US Digital will be closed for the holidays and unable to take orders Wednesday, December 24th through Friday, January 2nd. Learn more »

US Digital

Skip to main content
Products
- Cables / Connectors
  - Cables
    - 3-Pin
    - 4-Pin
    - 5-Pin
    - 6-Pin
    - 7-Pin
    - 8-Pin
    - 10-Pin
    - Adapter
    - CAN
    - USB
  - Connectors
- Digital Displays
- Encoders
  - Incremental
    - Linear
    - Modules
    - Rotary
      - Disks
      - Hollow Bore
      - Kit
      - Shaft
  - Absolute
    - Rotary
      - Kit
      - Shaft
- Hardware
- Inclinometers
  - Absolute
  - Incremental
- Interfaces
  - Encoder
    - Converters
    - Cable Drivers
  - ICs
  - PC
- Motor Drivers
- Power Supplies
News
- Events
- Press Releases
Company
Support

Home » Products » Interfaces » PC » Serial Bus

Overview

Parameter	Min.	Typ.	Max.	Units
Supply Voltage (into AD4B)	6.0	-	16	Volts
Supply Current (without encoder)	-	-	65	mA
RS232 Output High (RXD)	5.0	8.0	-	Volts
RS232 Output Low (RXD)	-	-8.0	-5.0	Volts
RS232 Input High (TXD)	3.5	-	15	Volts
RS232 Input Low (TXD)	-15	-	0.4	Volts
Current to Encoder	-	-	120	mA
Voltage to Encoder	4.8	5.0	5.25	Volts
Quadrature Input Frequency	0	-	1.2	MHz
Quadrature Encoder Inputs - Logic Low	-0.6	0.4	1.8	Volts
Quadrature Encoder Inputs - Logic High	2.0	3.0	5.7	Volts

Specifications apply over entire operating temperature range.
Typical values are specified at Vcc= 12V and 25C.

Parameter	Min.	Max.	Units
Storage Temperature	-40	100	C
Operating Temperature	0	70	C
Humidity (non-condensing)	0	95	%
120VAC Power Supply Input Power	-	6	Watts

Single-ended (S-interface):

Pin	Description
1	Ground
2	Index
3	A channel
4	+5VDC power
5	B channel

Differential (D-interface):

Pin	Description
1	Ground
2	Ground
3	Index-
4	Index+
5	A- channel
6	A+ channel
7	+5VDC power
8	+5VDC power
9	B- channel
10	B+ channel

Connectors

5-Pin	Description
CON-FC5-x*	Polarized finger-latching connector with 5-pins
10-Pin	Description
CON-FC10	Polarized finger-latching connector shell with two IDC 5-pin inserts

Cables

5-Pin	Description
CA-FC5-W4-NC-x	Polarized finger-latching connector on one end with four wires
CA-FC5-W5-NC-x	Polarized finger-latching connector on one end with five wires
CA-FC5-SH-NC-x	Polarized finger-latching connector on one end of a shielded cable
CA-FC5-SH-FC5-x	Polarized finger-latching connector on both ends of a shielded cable
10-Pin	Description
CA-FC10-SH-NC	Polarized finger-latching connector on one end of a shielded cable
CA-FC10-SH-FC10	Polarized finger-latching connector on both ends of a shielded cable

Attention:

Specify cable length when ordering.
* 22 AWG is standard. 24, 26 and 28 AWG are also available.

Product Description

The AD4B adapter provides a simple plug-in method for connecting a single-ended or differential quadrature encoder directly to an RS-232 serial com port. One end of the AD4B plugs into a standard serial port, while the other end plugs into a quadrature encoder. A quadrature counter (LFLS7166) inside the AD4B keeps track of encoder position, while a microprocessor provides a serial interface allowing the user to query the counter for encoder position. A Windows library is provided to give the user simple access to AD4B functions, and a sample program in Visual Basic provides a template for the user's custom application. The encoder interface IC used in this product can be purchased separately. See the LFLS7166 page for complete information.

The AD4B communicates with a host computer using an 8-bit binary format. Although not readable as ASCII text the binary format is fast and space efficient. The equipment connected to an AD4B must support 8-bit data transfer at a baud rate between 1200 and 115k baud.