Emerson PACSystems RSTi User Manual page 55

User Manual
GFK-2745C
4.2.2 Specification
The following table describes the Input Specifications and the General Specifications for ST-
1124.
Table 30: ST-1124 Input and General Specifications
Items
Input Specification
Inputs Per Module
Indicators
ON-state Voltage
Minimum OFF-state Voltage
ON-state Current
Input Signal Delay
Nominal Input Impedance
Filtering Time
Common Type
General Specification
Power Dissipation
Isolation
Field Power
Wiring
Weight
Module Size
Environment Condition
Discrete Inputs
Specification
4 Points, Negative Logic
4 Green Input States, 1 Green/Red RSTi Bus State
5Vdc nominal
Minimum 2.4Vdc ~ Maximum 5.5Vdc
Maximum 0.8Vdc
Maximum 4.5mA/Point @5.5Vdc
OFF to ON: Maximum 0.5ms
ON to OFF: Maximum 0.5ms
Typical 1.3KΩ
Typical 1.5ms (software filtering)
4 Points/2COM (Single Common)
Maximum 35mA @ 5.0Vdc
I/O to Logic: Photo coupler isolation
Supply Voltage: 5Vdc nominal
Voltage Range: 4.5~5.5Vdc
I/O Cable Maximum 2.0mm² (AWG 14)
70g
12mm x 99mm x 70mm
See "Environmental Specifications" in Appendix A.
Chapter 4
Nov 2019
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