Allen-Bradley 1394 - DH-485 Specifications; Flex I;O Specifications

Publication 1394-5.0 — May 2000
Specifications A-13
DH-485 Specifications
The table below lists the DH-485 specifications for the system
module (1394x-SJTxx-C-xx, -L-xx, and -T-xx systems).
Flex I/O Specifications
The table below lists the Flex I/O specifications for the system
module (1394x-SJTxx-C-xx, -L-xx, and -T-xx systems).
The: Is:
Number of DH-485 channels One; replaces serial port B when used
Channel type Optically isolated half-duplex RS-485
Baud rate 9,600 or 19.2 kbaud (user-selectable)
Front panel connectors Two RJ-45 jacks (+24 V is not provided)
RS-485 User-selectable 220 ohms resistor via internal switch
Node address User-selectable between 0 and 31 inclusive
Node type Token-passing master
Accessible data type • One binary file (B3) for up to 16,384 bits
• One integer file (N7) for up to 1,024 16-bit values
• One floating point file (F8) for up to 512 32-bit values
• One ASCII string file (A) for up to 2,048 characters
• Nine user-configured files; each can be individually
configured as any of the above types or as a BCD file for
floating point simulation
The: Is:
Maximum number of Flex I/O
modules
8
Compatible modules • 1794-IB16; 16 24V DC discrete inputs
• 1794-IA8; 8 115V AC discrete inputs
• 1794-IE8; 8 current/voltage analog inputs
• 1794-OB16; 16 24V DC discrete outputs
• 1794-OA8; 8 115V AC discrete outputs
• 1794-OE4; 4 current/voltage analog outputs
• 1794-IE4XOE2; 4 current/voltage analog inputs and 2
current/voltage analog outputs
• 1794-IB10XOB6; discrete combination module
• 1794-OW8 relay output module
• 1794-IF4I isolated analog input module
• 1794-OB16P discrete output (protected)
Interface Direct; no 1794-ASB or other adapter required