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Installation instructions, Isolated-circuit discrete input and output modules – Spectrum Controls 1746sc-OAP8I User Manual

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Installation Instructions

Isolated-Circuit
Discrete Input and Output Modules

7

1746sc-IB8I Specifications

Number of Inputs

8, sink or source

Points per Common

1 (individually isolated)

Voltage Category

24 Vdc

Operating Voltage

±

11.5 to 32 Vdc

Nominal Input Current

12 mA @ 24 Vdc

Input Signal Delay (maximum)

Off to On

0.5 ms @ 24 Vac

On to Off

1 ms @ 24 Vac

Off-State Current (maximum)

1.8 mA @ 4.5 Vac

Power Dissipation (maximum)

6.6 W @ 240 Vac/dc

Watts per point

0.4 W @ 24 Vdc; 0.6 W @ 32 Vdc

Total Watts

3 W @ 24 Vdc; 4.8 W @ 32 Vdc

Backplane Current Draw (max.) 5 V

0.110 A

24 V

0.0 A

Maximum allowable leakage current from an input device in an off state.

Maximum with 1input turned on.

Maximum with all 8 inputs turned on (100% duty cycle).

1746sc-IB8I On-Off-State Voltage Range

0 Vdc

4.5 Vdc

11.5 Vdc

32 Vdc

Off-State

Input State Not Guaranteed

On-State

1746sc-IB8I Circuit Diagram (one circuit shown)

IN –

VDC +

1.91

1.91 k

3.16 k

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