DI 32-channel 24 VDC dry contact card specifications

Installation notes

The Discrete 32-channel terminal block is recommended to provide terminations for field wiring for the DI 32-channel 24 VDC dry contact card. An optional terminal block is the 40-pin mass terminal block.
The return connection for all 32 channels is the 24 VDC field power ground. You must supply an external wire to make this connection. However the connection is internally made if the 40-pin mass terminal block is used and no external wire is required.
This card requires an S-series controller.

Table: DI 32-channel 24 VDC dry contact card specifications
Item	Specification
Number of channels	32
Detection level for ON	> 2 mA
Detection level for OFF	< 0.25 mA
Impedance	5 kΩ
LocalBus current (12 VDC nominal), per card	50 mA typical 75 mA maximum
Field circuit power, per card	150 mA at 24 VDC (-15%/+20%)
Heat dissipation	4.2 W
Isolation	Each channel is optically isolated from the system and factory tested to 1500 VDC.
Mounting	Assigned slot of I/O carrier

Figure: DI 32-channel 24 VDC dry contact card wiring diagram