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Module Overview
This DO module adds sixteen transistor output points to SPH controller racks. You can install FUJI FTU221B into any free slot of a FUJI SPH system. The unit provides high-density switching for solenoids, relays, and indicator lights. It expands system capacity without requiring additional power supplies.
Technical Specifications
| Parameter | Value |
|---|---|
| Dimensions (W x H x D) | 70 mm x 100 mm x 75 mm |
| Weight | 0.28 kg |
| Number of digital outputs | 16 points |
| Output type | Transistor (NPN sink type) |
| Output current rating | 0.5 A per point |
| Total output current | 4 A maximum per module |
| Output voltage range | 12 to 24V DC |
| Output response time | 1 ms typical |
| Short-circuit protection | Yes (self-resetting) |
| Overcurrent trip point | 0.7 A per channel |
| Interface to controller | SPH backplane connector |
| Field wiring interface | Two 10-point screw terminal blocks |
| Total onboard components | 168 discrete parts |
| Energy storage type | Ceramic and electrolytic capacitors |
| Energy storage rating | 180 µF at 35V DC |
| Operating temperature | 0°C to +55°C |
Board Layout and Components
The PCB arranges sixteen output channels into two banks of eight. Each output includes a dedicated power transistor and flyback diode. Moreover, 168 discrete components provide isolation and current limiting for every channel. Electrolytic capacitors filter the main power rail entering the board. Consequently, outputs maintain stable switching during simultaneous operations.
Installation Process
You can mount FUJI FTU221B into any standard SPH series rack slot. The backplane connector supplies power and receives output data from the CPU. Furthermore, two removable terminal blocks accept field wiring for all sixteen points. LED indicators on the front panel show each output’s on/off condition clearly.
Performance Advantages
This module switches up to 0.5 A per output with a 1 ms response time. The self-resetting short-circuit protection prevents damage from field wiring errors. Therefore, accidental shorts do not destroy output transistors. The 16-point density also saves valuable rack space for other functions.
Safety and Compliance
FUJI FTU221B meets CE and RoHS industrial standards. The board discharges stored energy below 3V within four seconds. Hence, technicians face minimal electrical risk during installation or removal.