Absolute encoders - bus interfaces End shaft max. ø14 mm Optical multiturn encoders 13 bit ST / 12 bit MT, RS485 GXM7S - RS485 Features –– Encoder multiturn / RS485 –– Optical sensing –– Resolution: singleturn 13 bit, multiturn 12 bit –– End shaft ø12 mm / ø14 mm –– Fieldbus protocol –– Max. 4 bus users –– Bus access according to master/slave principle Optional –– Integration of customer-specific RS485 protocols Technical data - mechanical design Voltage supply Housing ø58 mm Shaft ø12 mm end shaft ø14 mm end shaft Protection DIN EN 60529 IP 54 Operating speed ≤6000 rpm (mechanical) ≤6000 rpm (electric) Starting torque ≤0.015 Nm IP 54 Rotor moment of inertia 20 gcm² Materials Housing: steel Flange: steel Operating temperature -25...+85 °C -40...+85 °C (optional) 10...30 VDC Reverse polarity protection Yes Consumption w/o load ≤50 mA (24 VDC) Initializing time (typ.) 250 ms after power on Interface RS485 Transmission rate 38.4 kBaud User address Coded by connection Steps per turn 8192 / 13 bit Number of turns 4096 / 12 bit Absolute accuracy ±0.025° Sensing method Optical Code Binary Relative humidity 95 % non-condensing Code sequence CW/CCW coded by connection Resistance Output circuit RS485 Interference immunity DIN EN 61000-6-2 Emitted interference DIN EN 61000-6-4 DIN EN 60068-2-6 Vibration 10 g, 16-2000 Hz DIN EN 60068-2-27 Shock 100 g, 6 ms Approval UL approval / E63076 Weight approx. 600 g E-connection Connector or cable 1 www.baumerivo.com 13/11/2008 Technical data - electrical ratings Subject to modification in technic and design. Errors and omissions excepted. GXM7S with end shaft Absolute encoders - bus interfaces End shaft max. ø14 mm Optical multiturn encoders 13 bit ST / 12 bit MT, RS485 GXM7S - RS485 Part number GXM7S. Accessories 10 01 Connectors and cables Z 130.001 Female connector M23, 12-pin, less cable Interface 01 RS485 Z 130.003 Female connector M23, 12-pin, 2 m cable Z 130.005 Female connector M23, 12-pin, 5 m cable Z 130.007 Female connector M23, 12-pin, 10 m cable E-connection A1 Connector M23, 12-pin, radial 21 Cable 1 m, radial 0 1 B 4 5 F Mounting accessories End shaft End shaft ø12 mm without pin End shaft ø12 mm with pin 15 mm End shaft ø12 mm with pin 9.5 mm End shaft ø14 mm without pin End shaft ø14 mm with pin 15 mm End shaft ø14 mm with pin 9.5 mm Z 119.024 Torque support and spring washer for encoders with 9.5 mm pin Z 119.041 Torque support by rubber buffer element for encoders with 15 mm pin Z 119.050 Spring coupling Z 119.053 Spring coupling height 19.1 mm Z 119.070 Spring coupling height 29.1 mm Z 119.072 Spring coupling for encoders with ø58 mm housing, hole distance 73 mm Z 119.073 Spring coupling for encoders with ø58 mm housing, hole distance 68 mm Z 119.076 Spring coupling for encoders with ø58 mm housing Z 119.082 Spring coupling for encoders with ø58 mm housing, hole distance 63 mm Data transmission format Structur of data fields Demand from master SOH 80h ADR 80h EOT Reply of encoder SOH EAD MT_H MT_L ST_H ST_L LRC EOT Explanation SOH Value = 01h ADR Address of encoder, value 02h - 05h EOT Value = 04h EAD Bit 0 - 3 response of encoder address (bit 4 -7 not defined) MT_H High byte revolution MT_L Low byte revolution ST_H High byte steps ST_L Low byte steps LRC EAD XOR MT_H XOR M_T_L XOR ST_H XOR ST_L 2 www.baumerivo.com 13/11/2008 Subject to modification in technic and design. Errors and omissions excepted. Basic settings of RS485 serial interface • 1 start bit • 8 data bits (least significant bit first) • 1 stop bit • Parity none • Baud rate: 38.4 kBaud Absolute encoders - bus interfaces End shaft max. ø14 mm Optical multiturn encoders 13 bit ST / 12 bit MT, RS485 GXM7S - RS485 Terminal significance Terminal assignment UB Encoder voltage supply. Connector Core colour Assingment GND Encoder ground connection relating to UB. Pin 1 brown UB T,R IN T,R OUT Serial data lines. To avoid stub lines the data lines are guided outside on a pair of 2 wires. The arriving bus is on T,R+ IN and T,R- IN, the departing bus on T,R+ OUT und T,R-. If the encoder serves as bus termination or is the only user, only the pair of wires T,R+ IN and T,R- IN is utilized. Note: External connection of terminating resistor 150 Ω to final user. Pin 2 black GND Ident 1...2 T,R+ IN beige Ident 1 Pin 5 green T,R- OUT Pin 6 yellow Ident 2 Pin 7 violet T,R- IN Pin 8 brown/yellow UP/DOWN Pin 9 pink T,R+ OUT Pin 10 black/yellow Zero setting Pin 11 – – Pin 12 – – 8 7 UP/DOWN counting direction input. This input is standard on High. UP/DOWN means ascending output data with clockwise shaft rotation when looking at flange. UP/DOWN-Low means ascending values with counterclockwise shaft rotation. Ident 1...2 are utilized for setting the en coder addresses (identifiers). Less poten tial the inputs are internally against UB (=“1“) by pull-up resistors what equals address 2. 9 1 10 12 2 Please use cores twisted in pairs (for example T,R+ / T,R-) for extension cables of more than 10 m length. 3 6 5 11 4 Trigger level Interface Circuit Data Linedriver RS485 Control inputs Input circuit Address 2 3 4 5 Input level High >0.7 UB Ident 1 1 0 1 0 Input level Low <0.3 UB Ident 2 1 1 0 0 Input resistance 10 kΩ 3 Subject to modification in technic and design. Errors and omissions excepted. UP/DOWN Input for setting a zero point anywhere within the programmed encoder resolution. The zero setting operation is triggered by a High impulse and has to be in line with the selected direction of rotation (UP/DOWN). Connect to GND after setting operation for maximum interference immunity. Impulse duration >100 ms. blue Pin 4 www.baumerivo.com 13/11/2008 Zero setting Pin 3 Absolute encoders - bus interfaces End shaft max. ø14 mm Optical multiturn encoders 13 bit ST / 12 bit MT, RS485 GXM7S - RS485 Dimensions M x6 58 20 15 (9.5) 60.5 (6 x) ø14 H7 x 35 (ø12 H7 x 35) 7.5 60.5 7.5 17 47 42 59 ø4 fg6 3 15° 16 6 1 3.5 12 30 4 www.baumerivo.com 13/11/2008 Subject to modification in technic and design. Errors and omissions excepted. 59 GXM7S connector dimensions