Yokogawa NFLR121-S50 Serial Communication Module

FAQ

Q1: What communication protocols does it support?
A1: It supports RS-422 and RS-485 serial communication protocols for point-to-point and multipoint communication.

Q2: What is the maximum communication distance?
A2: The maximum transmission distance is up to 1200 meters, depending on wiring and network layout.

Q3: How many NFLR121 modules can be installed per controller?
A3: Up to 8 modules can be installed per FCN controller.

Q4: What transmission speeds are supported?
A4: The module supports 12 selectable speeds from 300 bps to 115.2 kbps.

Q5: Does the module support full-duplex communication?
A5: Yes, it supports both full-duplex and half-duplex. However, only half-duplex is available on 2-wire setups.

Q6: Are terminating resistors included?
A6: Yes, two 120-ohm terminating resistors are provided with the module.

Q7: What type of terminal is used for wiring?
A7: The module uses M4 screw clamping terminal blocks (5 poles × 2).

Q8: Does the module have LED indicators?
A8: Yes, it features green LEDs for STATUS, ACT, RCV, and SND to indicate module operation and communication status.