Technical Manual for EA350 Analog Pulse Type Servo Driver V101 3.4.4 Digital input terminal wiring The digital input (DI) terminal of EA350 series servo driver has a full-bridge rectifier circuit. Through the terminal current can be forward (NPN mode) or reverse (PNP mode). Take DI1 for example. DI1~DI8 have the same interface circuits. 1) When the higher-level device has relay output: Fig. 3-9 Wiring of the digital input terminal when the higher-level device has relay output Caution ☞ In this Manual, the following content is provided in default: ➢ The COM terminal has 7 pins; the user may also use 22/36 pins.
➢ The internal +24V power source of the servo uses 25 pins; the user may also use 40 pins 2) When the higher-level device has NPN open-collector output: Fig. 3-10 (a) Wiring of the digital input terminal when the higher-level device has NPN open-collector output 3) When the higher-level device has PNP open-collector output: Fig. 3-10 (b) Wiring of the digital input terminal when the higher-level device has PNP open-collector output Caution ☞ 1. When an external power source is used, do make sure the circuit between 24V and COM+ terminals is open 2. Mixed use of PNP and NPN is not supported 34