XBF-DC04A

Description

4-channel analog current output module (0–20 mA / 4–20 mA) for the LS Electric XGB/XBF expansion family, 12-bit D/A resolution. Requires an external 24 VDC expansion supply and uses removable screw terminals for field wiring.

The Polar Energy Assessment:

The XBF-DC04A provides four isolated current outputs with switchable ranges (0–20 mA and 4–20 mA), 12-bit resolution (digital range 0–4000 or ±2000 per vendor notation), typical update speed ~1 ms per channel, and load drive up to the vendor-specified resistance (commonly ≤510 Ω). It is a right-side expansion module for XGB series CPUs and requires external 24 VDC power for proper operation; the module uses photocoupler insulation between the PLC power and outputs (no channel-to-channel isolation).

Pros

• Four 4–20 mA / 0–20 mA outputs with 12-bit resolution for standard process control loops.
• Fast channel update (≈1 ms/channel) suitable for moderate-speed control tasks.
• Compact XGB form factor, right-side mounting, fits existing XGB racks without extra footprint.

Limitations

• Requires external 24 VDC expansion supply; factor this into the power budget.
• No galvanic isolation between channels (photocoupler isolation is between outputs and PLC power only), so treat channel-to-channel wiring carefully.
• 12-bit resolution is adequate for many tasks but lower than some higher-resolution modules (e.g., 14-bit variants), verify controller accuracy needs.

Typical use cases

• Retrofit projects replacing separate analog I/O blocks with compact XGB-compatible modules.
• Driving valve positioners, proportional valves, and analogue actuators in process or machine-control loops.
• Local D/A outputs for PID loops on OEM equipment where 4 channels per module is sufficient.