to connect 2 multiplexer with 1 datalogger CR1000
can you help me please?
Best regards
Jeicy
I've done this with three AM 16/32B muxes. You can use a single clock line (I used C4) daisy chained between the muxes and use multiple reset lines (perhaps C5 and C6 in your case), one tied to each of the muxes. My install has been running for ~3 years with no issues.
* Last updated by: RyanSmith on 9/10/2013 @ 7:30 AM *
Take a look at SCWin (ShortCut). It supports multiplexers with certain sensors. Look under Devices at the bottom of the "Sensors and Devices" list, Step 3.
thanks for the quick response,
I should point out what I have.
I have 18 229L sensors (Heat dissipation Water Matric Potential Sensors). Additionally, I must connect a WXT520 weather sensor + a pyranometer (CS300) + a sonic ranging sensor (SR50A). I have 2 multiplexer's AM16/32B and a Channel excitation current module (CE8) and a CR1000 datalogger.
until yesterday I connect a wx520 and CS300 and CR50A and 16 229L (via CE8 and multiplexer) to datalogger.
installation manual suggests connecting the 229L sensors as follows:
AM16/32 12v ------ CR1000 12V
AM16/32 GND ------ CR1000 G
AM16/32 CLK ------- CR1000 control port (C2)
AM16/32 RES ------- CR1000 control port (C1)
AM16/32 COM ODD H ----- CR1000 differential (1H)
AM16/32 COM ODD L ----- CR1000 input chanel (1L)
AM16/32 COM GROUND ----- CR1000 ground
AM16/32 COM EVEN H -----CE8 output
AM16/32 COM EVEN L -----CE8 ground
CE8 12V ----- CR1000 12V
CE8 gnd ----- CR1000 G
CE8 CTRL ----- CR1000 control port (C3)
the other sensors were connected in the following way
a) WXT520:
WXT520 Power (Brown) ---- CR1000 12V
WXT520 Power ground (Clear) ---- CR1000 G
WXT520 SDI-12 Signal(Blue) ---- CR1000 C5
WXT520 SDI-12 Signal(White) ---- CR1000 C5
WXT520 data ground(Green) ---- CR1000 G
b) CS300:
CS300 Signal (Red) ---- CR1000 SE Analog (7)
CS300 signal reference (Black) ---- CR1000 G
CS300 Shield (Clear) ---- CR1000 G
c) SR50A:
SR50A Power Ground (Black) ---- CR1000 G
SR50A Power (Red) ---- CR1000 12V
SR50A SDI-12 signal (Green) ---- CR1000 C7
As you can see, I have no "C" Channels available to connect the second multiplexer
Necessarily I shall add a second CR1000?
thanks for the help
Jeicy
to complement,
channels C4, C6 and C8 are available
Can I connect the CLK wire to C6?
Jeicy
If I understand your last comment, you have a total of (3) unused control ports. If this is the case then you can use any of them for clock or reset so long as they are not tied up with another set of control ports (as with C1-C3 with SDM devices or the paired ports for COM1 - COM4).
So yes, C6 can be the CLK port and the others can be the reset ports (1 per mux). You'll also need to share power to the muxes.
thank you very much for your help
the forum is excellent, I recommend you to my contacts
best regards,
Jeicy
Hi Jeicy
I am a relative newbe to programming in CRBasic but i believe that you could free up one of your C ports by reading all your SDI 12 sensors from the same C port (you would have to assign unique addresses for your SDI 12 sensors).
Morning Jeicy,
I see your message in this forum.
I like to get on 2 Am16/32 to cr1000 in my station.
I hoppe have to the script for wiring 2 AM16/32 to cr1000 with 6 cs616 for multiplxer 1 and 6 T108_C for multiplexer 2.
Best regards!
vik
Hi there,
It is a pretty old post but it gives me the occasion to ask a very silly question : when you share power to the muxes (two wires in the same 12V channel) does it create any problem with the amperage ? Does it affect the muxes in any way ? (as the current intensity is lower for these two muxes than for the others having a proper 12V + G each)
(As the power supply is very strong I suppose it doesn't, but just to confirm..)
Thank you by advance
A.