Technical Specifications​

Sixteen analog input channels in two groups of eight. Voltage inputs 0–10 V and −10 to +10 V. Current inputs 0–20 mA and 4–20 mA. RTD inputs Pt100, Pt1000 and Ni1000 in two-wire or three-wire connection. Channels can be configured as digital inputs. Resolution twelve bits plus sign. Voltage input impedance greater than 100 kΩ. Current input impedance approximately 330 Ω. External supply 24 V DC, current draw 0.15 A, power consumption 6 W. Maximum field cable length 100 m. Common-mode input 24 V DC. Field side electrically isolated from internal electronics; no isolation between channels. Front LEDs for power, communication and per-channel status. Terminal units TU 715F or TU 716F. Dimensions 67.5 mm width, 76 mm depth, 54 mm height. Weight approximately 0.15 kg. IP20 enclosure. Operating temperature 0°C to +60°C. Storage temperature −40°C to +70°C.

Functional Features​

Per-channel signal-type configuration. Mixed voltage, current, RTD and digital input in one module. PROFIBUS DP remote I/O operation. Direct I/O for Freelance AC 700F and AC 900F. Spring or screw terminal support depending on terminal unit. UL Class I Division 2, cULus, CE and RoHS compliance.

Application Scenarios​

Chemical and petrochemical process signal acquisition. Power plant and water-treatment analog monitoring. Industrial furnace temperature measurement. Building automation sensing. Freelance DCS local and remote I/O cabinets.

Performance Parameters​

Sixteen channels, twelve-bit plus sign conversion, 6 W power, 100 m maximum analog cable, 24 V DC field isolation, 0–60°C operating range.

Material Composition​

Industrial-grade plastic module housing. S700 analog conditioning and A/D printed circuit board. Spring-type or screw-type field terminals according to terminal unit. Rear backplane connector.

Structural Characteristics​

Standard S700 slim module. Two eight-channel groups. Front wiring terminals, rear bus connector, DIN-rail terminal-unit mounting.

Working Principle​

Each channel conditions voltage, current or RTD resistance through precision input circuits. Current inputs use a shunt, RTD inputs use excitation current and reference resistance, voltage inputs use high-impedance buffering, and the A/D converter produces digital values transmitted to the Freelance controller or PROFIBUS master through the backplane.

Installation Requirements​

Mount the TU 715F or TU 716F terminal unit on a 35 mm DIN rail inside a control cabinet. Connect 24 V DC auxiliary supply to the terminal unit. Use shielded cable for analog signals and separate analog wiring from power wiring. Select two-wire or three-wire RTD connection exactly as configured in engineering software. Connect PROFIBUS DP only when the module is used as remote I/O.

Usage Precautions​

Channels are not isolated from one another. Do not apply signals outside the configured voltage, current or RTD range. Configure every channel before energizing the system. Do not hot-swap the module. Verify PT/Ni/RTD type, wiring polarity and calibration during commissioning.