Installation instructions, Isolated-circuit discrete input and output modules – Spectrum Controls 1746sc-OAP8I User Manual
Page 10

Installation Instructions
Isolated-Circuit
Discrete Input and Output Modules
8
1746sc-IC8I Specifications
Number of Inputs
8, sink or source
Points per Common
1 (individually isolated)
Voltage Category
48 Vdc
Operating Voltage
±
30 to 60 Vdc
Nominal Input Current
10 mA @ 48 Vdc
Input Signal Delay (maximum)
Off to On
0.5 ms @ 48 Vdc
On to Off
1 ms @ 48 Vdc
Off-State Current (maximum)
1.8 mA @ 9.5 Vac
➀
Power Dissipation (maximum)
4 W @ 120 Vac/dc
Watts per point
➁
0.6 W @ 48 Vdc; 0.85 W @ 60 Vdc
Total watts
➂
4.5 W @ 48 Vdc; 6.7 W @ 60 Vdc
Backplane Current Draw (max.) 5 V
0.110 A
24 V
0.0 A
➀
Maximum allowable leakage current from an input device in an off state.
➁
Maximum with 1 input turned on.
➂
Maximum with all 8 inputs turned on (100% duty cycle).
1746sc-IC8I On/Off-State Voltage Range
0 Vdc
9.5 Vdc
30 Vdc
60 Vdc
Off-State
Input State Not Guaranteed
On-State
1746sc-IC8I Circuit Diagram (one circuit shown)
IN –
VDC +
7.87
Ω
7.87 k
Ω
6.65 k
Ω