531 - 1/4 DIN PLC, DCS, PC Control Backup Station
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Soluti terface PLC, DCS, PC CONTROL BACKUP STATION Auto/Manual Station Hot PID Backup Station The Interface Solution Experts www.miinet.com PS531 V5

PURPOSE AND OPERATION The 531 provides automatic PID control backup for critical loops controlled by PLC, DCS or PC systems. Unlike a single loop controller configured to sense and retransmit a control signal, which adds liability and complexity; the 531 has a simple operator interface, special parameters for control states upon host transfer or failure, and a special pass-through circuit that provides redundancy in the control loop. In HOST mode, the control signal (4-20mA) is hard wired to pass through the 531 without degradation. In LOCAL mode, the 531 generates the CV (control) signal...

SPECFICATIONS ACCURACY PROCESS VARIABLE INPUTS TYPICAL (Voltage) (Current) ± 0.025% full scale ± 0.100% full scale ± 0.050% full scale ± 0.150% full scale Universal input type. Any input type may be selected in the field. Selection of input type (thermocouple, RTD, voltage or current) via jumper. Selection of particular sensor or range is via front panel. ± 0.060% of span ± 0.150% of span ± 0.100% of span ± 0.250% of span ± 0.150% of span ± 0.375% of span ± 0.150% of span ± 0.500% of span ± 0.125% of span ± 0.150% of span ± 0.375% of span ± 0.250% of span ± 0.625% of span ± 0.375% of span ±...

INPUT IMPEDANCE Current Input: 250 ohms Voltage Input: 1 Mohm DIGITAL DISPLAYS Thermocouples: 10 Mohms RTDs: 10 Mohms UPDATE RATE Input is sampled and output updated 5 times per second. Display is updated 5 times per second. Passage of the HOST signal through the 531 is continuous. INPUT FILTER Single pole lowpass digital filter with selectable time constant from 0 to 120 seconds. CALIBRATION The station comes fully calibrated from the factory and continuously calibrates itself for component aging due to temperature and time, except for reference voltage. Field calibration can be performed...

MEMORY RETENTION Case: extruded, non-perforated black anodized aluminum with ABS plastic sleeve. Bezel: black plastic ABS. Chassis assembly: plug-in type. Keys: silicone rubber with diffusion printed graphics. NEMA rating: front panel conforms to NEMA 4X when instrument is properly installed. Lithium battery maintains all programming for approximately ten years. There are two levels of access: restricted and full. A configurable code is used to enter the full access level. Functions not available in the restricted level are configurable. AGENCY APPROVALS LISTED Process Control Equipment...

ORDERING INFORMATION * OUTPUT 1 — ALARM ORDER CODE OPTIONAL INPUTS ENTER “0” IF NOT DESIRED SERIAL COMMUNICATIONS ENTER “0” IF NOT DESIRED * Note: Base instrument contains universal PV input, remote setpoint input and 4-20mA CV (control) output with internal hard wired by-pass relays. The Interface Solution Experts • www.miinet.com United States • info@miinet.com Tel: (818) 894-7111 • FAX: (818) 891-2816 Australia • sales@mooreind.com.au Tel: (02) 8536-7200 • FAX: (02) 9525-7296 Belgium • info@mooreind.be Tel: 03/448.10.18 • FAX: 03/440.17.97 The Netherlands • sales@mooreind.nl Tel:...