Tel: +44(0)1621 859500 Fax: +44(0)1621 855335 TR4800 Tachometer Relays Models Available TR4801-01 5-100rpm Tacho Relay TR4801-02 50-1000rpm Tacho Relay TR4801-03 500-10,000rpm Tacho Relay Product Features ■ NPN sensor or voltage free input ■ Internal 15Vdc supply for sensor ■ Standard DIN48 square size ■ Plug-in socket or panel mounting ■ Lockable dial to prevent tampering ■ Matching timers available ■ Matching temp. controllers available ■ Plug-in sockets also available The Tempatron TR4800 tachometer relays are designed to monitor and control speed by energising the relay output when the monitored speed exceeds the setting on the user adjustable front dial. Three models are available to cover speeds from 5rpm to 10,000rpm. All models have an internal 15Vdc power supply for powering active sensors and a 0-1mA meter output for displaying the speed. The tachometer relays are housed in a compact DIN48 square enclosure which can either panel mount or surface/DIN rail mount to a socket and they are auxiliary powered from either 24Vac/dc or 110/230Vac. The 5 Amp rated single pole changeover relay output contact is isolated from the supply voltage and the relays have two LEDs to indicate both power For monitoring and control of speed of rotating machinery and equipment Dimensions Panel cutout 45mm square (-0.0/+0.5) A switch input (relay contact, reed switch or open collector transistor etc.) may be used across terminals 5 and 7 as an alternative input to the unit instead of the NPN proximity sensor. When using a switch input, a resistor (approximate value 4.7k ohm) must be connected between terminals 5 and 6.

Tempatron Email: [email protected] Web: www.tempatron.co.uk Continued... Speed Range Code Description 01 5rpm to 100rpm Auxiliary Power Code Description 24VAC/DC 24Vac/dc Specification Repeat Accuracy: - ±2% of full scale Plug-in Bases Code Description CDSR11 11 Pin Rear Screw Panel Socket AZ611 11 Pin DIN Rail/Panel Mount Socket S11P 11 Pin DIN Rail/Panel Mount Socket - Voltage free contact (no bounce) - 3 wire active sensor with power consumption <25mA at 15Vdc - Single pole changeover contact Enclosure Code: - Case IP40 - CE marked (meets EN61010-1 low voltage and EN50081-1/50082-1 EMC...