Signal Converters & Isolators Introduction & Selection Guide INTRODUCTION Process control and monitoring systems often utilise a large number of standard process signals; Voltage levels, current loops, temperature and pulsed signals to name but a few. When designing a system from scratch it may be possible to exactly match each type of sensor to a controller, but it is not always cost effective to do so. PLCs and other controllers tend to be built in modular form, so to purchase a block of 8 analogue inputs just to cope with 1 analogue signal can be a very expensive exercise. When it comes to modifying existing systems, the problem becomes even worse. A substantial rebuild of the system is often necessary just to provide the facillity of 1 or 2 extra inputs.Fortunately, a simple, cost effective solution is at hand - the PX range of treshold and signal converters. With Brodersen PX Process Signal Conditioners, signals can be converted from one standard to another and even an analogue signal can be effectively fed into a digital input. The PX Signal Conditioner is a high quality product which has been designed and tested to the latest requirements for EMC immunity/emission and the low voltage directive (CE marked). The PX Signal Conditioner also provides a galvanic isolation of 3.75kV. The PX relay is of a new design, supplied in a standardised industrial housing, 22.5mm wide, for mounting on 35mm symmetrical DIN-rail with touch-proof, combi notch-screw terminals. A snap-on cover on the front of the relay conceals the adjustment potentiometres. E-mail: [email protected] '"OHJ.NI Ot-IXd | OZ-lXd | OZ-DXd | tt/Ot-lXd | OZ-lXd | Ot-dXd Ot-dXd | OZ-dXd | Ot-QXd

DESCRIPTION A threshold relay for the monitoring or control of common types of process signals. The process signal to be monitored is selected on the front panel and the threshold value is also adjusted via a setpoint potentiometer on the front of the relay. As the input signal attains the threshold plus the hysteresis the output relay energises. When the input signal drops and passes the threshold, minus hysteresis, the relay de-energises. The hysteresis is adjustable on the front, ±0,5 - 20%. By strapping 2 terminals, the relay can be inverted. A red LED indicates if the relay is energised....

Input: Input signal 0-5V DC 0-10V DC -10-+10V DC 0-20mA DC 4-20mA DC Selected via switches on the front panel. Hysteresis: ±0,5-20% of range, adjustable. Response time: Time constant (t = approx. 0,3s, worst case of response time max. 5xt ). Upper critical frequency 30 Hz. Output: SPDT relay: Max load AC: Max load DC: Max. in rush current: Min. in rush current: Frequency : Life span: Delay: Contact material, AgNi 0,15 with hardened gold plating Au. 8A/240V AC (cos 9=1) Max. breaking capacity2000VA. Inductive load. See fig. 1. 8A/24V DC. Max. breaking capacity 50-270W. See fig. 2. 15A (max. 4s/duty...

DESCRIPTION A threshold relay for the monitoring or control of common types of process signals. The process signal to be monitored is selected on the front panel and the threshold value is also adjusted via a setpoint potentiometer on the front of the relay. As the input signal attains the threshold plus the hysteresis the output relay energises. When the input signal drops and passes the threshold, minus hysteresis, the relay de-energises. The hysteresis is adjustable on the front, ±0,5 - 20%. By strapping 2 terminals, the relay can be inverted. A red LED indicates if the relay is energised....

Input: Input signal 0-5V DC 0-10V DC -10-+10V DC 0-20mA DC 4-20mA DC Selected via switch on the front panel. Hysteresis: ±0,5-20% of range, adjustable. Response time: Time constant (t = approx. 0,1s, worst case of response time max. 5xt ). Upper critical frequency 30 Hz. Output: Solid state (NO/NC) UMAX = ±35V DC/24VAC Lax = 100mA On resistor min. 15 ohm, max. 35 ohm. Off state leak = max. 1pA. See fig. 1. Supply voltage: Versions: 924 = 24V DC (20,4-27,6)V DC General data: Ambient temperature:-20 to 55°C. Storage temperature:-40 to 80°C. Mounting: 35mm DIN-rail (EN50022). Terminals: Screw terminals...

Signal Converters & Isolators Process Signal Converter PXU-20 DESCRIPTION Signal converter for the conversion of an analogue process signal to another type and /or to provide galvanic isolation. A typical application would be to convert a signal from a probe, not directly compatible with an analogue input of a PLC and/or provide galvanic isolation between input and output. Input, output and operating voltage are isolated to 3,75kV AC and are therefore suitable for applications suffering from potential differences/ground loops, high load resistor by long probe cables. Input is selected via switches...

Input signal Input signal 0-5V DC 0-10V DC -10-+10V DC 0-20mA DC 4-20mA DC Selected via switches on the front Upper critical frequency 30 Hz. Signal Converters & Isolators Process Signal Converter PXU-20 SPECIFICATIONS: Output: Output signal 4-20mA DC 0-20mA DC 0-10V DC R r*MAX 500 Ohm 500 Ohm via intern 500 Ohm shunt Offset(zero) and gain(span) are adjustable ±5%. See. fig. 1. Accuracy: Linearity: Temp. coefficient Ripple (RMS): <1%, without adjustment. <0,05% of full scale. 0,02%/°C. <0,1%. Supply voltage: Supply voltage 24V DC (20,4-27,6)V DC 24V AC (20,4-27,6)V AC 110-230V AC (95-265)V AC...

Signal Converters & Isolators Temperature Converter PXT-10/11 WIRING DIAGRAM Temperature converter for converting a temperature to an analogue process signal. The temperature converter has an Pt100/Pt1000 input in two ranges -50-300°C and -50-100°C. A typical application is where temperature measurement is required and when a PLC/ Controller only has analogue inputs. The temperature range for input and type of analogue output are selected via choice of terminal - see connection diagram. Features • Pt100/Pt1000 probe input with/without compensation for cable resistance in two ranges -50 to 300°C...