DB37F Connectors

Analog I/O Modules

Each pair of I/O modules (A and B) is linked to four (4) female DB37 connectors (I/Os) on the back of the chassis:

• The first two connectors (left to right) represent channels from Group B, which are linked to the conditioned channels from the rear I/O module.

• The last two connectors (left to right) represent channels from Group A, which are linked to the conditioned channels from the front I/O module.

• If the front I/O module (A) is an analog module (DAC or ADC):
  • The 16 channels are on connector A-P1
  • Connector A-P2 does not carry any signals.
• If the back I/O module (B) is an analog module (DAC or ADC):
  • The 16 channels are on connector B-P1.
  • Connector B-P2 does not carry any signals.

Digital I/O Modules

Each pair of I/O modules (A and B) is linked to four (4) female DB37 connectors (I/Os) on the back of the chassis:

• The first two connectors (left to right) represent channels from Group B, which are linked to the conditioned channels from the rear I/O module.

• The last two connectors (left to right) represent channels from Group A, which are linked to the conditioned channels from the front I/O module.

• If the front I/O module (A) is a digital module (Din or Dout):

  • The first 16 channels (00 to 15) are on the connector A-P1.
  • The next 16 channels (16 to 31) are on the connector A-P2.

• If the back I/O module (B) is a digital module (Din or Dout):
• The first 16 channels (00 to 15) are on the connector B-P1
• The next 16 channels (16 to 31) are on the connector B-P2

All signals are represented by a positive-negative pair that are always available on the connector pins, for example: for channel 08 : (08+, -08)

Positive/Negative Signals Connection

• For a single-ended output, the negative conductor is connected to Ground
• For a differential output, the positive and negative signals are on the connector
• For a differential input, the connection must be between the positive/negative pair
• If the input is single-ended, user ground must be connected to the negative side of the pair

RJ45 Connectors

Each RJ45 monitoring panel on the front of the OP5705-IO I/O expansion unit connects to front and back I/O modules.
The following images illustrate how the I/O modules are linked to the connectors.

OP5705-IO I/O expansion unit - Rear (DB37)

RJ45 Channel Assignments

Each I/O module is assigned two columns of RJ45 connectors.
Each column represents a series of channels, divided into 4 channels per jack, as shown in the figure below.