Sunix RS-232/422/485 Serial Card Manual

RS-232/422/485 PCI/PCIe Card
Quick Installation Guide (Universal)
Please visit https://www.sunix.com with product model for detail and latest manual/driver update
Introduction
SUNIX RS-232/422/485 Serial Card allows users to expand RS-232/422/485 ports on PC-based
system. Each serial port achieves data rates up to 921.6 Kbps and utilizes UART with an on-chip
128-bytes hardware FIFO buffer for reliable, high-speed serial I/O. With SUNIX patented
Auto-Switching RS-422/485 and RS-485 AHDC™ technology, user can easily manage different
serial interfaces selection and RS-485 signal direction control. We provided with 2KV
IEC6100-4-5 Level 3 Surge Suppressor and 15KV IEC61000-4-2 ESD Discharge Transceiver.
Besides, board supports a wide variety of operating systems, including Windows and Linux. It
is the best serial communicating solution for industrial and harsh environment applications.
1. Hardware Installation
SAFETY FIRST
To avoid damages, please make sure to remove any power connection before card installation,
and follow the detailed steps given below before inserting the card into your computer.
1-1 PCI Express Card
Step 1: Turn your PC's power off, and shut off the power to any peripheral.
Step 2: Remove the power plug from the plug socket.
Step 3: Remove the cover from the computer case.
Step 4: If fitted. Remove the metal cover plate on the rear of a free PCIe slot.
Step 5: Insert PCI Express Industrial I/O Control Board into the free PCIe slot
and screw it firmly on the bracket side.
Step 6: Place the cover back onto the computer.
Step 7: Insert the plug into the plug socket.
1-2 PCI Card
Step 1: Turn your PC's power off, and shut off the power to any peripheral.
Step 2: Remove the power plug from the plug socket.
Step 3: Remove the cover from the computer case.
Step 4: If fitted. Remove the metal cover plate on the rear of a free PCI slot.
Step 5: Insert PCI Industrial I/O Control Board into the free PCI slot
and screw it firmly on the bracket side.
Step 6: Place the cover back onto the computer.
Step 7: Insert the plug into the plug socket.
1-3 M.2 Card
Step 1: Remove the screw attached to the motherboard.
Step 2: Insert M.2 Card tightly into the M.2 slot with 20° angle.
Ver.1
(SUNIX M.2 Card supports Key-M and Key-B slot)
Step 3: Push the M.2 card down to the screw hole.
Step 4: Lock screw on M.2 card that you remove from motherboard in step1.
Step 5: Connect ribbon cable between M.2 card and extension board.
Step 6: Secure the extension board to PC chassis.
1
2
20°
2. Pin Assignment
D-Sub 9-pin male with nuts on cable
PIN DB9M DB25M
DCD 1 8
2
RxD 3
TxD 3 2
DTR 4 20
RS-232
GND 5 7
DSR 6 6
7
RTS 4
CTS 8 5
RI 9 22
Tx+ 2 3
Tx- 1 8
RS-422
or Rx+ 3 2
4-Wire RS-485
Rx- 4 20
GND 5 7
Data+ 2 3
2-Wire RS-485 Data- 1 8
GND 5 7
Note: 8-port RS-232/422/485 Multi-Port Control Card does not build RI signal under the RS-232
communication.
3. Jumper Settings
For RS-422/485 serial communications, when an electrical signal travels through two
different resistance junctions in a transmission line, the impedance mismatch will sometimes
cause signal reflection. Signal reflection causes signal distortion, which in turn will contribute
communication errors. The solution to this problem is to establish the same impedance at the
end of the lines by terminating them with resistors.
Ideally, the two ends of the cable will have a termination resistor connected across the two
wires. Without termination resistors, reflections of fast driver edges can cause multiple data
edges that can cause data corruption. Termination resistors also reduce electrical noise
3
sensitivity due to the lower impedance, and bias resistors (120 ohms for twisted pairs) are
required. The value of each termination resistor should be equal to the cable impedance.
4
3-1. PCI/PCIe Card Jumper Settings
Manufactory default jumper setting is OPEN (disable 120 ohms termination resistors across
the two wires).
5
6
Working model with termination resistor:
RS-422 or 4-Wire RS-485
DB9M SUNIX Host Card
Pin Header 1 5
Tx ＋
1
Tx －
3
5 Rx ＋
6 9
7
Rx －
DB25M
9
1 13
2
4 3-2. M.2 Card DIP Switch Settings
6
SUNIX M.2 PCI Express RS-422/485 Serial board equips independent TX and RX termination
14 25
8
resistors for each serial COM port. User can modify the DIP switch setting to avoid impedance
Pin Header(Pitch 1.0mm)
3
mismatched problem when operate under Multi-drop transmission. Resistors should be
1
2 10
added near the receiving side.
5 1 9
Note: Termination resistor near the receiving side.
7
9
3
1
9
Manufacturer default jumper setting is OPEN (disable 120ohms termination resistors across
the two wires) Please refer to the following table to enable or disable 120ohms termination
resistor for each COM (RS-422/485) port. Each COM port is controlled by a pair of DIP Switch.
Mode
1.
2.
Jumper
Port 1-Rx
Open (Default)
Port 1-Tx
Short
Working model with termination resistor:
2-Wire RS-485
SUNIX Host Card
Device
D ＋ (Tx ＋)
Rx ＋
D － (Tx －)
Rx －
Tx ＋
Tx －
1 2 3 4
(Default)
2 1
IPC-M2202S 1 2 3 4
IPC-M2202SR
IPC-M2204S
IPC-M2204SR
COM Ports
DIP Switch
1 2 3 4
Short
DIP Switch Settings Mode DIP Switch Settings
Manufacturer default
3.
(Disable termination resistor)
1 2 3 4 1 2 3 4
COM1 enables
4.
120 ohms termination resistor
1 2 3 4 1 2 3 4
Device
D ＋
D －
ON
ELECTRICAL
1 2 3 4
ON ELECTRICAL
1 2 3 4
COM2 enables
120 ohms termination resistor
COM1&2 enable
120 ohms termination resistor