Remote I/O, or distributed I/O, offers several advantages over the traditional local I/O found on a Programmable Logic Controller (PLC). First, it allows you to locate the I/O modules close to the process that is being monitored or controlled. This greatly improves noise immunity, as the weak sensor signals are converted to digital signals before being transmitted long distances through a noisy plant environment. OMEGA universal remote I/O modules use a simple 2-wire RS485 link using MODBUS RTU/ASCII protocol, which is supported by most programmable logic controllers. A second advantage is that remote I/O greatly reduces the wiring at the main control panel, saving time and money when repairs and upgrades are necessary. Adding additional sensors and control signals is as easy as connecting to the already installed RS485 link and modifying the PLC program to utilize the new I/O. In addition, remote I/O allows you to expand your process control system beyond the local I/O capabilities of your PLC. You can add thermocouple, RTD, pressure, and flow sensors to a PLC that doesn’t support these types of inputs. With remote I/O, your process application is no longer dependent on your controller choice.
SPECIFICATIONS Number of Channels: 4: HE359ADC107, HE359ADC120, HE359DAC007, HE359RTD100, HE359THM100, HE359DIQ512 8: HE359ADC207, HE359ADV220, HE359DAC107, HE359DAC201, HE359THM200 12: HE359DIM610 Input Ranges: ±10V: HE359ADC107, HE359ADC207 ±20 mA: HE359ADC120, HE359ADV220 12/24 Vdc: HE359DIM610, HE359DIQ512 RTD Pt-100, Ni-100, Pt-1000, Ni-1000; 0 to 2000 Ω, 0 to 500 Ω: HE359RTD100 J, K, R, S, B, E, T, N; ±50 mV, ±100 mV, ±500 mV, ±1V: HE359THM100, HE359THM200 Output Ranges: 0 to 20 mA or 0 to 10V: HE359DAC007, HE359DAC107 0 to 10V: HE359DAC201 OFF Voltage Level: 0 to 3 Vdc (HE359DIM610, HE359DIQ512) ON Voltage Level: 10 to 30 Vdc (HE359DIM610, HE359DIQ512) Resolution: 16-bit: HE359ADC107, HE359ADC207, HE359ADC120, HE359ADC220 1 µA or 1 mV: HE359DAC007, HE359DAC107 1 mV: HE359DAC201 0.1°C or 0.1 Ω: HE359RTD100 0.1°C or 0.001 mV: HE359THM100, HE359THM200 RTD Excitation Current (HE359RTD100): 350 µA, typical Accuracy: ±0.1% FS: HE359RTD100, HE359THM100, HE359THM200 Load Resistance: Voltage: >5 kΩ (HE359DAC007, HE359DAC107, HE359DAC201) Current: <500 Ω (HE359DAC007, HE359DAC107) Output Calibration: Voltage: ±10 mV (HE359DAC007, HE359DAC107, HE359DAC201) Current: ±20 µA (HE359DAC007, HE359DAC107) Input Impedance: 1 MΩ: HE359ADC107, HE359ADC207 <50 Ω: HE359ADC120, HE359ADC220 4.7 kΩ: HE359DIM610, HE359DIQ512 >10 MΩ: HE359THM100, HE359THM200 Relay Outputs Per Module (HE359DIQ512): 4 (2 SPDT, 2 SPST) Max Switching Power (HE359DIQ512): 2A @ 250 Vac, 2A @ 30 Vdc Min Load (HE359DIQ512): 5 Vdc, 10 mA Max Voltage (HE359DIQ512): 250 Vac, 110 Vdc Linearity: ±0.1% External Power Supply Voltage: 10 to 30 Vdc: HE359ADC107, HE359ADC207, HE359ADC120, HE359ADC220, HE359DIM610, HE359RTD100, HE359THM100, HE359THM200 18 to 30 Vdc: HE359DAC007, HE359DAC107, HE359DAC201 Required Power (Steady State): 30 mA @ 24 Vdc, Typical: HE359ADC107, HE359ADC207, HE359ADC120, HE359ADC220, HE359DAC201, HE359RTD100, HE359THM100, HE359THM200 30 mA @ 24 Vdc, Typical (100 mA max): HE359DAC007, HE359DAC107 35 mA @ 24 Vdc,Typical: HE359DIM610 45 mA @ 24 Vdc, Typical: HE359DIQ512 Required Power (Inrush): Negligible Isolation: 2000 Vac for 60 seconds (input/power and input/comms) PLC Update Rate: Determined by Communications with OCS: HE359DIM610, HE359RTD100, HE359THM100, HE359HTM200 20 mS min: HE359DIQ512 Thermal Drift (HE359DAC201): 100 ppm max Terminal Type: Screw type, removable Storage Temperature: -40 to 85°C (-40 to 185°F) Operating Temperature: -10 to 60°C (14 to 140°F) Relative Humidity (Non-Condensing): 5 to 95%: HE359ADC107, HE359ADC207, HE359DAC007, HE359DAC107, HE359DAC201, HE359DIM610, HE359DIQ512, HE359RTD100, HE359THM100, HE359THM20 5 to 90%: HE359ADC120, HE359ADC220 Dimensions: 17.5 W x 100 H x 120 mm D (0.69 x 3.94 x 4.72') Weight: 150 g (6 oz); 210 g (8.4 oz) HE359DIQ512 only Communications: MODBUS®/RTU (binary) RS485 half duplex Default Communications Parameters: 38400 baud, N, 8, 1, no h/s default modbus ID 1 Supported MODBUS Commands: 1, 2, 3, 4, 5, 6, 8, 15, 16