7I47S MANUAL
8/12 channel motion oriented differential interface with analog out
V1.1
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Table of Contents
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
HARDWARE CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
TERMINATION ENABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
CONNECTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CONNECTOR LOCATIONS AND DEFAULT JUMPERS . . . . . . . . . . . . . . . . . 3
CONTROLLER CONNECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
RS-422 CONNECTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
AUX 5V POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
OPERATION
5V POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
RS-422 OUTPUT DRIVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INPUT OUTPUT POLARITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
MONITOR / ENCODER LEDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
ANALOG OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
ISOLATED OUTPUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7I47S 1
GENERAL
DESCRIPTION
The 7I47S is a 12 input, 8 output RS-422 interfface for Mesa’s Anything I/O series
of FPGA interface cards. The 7I47 has 12 receive and 8 transmit channels plus a analog
output intended for spindle speed control. The 7I47S is mainly intended for motion oriented
applications, for example as an output buffer and line receiver for connecting step and
direction drives and encoders to Anything I/O FPGA cards.
The controller connection is a 50 pin header that matches the pinout of Mesa’s
Anything I/O cards. All RS-422 interface connections use pluggable Phoenix compatible
3.5 mm screw terminals.
7I47S 2
HARDWARE CONFIGURATION
GENERAL
Hardware setup jumper positions assume that the 7I47S card is oriented in an
upright position, that is, with the 50 pin controller connector is on the left hand side.
DEFAULT CONFIGURATION
JUMPER FUNCTION DEFAULT SETTING
W1 CABLE/AUX 5V POWER LEFT = CABLE POWER
W4 RX11 LEFT = TERM
W5 RX5 LEFT = TERM
W6 RX10 LEFT = TERM
W7 RX4 LEFT = TERM
W8 RX9 LEFT = TERM
W9 RX3 LEFT = TERM
W10 RX8 LEFT = TERM
W11 RX2 LEFT = TERM
W12 RX7 LEFT = TERM
W13 RX1 LEFT = TERM
W14 RX6 LEFT = TERM
W15 RX0 LEFT = TERM
TERMINATION ENABLE
The 7I47S can terminate its RS-422 inputs if desired. Termination is enabled by
setting the appropriate jumper to the left hand position. If termination is not desired, the
jumper should b moved to the right hand position.
CABLE POWER ENABLE
The 7I47S can supply I/O power to P3 and P4 via P1 or via the 50 conductor flat
cable. If W1 is in the left hand position, flat cable power is used. If W1 is on the right hand
position, P1 power is used.
7I47S 3
CONNECTORS
CONNECTOR LOCATIONS AND DEFAULT JUMPER POSITIONS
7I47S 4
CONNECTORS
CONTROLLER CONNECTOR
50 pin header connector J1 connects to the anything I/O card/motion controller. This
can be a male 50 pin header on the top of the 7I47S card or a female 50 conductor header
on the bottom side of the 7I47S depending on 7I47S model.
PIN FUNCTION DIRECTION PIN FUNCTION DIRECTION
1 TX4 TO 7I47S 25 RX4 FROM 7I47S
3 TX5 TO 7I47S 27 RX10 FROM 7I47S
5 TX6 TO 7I47S 29 RX5 FROM 7I47S
7 TX7 TO 7I47S 31 RX11 FROM 7I47S
9 RX0 FROM 7I47S 33 AUX TO 7I47S
11 RX6 FROM 7I47S 35 DIR TO 7I47S
13 RX1 FROM 7I47S 37 /ENA TO 7I47S
15 RX7 FROM 7I47S 39 PWM TO 7I47S
17 RX2 FROM 7I47S 41 TX0 TO 7I47S
19 RX8 FROM 7I47S 43 TX1 TO 7I47S
21 RX3 FROM 7I47S 45 TX2 TO 7I47S
23 RX9 FROM 7I47S 47 TX3 TO 7I47S
49 +5V PWR TO 7I47S
Note: all even pins are grounded. Alternate encoder names omitted for space
AUX 5V POWER
2 pin pluggable terminal P1 can be used to supply 5V power to the I/O terminals on
the7I47S. This is suggested for most applications as the encoders typically will draw more
current than can be supplied via the FPGA flat cable. P1 has the following pinout:
PIN FUNCTION
1 5V
2 GND
7I47S 5
CONNECTORS
RS-422 CONNECTOR P4
Connector P4 is a 3.5MM pluggable screw terminal block with the following pinout:
P4 PIN FUNCTION DIR
1 RX0 TO 7I47S
2 /RX0 TO 7I47S
3 GND FROM 7I47S
4 RX1 TO 7I47S
5 /RX1 TO 7I47S
6 +5V FROM 7I47S
7 RX2 TO 7I47S
8 /RX2 TO 7I47S
9 RX3 TO 7I47S
10 /RX3 TO 7I47S
11 GND FROM 7I47S
12 RX4 TO 7I47S
13 /RX4 TO 7I47S
14 +5V FROM 7I47S
15 RX5 TO 7I47S
16 /RX5 TO 7I47S
17 +5V FROM 7I47S
18 GND FROM 7I47S
19 TX0 FROM 7I47S
20 /TX0 FROM 7I47S
21 GND FROM 7I47S
22 TX1 FROM 7I47S
23 /TX1 FROM 7I47S
24 GND FROM 7I47S
Note that actual signal functions depend on FPGA configuration.
7I47S 6
CONNECTORS
RS-422 CONNECTOR P3
Connector P4 is a 3.5MM pluggable screw terminal block with the following pinout:
P3 PIN FUNCTION DIR
1 RX6 TO 7I47S
2 /RX6 TO 7I47S
3 GND FROM 7I47S
4 RX7 TO 7I47S
5 /RX7 TO 7I47S
6 +5V FROM 7I47S
7 RX8 TO 7I47S
8 /RX8 TO 7I47S
9 RX9 TO 7I47S
10 /RX9 TO 7I47S
11 GND FROM 7I47S
12 RX10 TO 7I47S
13 /RX10 TO 7I47S
14 +5V FROM 7I47S
15 RX11 TO 7I47S
16 /RX11 TO 7I47S
17 +5V FROM 7I47S
18 GND FROM 7I47S
19 TX2 FROM 7I47S
20 /TX2 FROM 7I47S
21 GND FROM 7I47S
22 TX3 FROM 7I47S
23 /TX3 FROM 7I47S
24 GND FROM 7I47S
Note that actual signal functions depend on FPGA configuration.
7I47S 7
CONNECTORS
RS-422/ANALOG CONNECTOR P2
Connector P2 is a 3.5MM pluggable screw terminal block with the following pinout:
P2 PIN FUNCTION DIR TYPE
1 TX4 FROM 7I47S RS-422
2 /TX4 FROM 7I47S RS-422
3 GND FROM 7I47S RS-422
4 TX5 FROM 7I47S RS-422
5 /TX5 FROM 7I47S RS-422
6 GND FROM 7I47S RS-422
7 TX6 FROM 7I47S RS-422
8 /TX6 FROM 7I47S RS-422
9 GND FROM 7I47S RS-422
10 TX7 FROM 7I47S RS-422
11 /TX7 FROM 7I47S RS-422
12 GND FROM 7I47S RS-422
13 NC FROM 7I47S
14 NC FROM 7I47S
15 AUX- FROM 7I47S OPTO OUTPUT16 AUX+ FROM 7I47S OPTO OUTPUT+
17 DIR- FROM 7I47S OPTO OUTPUT18 DIR+ FROM 7I47S OPTO OUTPUT+
19 ENA- FROM 7I47S OPTO OUTPUT20 ENA+ FROM 7I47S OPTO OUTPUT+
21 NC FROM 7I47S
22 ANALOG - TO 7I47S ANALOG REFERENCE 23 ANALOG OUT FROM 7I47S ANALOG OUT (WIPER)
24 ANALOG+ TO 7I47S ANALOG REFERENCE +
Note that actual signal functions depend on FPGA configuration.
7I47S 8
OPERATION
5V POWER
The 7I47S requires ~100 mA of 5V power for operation. This power will increase
based on the number of terminated TX outputs used, up to a maximum of ~400 mA.
Power for the 7I47S logic is normally supplied from pin 49 of the 50 conductor
controller cable. P1 supplies power only to the 5V I/O terminals on P3 and P4 (chiefly for
encoder power).
If W1 is on the left hand position, the controller cable will supply both the logic and
I/O power and P1 can remain unconnected. This mode can be used for testing but it is
suggested that W1 be placed in the right hand position and I/O power be supplied via P1
for most applications.
The power from connector P1 Passes through a 1.3A PTC device before being
routed to the I/O terminals. This limits the total I/O power supplied by the 7I47S to ~800
mA in 0 to 70C ambients.
RS-422 OUTPUT DRIVE
The 7I47Ss outputs are designed to drive singly terminated RS-422 lines or remote
opto-isolator diodes. Maximum output drive is 35 mA. The 7I47S outputs can be used
individually for interfacing single ended loads. Unloaded outputs swing to 5V (Full 5V
CMOS outputs)
INPUT/OUTPUT POLARITY
The RS-422 differential I/O signals consists of a inverted and non-inverted signal
pair for each unbalanced signal on the Anything I/O side of the interface. The TX(N) and
RX(N) signals are the inverted signals. The /TX(N) and /RX(N) signals are the noninverted RS-422 signals. This seemingly inverted convention is used to maintain
compatibility with encoder inputs on other Mesa products and RS-422 serial usage. For
driving single ended loads, either the inverting or non-inverting output may be chosen.
MONITOR / ENCODER LEDS
Monitor LEDs are provided on the RX(N) lines, especially for use with encoder
inputs. These LEDs are arranged in 4 groups of 3 to monitor the A/B/INDEX lines of 4
encoders.
7I47S 9
OPERATION
ANALOG OUT
The 7I47S provides one analog output for spindle control. The analog output is a
isolated potentiometer replacement type device. It functions like a potentiometer with
ANALOG + being one end of the potentiometer, ANALOG OUT being the wiper and
ANALOG- being the other end. The voltage on ANALOG out can be set to any voltage
between ANALOG- and ANALOG+. Polarity and voltage range must always be observed
for proper operation. The voltage supplied between ANALOG+ and ANALOG- must be
between 5VDC an 15VDC with ANALOG + always being more positive than ANALOG-.
The analog output voltage is set by PWM from the controller. The optimum PWM
frequency is approximately 5KHz, Higher frequencies will have lower ripple but more nonlinearity, lower frequencies will have better linearity but more ripple.
A 50% duty cycle PWM signal will result in a 50 % voltage output. The voltage
output is gated by the ENABLE interface signal, and forced to = ANALOG- when enable
is not asserted (enable is active low at the FPGA interface level).
Because the analog output is isolated, bipolar output is possible, for example with
ANALOG+ connected to 5V and ANALOG- connected to -5V, a +=5V analog output range
is created. In this case the PWM output must be offset so that 50% PWM is generated
when a 0V output is required. Note that id bipolar output is used, the output will be forced
to ANALOG- at startup or when ENABLE is false.
ISOLATED OUTPUTS
The 7I47S provides 3 isolated outputs for use for spindle direction control, spindle
enable or other applications. These outputs are OPTO coupler Darlington transistors. They
are all isolated from one another so can be used for pull up or pull-down individually. They
will switch a maximum of 50 mA at 0 to 100 VDC. The ENABLE output is special as it uses
the same signal that enables the analog output. When the analog output is enabled, the
ENABLE OPTO output is on. The DIR and AUX outputs have no special functions so may
be used for any purpose.
7I47S 10
SPECIFICATIONS
MIN MAX UNITS
5V POWER SUPPLY 4.75 5.25 VDC
5V POWER CONSUMPTION --- 400 mA
(all outputs loaded with 130 ohm terminations)
MAXIMUM POWER TO I/O CONNECTORS --- 800 mA
MAXIMUM DATA RATE
C
10 MBIT/S
RS-422 INPUT COMMON MODE RANGE -7 +12 Volts
RS-422 INPUT TERMINATION RESISTOR 131 135 Ohm
RS-422 OUTPUT LOW (24 mA sink)
C
.8 Volts
RS-422 OUTPUT HIGH (24 mA source) VCC-.8
C
Volts
ANALOG REFERENCE VOLTAGE 5 15 Volts
(ANALOG+ - ANALOG-)
ANALOG SUPPLY CURRENT
C
20 mA
ANALOG ISOLATION VOLTAGE
C
500 Volts DC
ANALOG OUTPUT NON-LINEARITY
C
1 % at 5KHz
ISOLATED OUTPUT CURRENT
C
50 mA
ISOLATED OUTPUT SWITCH VOLTAGE
C
100 Volts DC
ISOLATION VOLTAGE
C
500 Volts DC
OPERATING TEMP. 0 +70
o
C
OPERATING TEMP. (-I version) -40 +85
o
C
OPERATION HUMIDITY 0 95% NON-COND
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