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DAQ

Serial Communication

ACCES I/O has Communication Cards for all of the popular protocols

ranging from a single port to eight ports on a single card.

 
PCI Express Bus Serial Products
  SERIAL PORTS OPTIONS
Products RS-232 RS-422 RS-485 Baud PROT CFG LOW PROF LRG FIFO Connector RoHS
PCIe-COM-8SM
New Product!
8 Software Selectable 921.6k EEPROM Optional MD2* Yes Cabled DB9
PCIe-COM-4SM
New Product!
4 Software Selectable 921.6k EEPROM Optional MD2* Yes Cabled DB9
PCIe-COM232-8 8     921.6k   Optional MD1** Yes Cabled DB9
PCIe-COM232-4 4     921.6k   Optional MD1** Yes Cabled DB9
PROT CFG = protocol configuration LOW PROF = low profile form factor * MD2 = Low Profile PCI/PCIe spec ** MD1 = Smallest PCI/PCIe low-profile specification = Optionally available RoHS Ready

 

PC/104 Bus Serial Products
  SERIAL PORTS OPTIONS
Products RS-232 RS-422 RS-485 Baud PROT CFG ADDR CFG LRG FIFO XT
104-COM232-2 2     230.4k   Jumper Yes Yes
104-COM232-4 4     230.4k   Jumper Yes Yes
104-COM232-8 8     230.4k   Jumper Yes Yes
P104-COM232-8 8     460.8k   Software Yes Yes
104-COM-2S   2 2 115.2k Jumper Jumper Yes Yes
104-ICOM-2S*   2 2 115.2k Jumper Jumper Yes Yes
104-COM-2SM 2 2 2 921.6k Jumper Jumper Yes Yes
104-COM-4S   4 4 921.6k Jumper Jumper Yes Yes
104-COM-4SM 4 4 4 921.6k Jumper Jumper Yes Yes
104-COM-8S   8 8 921.6k Jumper Jumper Yes Yes
104-COM-8SM 8 8 8 921.6k Jumper Jumper Yes Yes
PROT CFG = protocol configuration | XT = extended temperature option
* optically isolated

 

PCI Bus Serial Products
  SERIAL PORTS OPTIONS  
Products RS-232 RS-422 RS-485 Baud PROT CFG LOW PROF LRG FIFO RoHS
LPCI-COM-1S   1 1 460.8k Jumper Yes Yes  
PCI-ICM-1S*   1 1 460.8k Jumper   Yes  
PCI-ICM-2S*   2 2 460.8k Jumper   Yes  
PCI-422/485-2   2 2 460.8k Jumper   Yes  
PCI-COM-2S 2 2 2 460.8k Jumper   Yes  
PCI-COM232/2 2     115.2k Fixed      
PCI-COM232/4 4     115.2k Fixed      
LPCI-COM232-4 4     921.6k Fixed Yes    
LPCI-COM-4SM 4 4 4 921.6k Jumper Yes    
PCI-COM422/4   4   460.8k Fixed   Yes  
PCI-ICM422/4*   4   460.8k Fixed   Yes  
PCI-COM485/4     4 460.8k Fixed   Yes  
PCI-ICM485/4*     4 460.8k Fixed   Yes  
LPCI-COM232-8 8     921.6k Fixed Yes    
LPCI-COM422-8   8   921.6k Fixed Yes Yes
LPCI-COM485-8     8 921.6k Fixed Yes Yes
LPCI-COM-8SM 8 8 8 921.6k Jumper Yes    
PROT CFG = protocol configuration | LOW PROF = low profile form factor
* optically isolated | = Optionally available RoHS Ready
 
Serial Converter Products
MODEL DESCRIPTION RoHS
CONV232/485 RS-232 to RS-485 Serial Communications Adapter  
CONV232/422 RS-232 to RS-422 or four-wire RS-485 Serial Communications Adapter  

 

 
USB Serial Products
MODEL DESCRIPTION RoHS
USB-232,
USB-422
and USB-485
Add a single RS-232, RS-422 or RS-485 serial port to any USB equipped computer
USB-COM-2SM Two-port USB to serial RS-232/422/485 adapter
USB-FLEXCOM4 Four-Port Serial Communications adapter for Universal Serial Bus  
USB-COM232-4A Four-Port Serial RS-232 Communications adapter for Universal Serial Bus  
USB-IIRO4-2SM Two-Port USB to Serial RS-232/422/485 adapter with 4 Electromechanical relays and 4 optically isolated inputs.  

 

 
Ethernet Serial Products
MODEL DESCRIPTION RoHS
eNET-232-1 Single-Port Ethernet-to-Remote RS-232 Serial Interface Device  
eNET-422-1 Single-Port Ethernet-to-Remote RS-422 Serial Interface Device  
ETH-01
New Product!
Single-Port Ethernet-to-Remote RS-422/-485 Embeddable / OEM Serial Interface Module  

 

 
 
PC-Card / PCMCIA Serial Products
MODEL DESCRIPTION RoHS
PCM485 PCM485 PCMCIA RS-422/485 Serial Communications Card  

 

 
 
Watchdog Products
MODEL DESCRIPTION RoHS
WDG-SIO Watchdog Timer and RS422/485 Serial Communications Card  
WDG-2S Watchdog Timer and Dual RS422/RS485 Serial Communications Card  


Baud Rate vs Cable Length*
Baud Rate Standard Divisor Divisor x4 Divisor x8 Maximum Differential Cable Length*
921600 - - 1 250 ft.
460800 - 1 2 500 ft.
230400 - 2 4 1400 ft.
153600 - 3 6 2500 ft.
115200 1 4 8 3000 ft.
57600 2 8 16 4000 ft.
38400 3 12 24 4000 ft.
28800 4 16 32 4000 ft.
19200 6 24 48 4000 ft.
14400 8 32 64 4000 ft.
9600 12 48 96 4000 ft.
4800 24 96 192 4000 ft.
2400 48 192 384 4000 ft.
1200 96 384 768 4000 ft.
*These are theoretical maximums based on typical conditions and good quality cables based on the EIA 485 and EIA 422 standard for balanced differential drivers.