User guide

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 CurrentDraw (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 kΩ
6.65 kΩ