GE ST-1124 Discrete I/O Modules (Input)
RSTi Industrial I/O
RSTi discrete input modules are available for a wide range of applications requiring DC voltages
(5 VDC, 24 VDC, 48 VDC) and AC voltages (110 VAC, 220 VAC). The input modules are available in
4, 8 or 16 point density to optimize panel space.
Discrete I/O Modules (Input)
ST-1124 ST-1114 ST-1214 ST-1224 ST-1314
Product Name 5 VDC Input,
4 points Negative Logic
5 VDC Input,
4 points Positive Logic
12/24 VDC Input,
4 points Positive Logic
12/24 VDC Input,
4 points Negative Logic
48 VDC Input,
4 points Positive Logic
Lifecycle Status Active Active Active Active Active
Module Type Discrete Input Discrete Input Discrete Input Discrete Input Discrete Input
Input Voltage Range 5 VDC
(4.5 VDC to 5.5 VDC)
5 VDC
(4.5 VDC to 5.5 VDC)
24 VDC
(11 VDC to 28.8 VDC)
24 VDC
(10.2 VDC to 28.8 VDC)
48 VDC
(34 VDC to 60 VDC)
Number of Points 4 4 4 4 4
Points per Common 4 4 4 4 4
Input Impedance ~1.3K ohms ~1.3K ohms ~5.1K ohms ~5.1K ohms ~12K ohms
Input Signal Delay < 0.5msec < 0.5msec 3.0msec 3.0msec 3.0msec
Filtering Time Typical 1.5 msec.
(software filtering)
Typical 1.5 msec.
(software filtering)
Typical 1.5 msec. Typical 1.5 msec.
Trigger Voltage
On State: 2.4 VDC to
5.5 VDC
OFF State: 0.8 VDC
On State: 2.4 VDC to
5.5 VDC
OFF State: 0.8 VDC
ON State: 10.2 to
28.8 VDC
OFF State: 5 VDC
ON State: 10.2 to
28.8 VDC
OFF State: 5 VDC
ON State: 48 VDC
(34 VDC to 60 VDC)
OFF State: 10 VDC
Maximum On State Current 4.5 mA per point
at 5.5 VDC
4.5 mA per point
at 5.5 VDC
6 mA per point
at 28.8 VDC
6 mA per point
at 28.8 VDC
4 mA per point
at 48 VDC
Connector Type Spring Clamp
Terminal Block
Spring Clamp
Terminal Block
Spring Clamp
Terminal Block
Spring Clamp
Terminal Block
Spring Clamp
Terminal Block
Internal Power Used
(5 VDC loading)
35 mA @ 5.0 VDC
Maximum
35 mA @ 5.0 VDC
Maximum
35 mA @ 5.0 VDC
Maximum
35 mA @ 5.0 VDC
Maximum
35 mA @ 5.0 VDC
Maximum
Dimensions (H x W x D) in mm 99 x 12 x 70 99 x 12 x 70 99 x 12 x 70 99 x 12 x 70 99 x 12 x 70

Industrial I/O
RSTi discrete input modules are available for a wide range of applications requiring DC voltages
(5 VDC, 24 VDC, 48 VDC) and AC voltages (110 VAC, 220 VAC). The input modules are available in
4, 8 or 16 point density to optimize panel space.
Discrete I/O Modules (Input)
ST-1324 ST-131F ST-1218 ST-1228 ST-121F
Product Name 48 VDC Input, 4 points
Negative Logic
48 VDC Input, 16 points
Positive Logic
12/24 VDC Input, 8
points Positive Logic
12/24 VDC Input, 8 points
Negative Logic
12/24 VDC Input,
16 points Positive Logic
Lifecycle Status Active Active Active Active Active
Module Type Discrete Input Discrete Input Discrete Input Discrete Input Discrete Input
Input Voltage Range 48 VDC
(34 VDC to 60 VDC)
48 VDC
(34 VDC to 60 VDC)
24 VDC
(10.2 VDC to 28.8 VDC)
24 VDC
(10.2 VDC to 28.8 VDC)
24 VDC
(10.2 VDC to 28.8 VDC)
Number of Points 4 16 8 8 16
Points per Common 4 16 8 8 16
Input Impedance ~12K ohms ~12K ohms ~5.1K ohms ~5.1K ohms ~5.1K ohms
Input Signal Delay 3.0msec 3.0msec 3.0msec 3.0msec 3.0msec
Filtering Time Typical 1.5 msec. Typical 1.5 msec. Typical 1.5 msec. Typical 1.5 msec.
Trigger Voltage
ON State: 48 VDC
(34 VDC to 60 VDC)
OFF State: 10 VDC
ON State: 48 VDC
(34 VDC to 60 VDC)
OFF State: 10 VDC
ON State: 10.2 to
28.8 VDC
OFF State: 5 VDC
ON State: 10.2 to
28.8 VDC
OFF State: 5 VDC
ON State: 10.2 to
28.8 VDC
OFF State: 5 VDC
Maximum On State Current 4 mA per point
at 48 VDC
2.5 mA per point
at 60 VDC
6 mA per point
at 28.8 VDC
6 mA per point
at 28.8 VDC
6 mA per point
at 28.8 VDC
Connector Type Spring Clamp
Terminal Block
Connector Type Hirose,
HIF3BA-20D-2.54DSA
Spring Clamp
Terminal Block
Spring Clamp
Terminal Block
Connector Type Hirose,
HIF3BA-20D-2.54DSA
Internal Power Used
(5 VDC loading)
35 mA @ 5.0 VDC
Maximum
45 mA @ 5.0 VDC
Maximum
35 mA @ 5.0 VDC
Maximum
35 mA @ 5.0 VDC
Maximum
45 mA @ 5.0 VDC
Maximum
Dimensions (H x W x D) in mm 99 x 12 x 70 99 x 12 x 70 99 x 12 x 70 99 x 12 x 70 99 x 12 x 70