Description

Yokogawa A2SAM105-H000 N-IO Analog Input Adapter

Configured for analog signal acquisition in Yokogawa CENTUM VP and ProSafe-RS platforms, the Yokogawa A2SAM105-H000 (A2SAM105 Analog Input Adapter) provides direct physical/electrical execution of 4–20 mA and voltage signal interfacing to the N-IO baseplate backplane.

Hardware Specifications

Parameter	Specification
Model	A2SAM105-H000
Brand	Yokogawa
Origin	Japan
Weight	0.10 kg
Dimensions	Compact plug-in, baseplate mounted
Operating Temp	0 to 60 degC
Power Consumption	Powered via baseplate 5 V DC rail
Input Types	4–20 mA DC, 1–5 V DC, 0–10 V DC
Allowable Input Range	0–40 mA, 0–30 V DC
Input Resistance	320 Ω @ 20 mA, 640 Ω @ 4 mA (powered); ≥100 kΩ (unpowered)
Accuracy	±4 mV / ±12 μA @ 23±2 degC; ±8 mV / ±24 μA @ 0–60 degC
Withstanding Voltage	500 V AC for 1 min (I/O adaptors), 42 V DC
Diagnostics	Open/short circuit detection, internal self-test
Redundancy	Simplex or TMR compatible
Safety Certification	Up to SIL3 (IEC 61508)
Protocol	HART 7 digital overlay

Channel-to-Channel Isolation

Each input channel maintains galvanic separation to prevent ground loop formation and minimize crosstalk. Isolation barriers sustain 500 V AC withstand ratings between adjacent channels and the backplane. This structure preserves measurement accuracy in electrically noisy environments and supports mixed current/voltage input configurations without interaction between channels.

Frequently Asked Questions

Q: Does the A2SAM105-H000 support live replacement?

A: No. The module must be de-energized before removal or insertion due to hard-wired field connections and baseplate power coupling.

Q: What is the transmitter excitation voltage range?

A: The adapter supplies 15.0 V DC minimum at 20 mA load, up to 24.0 V DC maximum at 0 mA load.

Q: Can HART 7 data be accessed simultaneously with analog values?

A: Yes. HART digital communication is superimposed on the analog loop without affecting 4–20 mA signal integrity.

Field Installation Guidelines

Mount the adapter directly onto the designated N-IO baseplate until fully seated. Secure field wiring with proper torque on screw terminals. Route analog input cables separately from power conductors to reduce inductive interference. Connect shield drains to the central grounding point at the cabinet only. Verify all input ranges via software configuration prior to commissioning.

Specifications

• Brand: Yokogawa

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems