DI Mass Connection Board

Installation notes

The DI Mass Connection Board provides an interface to the simplex DI 32-channel 24 VDC dry contact card used with the 40-Pin Mass Terminal Block.
Two DI Mass Connection Boards (the DI Mass Connection Solution) are required to provide the interface to all 32 channels on the DI 32-channel 24 VDC dry contact card.
Two 20-pin ribbon cables (one per board) connect between the DI Mass Connection Solution and the 40-pin Mass Terminal Blocks.
Four screw terminals provide the connections for +24 VDC power and ground.
The DI Mass Connection Board provides a relay output to detect termination faults that indicate loss of input power to the board.
For dry contact mode, connect your device between + and n, where n = 1-16. Refer to the dry contact wiring diagram.
For external power mode, connect the positive voltage output of your device to one numbered screw terminal n, where n = 1-16, connect the return of the device to the ground bar, and connect the ground bar to the GND terminals. Refer to the external power mode wiring diagram below.
Power-input and channel fuses can be replaced in the field.

Table: DI Mass Connection Board specifications
Item	Specification
Field circuit power per board	+24 VDC ± 10% @ 75 mA typical, 100 mA maximum
Channel type	Discrete input, +24 VDC dry contact; detection on the - signal
Number of channels	16
Isolation	The field wiring connections are galvanically isolated from the DI card circuits and factory tested to 1000 VDC. No channel-to-channel isolation.
Detection level for ON	> 2 mA @ 24 VDC
Source impedance	5 KΩ
Source voltage	+24 VDC input power, current limited with replaceable fuse
Power input fuse	1 A, replaceable
Channel fuses	160 mA, replaceable
Dimensions	Height: 102.7 mm (4.04 in.) Width: 102.8 mm (4.05 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

Figure: DI Mass Connection Board dimensions

Figure: DI Mass Connection Board parts locator diagram

Figure: Wiring for dry contact mode

Figure: Wiring for external power mode