L-9517-9106-01-A RGH26 series - serial communications readhead system * Non-contact open optical system * Integral interpolation * Mitsubishi compatible serial communications * Maximum speed up to 6m/s * Resolutions from 5m to 0.5m * Integral reference and dual limit sensors * No interface required * Integral set-up LED * Uses RGS-S self adhesive scale Serial communication (dual limit) range RGH26P - 5m resolution RGH26Q - 1m resolution RGH26R - 0.5m resolution Compatible Mitsubishi products MELSERVO(R)-J2-Super series The RGH26 r eadheads are a new addition to Renishaw's proven RG2 range of linear encoder systems. The RG2 range consists of non-contact optical encoders designed for precision position feedback solutions. The system uses a reflective tape scale scanned by a readhead chosen from a range of options. It offers industry standard digital square wave, analogue sinusoidal, and now Mitsubishi-compatible serial communication signal formats. Renishaw's patented filtering optical scheme is used in all RG2 linear encoders and gives outstanding performance combined with a high tolerance to dust, scratches and light oil contamination. The RGH26 range has been specifically d e s i g n e d f o r us e w i t h M i ts u b is h i ' s MELSERVO(R)-J2-Super series range of servo amplifiers. The RGH26 range offers exceptional high speeds of up to 6m/s with high resolutions of up to 0.5m. Unlike other serial communication systems for linear encoders, the RGH26 does not require a separate bulky interface. Renishaw's innovative electronics design means that all of the interpolation and serial conversion is contained within the same compact body as the popular RGH22. The incremental count takes place within the readhead, resulting in remarkable system noise immunity. Dual limit sensors have been incorporated as standard, offering two dedicated signal outputs, for left and right end-of-axis travel indication. A repeatable reference mark output is also included, along dedicated real-time channels, as well as part of the serial word. The class-leading compact size, exceptional high speed, high accuracy, and zero-friction configuration make the RGH26 range the encoder of choice for linear feedback applications wherever a MELSERVO(R)-J2-Super is used. =>?@D DATA SHEET 10.6 2.2 O4.7 Scale mounting surface Arrow indicates forward direction of readhead relative to scale P limit switch sensor position P limit switch actuator mount white dot to substrate (size as Q actuator) 14.5 7 14 Reference mark actuator Dimensions in mm General outline and dimensions 3 14.6 4 22 6 Min 5 3 23.5 10 15.5 10.5 6 2 holes M3x0.5 7.5 deep Pitch tol. 1.0 0.8 Set-up LED Mounting face Q limit switch actuator mount white dot up 0.38 Yaw tol. 0.5 2 Q limit switch sensor position 2 holes M3x0.5 9.5 deep Optical centre Reference mark sensor position Detail showing scale face to readhead clearance 38 44 14.6 R50 dynamic bend radius R10 static bend radius 17 3 0.80.1 13 9 0.13 27 Roll tol. 1.0 Alternative mounting face Extent of mounting faces 7.6 11.6 16 Operating and electrical specifications Power supply 5V 5% 230mA Temperature Storage -20C to +70C Operating 0C to +55C Humidity 10 - 90% RH non-condensing Sealing IP50 Acceleration operating 300m/s2 Shock (non-operating) 1000m/s2, 11ms, 1/2 sine Vibration (operating) 100m/s2 55 to 2000Hz as per IEC 68-2-6 Mass Readhead 45g Cable 38g/m EMC compliance (system) BS EN 50081-2 BS EN 50082-2 BS EN 55011 Cable 12 core, double shield, outside dia. 4.7mm. Flex life >10 x 106 cycles at 50mm bend radius Connector N - 15 pin D type plug Maximum speed (green LED at set-up) RGH26P (5m) 6.0m/s peak, 5.0m/s constant, 4.0m/s rated RGH26Q (1m) 4.6m/s peak, 4.0m/s constant, 3.2m/s rated RGH26R (0.5m) 2.3m/s peak, 2.0m/s constant, 1.6m/s rated Recommended signal termination Channels LZ and LZR (Reference mark output) (cannot be connected directly to MELSERVO(R)-J2-Super) * Optional power saving capacitor, for recommended values see below: Cable length C <25m 4n7F >25m 10nF Customer electronics Readhead Cable Zo = 120R 120R C* Standard RS485 line transceiver circuitry Channels P and Q (Dual limit outputs) (cannot be connected directly to MELSERVO(R)-J2-Super) Open collector output 5V to 25V Select R so that the maximum current does not R P, Q exceed 20mA. Alternatively, a suitable relay or opto-isolator may be used. Actuation device: RGP22S, RGP22SM or RGP22SL CONT (2-4 wire communications select) For 2-wire communication, leave CONT floating For 4-wire communication, connect CONT to 0V Channels MD, MDR, MR, MRR These channels should be connected to the relevant input of the MELSERVO(R)-J2-Super Signal specifications Channels LZ and LZR Form Square wave differential line driver to EIA RS422 LZ LZR Signal period P Resolution S Model Synchronised pulse LZ and LZR occurs when A is high. Repeatability of position (uni-directional) maintained within 10C from installation temperature and for speed <250mm/s. Signals A and B are incremental signals that occur inside the readhead. A and B are not available as outputs. P(m) S(m) RGH26P 20 5 A RGH26Q 4 1 B RGH26R 2 0.5 Actuation device RGM22S. Channels P and Q Form Open collector output Operating voltage = 5V to 25V Maximum current = 20mA Repeatability <0.1mm typical P, Q Actuation device: RGP22S, RGP22SM or RGP22SL Length of actuating magnet 2-wire serial communication (CONT left floating) Form Square wave differential transmission/receiving to EIA RS485 Request from MELSERVO(R) Data from RGH26 The inverse of this signal is transmitted along MRR MR 4-wire serial communication (CONT connected to 0V) Form Square wave differential transmission/receiving to EIA RS485 Request from MELSERVO(R) MRR and MDR (the inverse of MR and MD) have been omitted for clarity MR Data from RGH26 MD IMPORTANT: A reference mark (RGM22S) must be fitted to the axis to enable the use of the RGH26. 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Tel +41 55 415 50 60 Fax +41 55 415 50 69 email switzerland@renishaw.com Taiwan - Renishaw Representative Office Tel +886 4 251 3665 Fax +886 4 251 3621 email taiwan@renishaw.com UK (Head Office) - Renishaw plc Tel +44 1453 524524 Fax +44 1453 524901 email uk@renishaw.com USA - Renishaw Inc Tel +1 847 286 9953 Fax +1 847 286 9974 email usa@renishaw.com For all other countries Tel +44 1453 524524 Fax +44 1453 524901 email international@renishaw.com Renishaw reserves the right to change specifications without notice Part no. L-9517-9106-01-A