AC-22B hanical installation Refer to To install a side option on page 69. Electrical installation WARNING! Obey the instructions in Safety instructions on page 13. If you ignore them, injury or death, or damage to the equipment can occur. Wiring – General Connect the pulse encoder to the BTAC module with cables as specified in this table. * If the encoder supply voltage is less than 10 V, the maximum cable length is 50 m. Cable Max. connector size Maximum cable length 4 × (2+1) double shielded twisted pair cable with individual and overall shields 2.5 mm2 12 AWG 100 m* 330 ft 136 BTAC-02 pulse encoder interface module Terminal designations The encoder user interface of the BTAC module consists of four 1×3-pin terminal blocks. Use this table for reference when you wire the BTAC module and encoder terminals. Identification Description BTAC Encoder X103 VIN Vcc/PWR External power supply input VOUT Vcc/PWR Power supply output for the encoder GND 0 V / GND External power and encoder ground X104 A 1 A A+ Encoder signal A + terminal A 1 A A- Encoder signal A - terminal GND - - - Encoder ground X105 B 2 B B+ Encoder signal B + terminal B 2 B B- Encoder signal B - terminal GND - - - Encoder ground X106 Z 3 Z Z+ Encoder signal Z + terminal Z 3 Z Z- Encoder signal Z - terminal GND - - - Encoder ground. Channels Description BTAC Encoder A 1 A A+ • Maximum signal frequency: 200 kHz A 1 A A- • Signal levels: B 2 B B+ Encoder supply voltage Logic “1” Logic “0” B 2 B B- 5 V >2.5 V 7.5 V 12.1 V <8.3 V • Decision levels are automatically defined based on the daisy chained power supply voltage level. • Input channels are isolated from the logic and ground. • When the drive runs in the Forward direction, channel A should lead channel B by 90° (electrical). • Channel Z: One pulse per revolution (used in positioning applications only). BTAC-02 pulse encoder interface module 137 Wiring – Encoder power supply interface Connect the encoder power supply via the BTAC module. The same power supply feeds power to the signal interface of the BTAC module. For the voltage and current rating, refer to Encoder interface on page 148. If you use a 24 V encoder, you can use the 24 V DC power supply of the drive for the encoder and BTAC module. Make sure that you do not exceed the load capacity. Refer to Auxiliary voltage connection on page 67. Use the following table to determine if you can use the drive’s supply. Add the missing figures and sum all: the sum value must not exceed the total load capacity of the drives' supply. 1. Encoder 2. BTAC module 3. Encoder power supply Loads with the drive’s 24 V DC supply mA Number of digital inputs used × 15 mA each BTAC-02 50 mA Encoder current requirement = Total requirements for any other user connection(s) to drive’s 24 V DC = Total (must be less than the maximum load capacity of the drive’s 24 V DC supply) = Vcc Vcc 0V 0V GND Vout Vin 1 2 3 138 BTAC-02 pulse encoder interface module Wiring – Encoder 1. Remove the connector cover. 2. Determine the encoder wiring configuration: • Refer to Phasing on page 139 to determine if the encoder has a normal pulse order – encoder channel A pulse leads channel B pulse. • Refer to Encoder output types on page 140 to determine the encoder output type. • For push-pull types, refer to the manufacturer’s recommendation for the connection. You can use single-ended or differential output. 3. Refer to Wiring diagrams – Push-pull type encoder output, Wiring diagrams – Open collector (sinking) encoder output or Wiring diagrams – Open emitter (sourcing) encoder output on pages 141…144 to select the appropriate diagram, and wire the encoder. Notes: • Normally, ground the cable shield only at the drive end. • Do not route the encoder cables in parallel to power (for example, motor) cables. 4. Verify correct encoder phasing. Refer to Phasing on page 139. BTAC-02 pulse encoder interface module 139 Phasing When the encoder is connected correctly, running the drive in the Forward (positive speed reference) direction should produce a positive encoder speed feedback. Option A: Oscilloscope test. On incremental encoders, the two output channels, typically A and B or 1 and 2, are 90° (in phase) apart from each other. When rotated clockwise, in most encoders channel A leads channel B. To determine the leading channel, refer to the encoder documentation or use an oscilloscope. Connect the encoder output channel that leads when the drive runs Forward to BTAC terminal A. Connect the output channel that trails to BTAC terminal B. Option B: Functional test. For this test: • Temporarily, switch the drive to the scalar mode [parameter 99.04 Motor ctrl mode = 1 (SCALAR)]. • Run the drive in the forward direction. • Verify that parameter 90.13 Enc1 revol extension increases in the positive direction. • If not, switch the A/A (or 1/1) connections. |
