DO Mass Connection Board

Installation notes

The DO Mass Connection Board provides an interface to the DO 32-channel 24 VDC high-side or high-side Plus card used with the 40-Pin Mass Terminal Block in simplex mode or with the Redundant Discrete Output 40-Pin Mass Terminal Block. The DO Mass Connection Board also provides an interface to the DO 8-channel 24 VDC high-side card used with the 16-Pin Mass Terminal Block.
Four DO Mass Connection Boards (the DO Mass Connection Solution) are required to provide the interface to all 32 channels on the DO 32-channel 24 VDC high-side card.
Two 20-pin ribbon cables (one per board pair) connect the DO Mass Connection Solution to the 40-pin Mass Terminal Blocks. Two additional 20-pin ribbon cables connect each pair of DO Mass Connection Boards together, as shown in Figure: Connected DO Mass Connection Boards.
The DO Mass Connection Board provides a relay output to detect termination faults that indicate loss of input power to the board.
When the redundant DO 32-channel 24 VDC high-side Plus card is used with the Redundant Discrete Output 40-Pin Mass Terminal Block and the DO Mass Connection Solution, the card can be configured to detect faults in the termination. Two parameters, T1_FAULT_DETECT (for the ribbon cable connection for channels 1-16), and T2_FAULT_DETECT (for the ribbon cable connection for channels 17-32), can be enabled in DeltaV Explorer for the card. Setting these parameters to True enables detection of the ribbon cable connection between the Redundant Discrete Output 40-Pin Mass Terminal Block and the DO Mass Connection Board, and detection of faults such as loss of power, a missing cable, or a missing Mass Connection Board. You can disable termination-fault detection using a jumper on the board if you need to rewire while a process is running.
Four screw terminals provide the connections for +24 VDC power and ground.
If you are using an external +24 VDC source for a channel, move the fuse for that channel to the FIELD PWR position. Otherwise, leave the fuse in the MODULE PWR position. Refer to the parts locator and wiring diagrams for more information.
The power-input fuse, channel fuses, and relays can be replaced in the field.

Note

Termination fault detection is available only when the redundant DO 32-channel 24 VDC high-side Plus card is used with the Redundant Discrete Output 40-Pin Mass Terminal Block connected to the DO Mass Connection Solution.

Specifications

Table: DO Mass Connection Board specifications
Item	Specification
Power for +24 VDC high-side outputs (optional)	+24 VDC ±10% at 10 A maximum
Control signal current per channel (derived from the DO 32-channel 24 VDC, high-side plus card.)	14 mA maximum
Channel type	Relay output
Number of channels	8
Output channel options and ratings	Isolated relay contacts: 250 VAC/24 VDC maximum at 5 A maximum per channel.⁽¹⁾ +24 VDC high side: 5 A maximum per channel,⁽²⁾ 10 A maximum per board.
Channel relays	Phoenix Contact no. 2961105
Termination fault relay	2 A at 30 VDC maximum
Relay contact ratings	28.8 VDC at 5 A switching current 48 VDC at 0.4 A switching current 250 VAC at 5 A switching current
Isolation	Isolated relay contacts: Isolated at 250 VAC and factory tested to 3000 VDC (channel to system and channel to channel). +24 VDC high side: Isolated at 250 VAC and factory tested to 3000 VDC (channel to system). No channel-to-channel isolation.
Dimensions	Height: 102.7 m (4.04 in.) Width: 133.3 mm (5.25 in.) Depth: 60.7 mm (2.39 in.)
Power input terminal wiring	0.05-2.08 mm²; 30-14 AWG
I/O terminal wiring	0.05-2.05 mm²; 30-12 AWG

⁽¹⁾ De-rate to 3 A per channel when operating above 60 °C ambient temperature.

⁽²⁾ De-rate to 3 A per channel when operating above 60 °C ambient temperature.

Figure: DO Mass Connection Board dimensions

Figure: DO Mass Connection Board parts locator diagram

Figure: Wiring for external power mode

Figure: Wiring for 24 VDC high side output mode