Manual

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Installation Instructions

Bulletin 842-SPA Serial to Parallel Adaptor

IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.

Specifications

Size 103 x 165mm (4 x 6.5in)

Voltage Supply 11-32V DC

Supply Current 250mA (without load)

Operating Temperature

0_C to 50_C (32_F to 122_F)

Output Driver (parallel) PushĆpull, 10-32V, 35mA (max)

Input (SSI) RS422

Maximum SSI Cable Length 350m @ 125kHz; 25m @ 500kHz

Mounting Instructions

1. Locate and mount the 842–CH cardholder (purchased

separately) close to the controller. See the Dimensions

section to determine the 842–CH card holder hole

locations.

2. Wire the connections according to the a) Electrical

Connections b) Jumpers Needed and c) Direction Control

sections using wire size 26–16 AWG.

IMPORTANT: Wiring must be in accordance with the

National Electric Code and applicable local

codes and ordinances.

3. Insert the 842–SPA into the cardholder. Set the Hex

Function switch on the 842–SPA to the appropriate setting

as shown in Table 1 below:

Switch

Setting

Clock

Frequency

SSI

Input

Parallel

Output

4 500kHz Binary Binary

4 500kHz Gray Gray

5 125kHz Binary Binary

5 125kHz Gray Gray

6 500kHz Gray Binary

7 125kHz Gray Binary

4. Apply power supply of 11–32V DC to the 842–SPA.

5. The 842–SPA begins sending clock pulses and receives

data pulses in the synchronous serial interface (SSI)

format. An example timing diagram is in the Timing

Diagrams section.

6. The parallel output data can be found on the following bits

according to Table 2 below:

842A Encoder

Type

Pulses

Per Rev.

Bits Used

LSB-MSB

No. of

Revs.

Bits Used

LSB-MSB

A 8192 1-13 2048 14-24

B 4096 1-12 4096 13-24

C 2048 1-11 8192 12-24

D 4096 1-12 512 13-21

E 4096 1-12 256 13-20

Electrical Connections

Type Function 842-CH Terminal

842-SPA and Output Driver

Ground

1A, 2C, 25AÊ

842-SPA Power

32C,13CÊ

Power & Ground

Parallel Output Driver

Power

31A

Encoder Power 32A

Encoder Ground

1C,25CÊ

Data + 26C

SSI

Data - 26A

SSI

Clock + 27C

Clock - 27A

Error Bit

2AË

Error Bit

2AË

Bit 1 3C

Bit 2 3A

Bit 3 4C

Bit 4 4A

Bit 5 5C

Bit 6 5A

Bit 7 6C

Bit 8 6A

Bit 9 7C

Bit 10 7A

Parallel Output

STbl2f

Bit 11 8C

See Table 2 for

Bit Distri

uti

Bit 12 8A

Bit

Distribution

Bit 13 9C

Bit 14 9A

Bit 15 14C

Bit 16 14A

Bit 17 15C

Bit 18 15A

Bit 19 16C

Bit 20 16A

Bit 21 17C

Bit 22 17A

Bit 23 18C

Bit 24 18A

Ê Terminals are connected internally on the 842-SPA.

Ë The Error Bit is normally logic 0. If there is a power interruption (i. e. - low voltage)

during data transmission, the Error Bit is set to logic 1.

Summary of content (2 pages)

PAGE 1
Installation Instructions Bulletin 842-SPA Serial to Parallel Adaptor IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE. Specifications Electrical Connections Size Type 103 x 165mm (4 x 6.5in) Voltage Supply 11-32V DC Supply Current 250mA (without load) Operating Temperature 0_C to 50_C (32_F to 122_F) Output Driver (parallel) PushĆpull, 10-32V, 35mA (max) Input (SSI) Maximum SSI Cable Length Power & Ground RS422 350m @ 125kHz; 25m @ 500kHz Mounting Instructions 1.
PAGE 2
Jumpers Needed Timing Diagrams Connect the following three jumpers: Below is an example of a timing diagram as viewed on an oscilloscope. In this example, the 842A–31NB, a binary code output with 4096 pulses per revolution and 4096 turns is connected to an 842–SPA serial to parallel interface adaptor. The 842–SPA generates an SSI clock burst of pulses. On the positive slope of the start pulse, the 842A–31NB begins to transmit its position data.