Appearance
Serial I/O Modules
YenGear Serial I/O Modules provide local signal acquisition and control for PLCs and equipment controllers. Y301 covers digital and analog I/O expansion. Y305 runs local PLC programs with digital I/O and optional analog channels. Y331 adds fully isolated multi-range analog inputs and analog input/output configurations with RS232, isolated RS485, and isolated CAN interface options; isolated RS485 is the default.
Y305 PLC I/O Modules
Y305 provides programmable local control with 4 DI + 4 DO or 8 DI + 8 DO. Y305-4421 and Y305-8821 add two 0–10 V inputs and one 0–10 V output. Relay outputs are standard; NPN transistor outputs are a separate hardware option. Specify RS485 port count and RTC separately.
| Model | DI | DO | AI | AO |
|---|---|---|---|---|
| Y305-4400 | 4 | 4 | 0 | 0 |
| Y305-4421 | 4 | 4 | 2 | 1 |
| Y305-8800 | 8 | 8 | 0 | 0 |
| Y305-8821 | 8 | 8 | 2 | 1 |
Match supply, load, and signal requirements to the ordered hardware before installation. The specification and manuals retain the electrical conditions and configuration limits for each task.
Model Naming
The positions after Y301- represent DI / DO / AI / AO channel counts on one module. 0 means no channels of that type. Models without AO use three characters for DI, DO, and AI; models with AO retain the fourth position.
| Code | Channel count |
|---|---|
0–9 | 0–9 |
A | 10 |
G | 16 |
W | 32 |
Interface options are specified separately from the I/O code; use the configuration table in the relevant specification.
| Example | Model interpretation |
|---|---|
Y301-222 | 2 DI, 2 DO, 2 AI, and no AO. |
Y301-G00 | 16 DI; no DO, AI, or AO. |
Y301-00G | 16 AI; no DI, DO, or AO. |
Y301-0004 | 4 AO; no DI, DO, or AI. |
MiniLink Series
MiniLink Series are compact serial I/O modules for small-scale switch acquisition, simple relay control, and device integration.
| Product Image | Model | DI | DO | AI | AO | Documents |
|---|---|---|---|---|---|---|
 | Y301-110 | 1 | 1 | 0 | 0 | User Manual Specification Technical Manual |
 | Y301-200 | 2 | 0 | 0 | 0 | User Manual Specification Technical Manual |
 | Y301-020 | 0 | 2 | 0 | 0 | User Manual Specification Technical Manual |
ControlLink Series
ControlLink Series are serial I/O modules with both digital inputs and relay outputs. All models include DI and DO channels for integrated acquisition and control.
| Product Image | Model | DI | DO | AI | AO | Documents |
|---|---|---|---|---|---|---|
 | Y301-220 | 2 | 2 | 0 | 0 | User Manual Specification Technical Manual |
 | Y301-222 | 2 | 2 | 2 | 0 | User Manual Specification Technical Manual |
 | Y301-440 | 4 | 4 | 0 | 0 | User Manual Specification Technical Manual |
 | Y301-444 | 4 | 4 | 4 | 0 | User Manual Specification Technical Manual |
 | Y301-880 | 8 | 8 | 0 | 0 | User Manual Specification Technical Manual |
FlexPoint Series
FlexPoint Series expand single-type I/O points for applications requiring additional DI, AI, or AO channels.
| Product Image | Model | DI | DO | AI | AO | Documents |
|---|---|---|---|---|---|---|
 | Y301-600 | 6 | 0 | 0 | 0 | User Manual Specification Technical Manual |
 | Y301-800 | 8 | 0 | 0 | 0 | User Manual Specification Technical Manual |
 | Y301-G00 | 16 | 0 | 0 | 0 | User Manual Specification Technical Manual |
 | Y301-006 | 0 | 0 | 6 | 0 | User Manual Specification |
 | Y301-008 | 0 | 0 | 8 | 0 | User Manual Specification |
 | Y301-00G | 0 | 0 | 16 | 0 | User Manual Specification |
 | Y301-0004 | 0 | 0 | 0 | 4 | User Manual Specification |
 | Y301-0006 | 0 | 0 | 0 | 6 | User Manual Specification |
 | Y301-0008 | 0 | 0 | 0 | 8 | User Manual Specification |
Note:
Y301-G00means 16DI, whileY301-00Gmeans 16AI. They are different models.
Quick Selection Guide
- For small-point applications, choose MiniLink Series:
Y301-110/200/020. - For combined acquisition and control, choose ControlLink Series:
Y301-220/222/440/444/880. - For single-function point expansion, choose FlexPoint Series:
Y301-600/800/G00/006/008/00G/0004/0006/0008.
For a detailed comparison of all Y301 Serial I/O Modules models, see the Y301 Serial I/O Modules Selection Guide.
Y331 Analog Module Series
Y331 belongs to the Serial I/O Modules family and has two product groups with separate specifications and technical manuals. The four-position code follows DI / DO / AI / AO; retain all four positions, including zeros. Specify the signal range and interface separately when ordering.
| Product group | Models | Signal options | Isolation scope |
|---|---|---|---|
| Fully Isolated Multi-Range Analog Input Modules | Y331-0020/0040/0060/0080 | Millivolt, voltage, milliamp, and ampere inputs | Input channels isolated from one another; isolated RS485/CAN |
| Analog Input/Output Modules | Y331-0011/0022/0044/0066/0088 | Voltage and milliamp inputs/outputs | Isolated RS485/CAN options; channel isolation to be confirmed |
Fully Isolated Multi-Range Analog Input Modules
| Model | DI | DO | AI | AO |
|---|---|---|---|---|
| Y331-0020 | 0 | 0 | 2 | 0 |
| Y331-0040 | 0 | 0 | 4 | 0 |
| Y331-0060 | 0 | 0 | 6 | 0 |
| Y331-0080 | 0 | 0 | 8 | 0 |
- Voltage inputs: 0-100 mV, 0-500 mV, 0-5 V, 0-10 V, 0-30 V
- Current inputs: 0-20 mA, 4-20 mA, 0-2 A, 0-10 A
- Specification
- RS485 Technical Manual
Analog Input/Output Modules
| Model | DI | DO | AI | AO |
|---|---|---|---|---|
| Y331-0011 | 0 | 0 | 1 | 1 |
| Y331-0022 | 0 | 0 | 2 | 2 |
| Y331-0044 | 0 | 0 | 4 | 4 |
| Y331-0066 | 0 | 0 | 6 | 6 |
| Y331-0088 | 0 | 0 | 8 | 8 |
For example, Y331-0044 provides 4 AI + 4 AO. Inputs and outputs offer 0-5 V, 0-10 V, 0-20 mA, or 4-20 mA ranges. Specify input and output ranges separately; mixed-range availability requires confirmation.
Both groups use isolated RS485 by default, with RS232 and isolated CAN options under the same Y331 model prefix.