Hi all,
i have a problem with the above card, my rack has two of them and the same issues!
In Channel 0 and 1 on both cards i have 2 wire sensors which read correctly, the - from sensor is connected to I+ and M- is to ground.
Channel 2/3 are deactivated.
Channel 4/5/6/7 are 4 wire sensors. When i connect these the PIW reading from the other channels go funny.
I have confirmed each individual channel by inputting 4-20ma and its perfect.
I have also checked the sensor mA with a multimeter in line and confirm they all read a value true to the sensor position.
To rule out 2 wire and 4 wire messing the card i have moved all the 4 wire onto 1 card and deactivated all channels except 0. when i connect 4-20ma simulator i get 0 - 27648 but when i connect the first sensor i get 864 even though its sending 19.56mA to the card. please see picture
Im confused by this behavior.
i have a problem with the above card, my rack has two of them and the same issues!
In Channel 0 and 1 on both cards i have 2 wire sensors which read correctly, the - from sensor is connected to I+ and M- is to ground.
Channel 2/3 are deactivated.
Channel 4/5/6/7 are 4 wire sensors. When i connect these the PIW reading from the other channels go funny.
I have confirmed each individual channel by inputting 4-20ma and its perfect.
I have also checked the sensor mA with a multimeter in line and confirm they all read a value true to the sensor position.
To rule out 2 wire and 4 wire messing the card i have moved all the 4 wire onto 1 card and deactivated all channels except 0. when i connect 4-20ma simulator i get 0 - 27648 but when i connect the first sensor i get 864 even though its sending 19.56mA to the card. please see picture
Im confused by this behavior.