User guide

Installation Instructions
Isolated-Circuit
Discrete Input and Output Modules
9
1746sc-IM8I Specifications
Number of Inputs 8, sink or source
Points per Common 1 (individually isolated)
Voltage Category 200/240 Vac @ 50/60 Hz
200/240 Vdc
Operating Voltage 160 to 264 Vac @ 47 to 63 Hz
170 to 265 Vdc
Nominal Input Current 13.5 mA @ 240 Vac, 60 Hz
2.5 mA @ 250 Vdc
Input Inrush Current (maximum) 0.7 A @ 240 Vac
Input Signal Delay (maximum)
Off to On 15 ms @ 240 Vac
7 ms @ 250 Vdc
On to Off 40 ms @ 240 Vac
36 ms @ 250 Vdc
Off-State Current (maximum) 2.5 mA @ 40 Vac
➀
0.85 mA @ 40 Vdc
Power Dissipation (maximum)
Watts per point
➁
085 W @ 240 c/dc; 1 W @ 264 Vac/dc
Total watts
➂
6.6 W @ 240 Vac/dc; 8 @ 264 Vac/dc
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-IM8I On-Off-State Voltage Range
0 Vac*
0 Vdc
60 Vac*
40 Vdc
160 Vac*
170 Vdc
264 Vac*
265 Vdc**
Off-State Input State Not Guaranteed On-State
* Frequency = 47 to 63 Hz ** 276 Vdc short-term overload (1 hour)
1746sc-IM8I Circuit Diagram (one circuit shown)
IN –
VAC/VDC +
499 Ω
49.9 kΩ
49.9 kΩ
0.15 µF