Rockwell-automation 1738-SSIM23 ArmorPoint I/O SSI Absolute Encoder Mo Uživatelský manuál stáhnout pdf (Strana 11)

Publication 1738-IN013A-EN-E - June 2004

ArmorPoint I/O Synchronous Serial Interface (SSI) Absolute Encoder Module, Series A 11

Specifications

Following are specifications for the 1738 ArmorPoint SSI Absolute

Encoder module.

ArmorPoint 1738-SSIM23 Module

Number of SSI Channels 1

Encoder Type Any absolute encoder supporting standard SSI protocol including linear, rotary, and

optical distance measuring devices.

Most-Significant Bit Aligned data format. Physical interface for clock and data signals is

RS-422.

SSI Data Rate 125kHz, 250kHz, 500kHz, 1MHz, 2MHz (software selectable)

SSI Bits Per Word 2-31 (software selectable)

SSI Word Delay Time

16µs-64ms (software selectable)

SSI Word Length 4 bytes (32 bits)

SSI Features Gray or binary code capable with gray to binary conversion, increasing or decreasing SSI

count indication, 2 SSI word comparator values, SSI word latching with I1 input.

SSI Position Forming Time

> 0.5ms

SSI Cable Type UL CM/AWM 2464/CSA Type CMG FT4 or similar cable utilizing shielded twisted pairs

for D+/- and C+/- connections. See sensor manufacturer for actual cable required for the

SSI sensor under use. I1 input can be wired separate from SSI cable

SSI Cable Length Depends on desired SSI data rate:

125kHz - 1050ft (320m)

250kHz - 525ft (160m)

500kHz - 195ft (60m)

1MHz - 65ft (20m)

2MHz - 25ft (8m)

SSI Sensor Power

(At V +/- Terminals)

10-28.8V dc common with field power voltage, 0.75A dc maximum with short circuit

protection

SSI Clock Drive Current

(Out of Clock +/- Terminals)

125mA maximum

Input I1 IEC Type 3 voltage and current characteristics, sourcing type

Minimum Nominal Maximum

ON-State Voltage 0V dc -- FPV* -10

ON-State Current 2mA 4mA 5mA

(FPV=24V dc)

OFF-State Voltage FPV-5 -- FPV

OFF-State Current 1.2mA -- --

Input Impedance -- 3.6kΩ 4.7kΩ

Input Filter Time -- 0.5ms --

* = FPV Field Power Supply Voltage

Field Power Supply Voltage (Bus Supply) Minimum Nominal Maximum

10V dc 24V dc 28.8V dc

Keyswitch Position 2

1 2 ... 6 7 8 9 10 11 12 13 14

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