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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

6

1746sc-IA8I Specifications

Number of Inputs

8

Points per Common

1 (individually isolated)

Voltage Category

100/120 Vac @ 50/60 Hz

100/120 Vdc, sink or source

Operating Voltage

80 to 150 Vac @ 47 to 63 Hz

85 to 170 Vdc

Nominal Input Current

16 mA @ 120 Vac, 60 Hz

2.5 mA @ 120 Vdc

Input Inrush Current (maximum)

0.7 A @ 120 Vac

Input Signal Delay (maximum)

Off to On

17 ms @ 120 Vac

7 ms @ 120 Vdc

On to Off

45 ms @ 120 Vac

40 ms @ 120 Vdc

Off-State Current (maximum)

4 mA @ 20 Vac

0.5 mA @ 20 Vdc

Power Dissipation (maximum)

Watts per point

0.5 W @ 120 Vac/dc; 0.75 W @ 150 Vac/dc

Total watts

4 W @ 120 Vac/dc; 6 W @ 150 Vac/dc

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 1 input turned on.

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

1746sc-IA8I On/Off-State Voltage Range

0 Vac*

0 Vdc

30 Vac*

20 Vdc

80 Vac*

85 Vdc

150 Vac*

170 Vdc

Off-State

Input State Not Guaranteed

On-State

* Frequency = 47 to 63 Hz

1746sc-IA8I Circuit Diagram (one circuit shown)

IN –

VAC/VDC +

249

24.3 k

24.3 k

0.33

µ

F

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