31-4 9440300990
Specifications DECS-250
RS-232
Type ................................................. RS-232 (for external autotracking)
Interface ........................................... DB-9 connector
Location ............................................ Right side panel
RS-485
Type ................................................. RS-485, half duplex
Interface ........................................... Spring type terminals
Location ............................................ Left side panel
Terminals.......................................... RS-485 A, B, C
Ethernet, Copper (style xxxxx1x)
Type ................................................. 100Base-T copper
Interface ........................................... RJ45 jack
Location ............................................ Right side panel
Ethernet, Fiber Optic (style xxxxx2x)
Type ................................................. 100Base-FX, multimode
Interface ........................................... ST type connectors for RX and TX bnc style male connectors
Maximum Length (Half-Duplex) ....... 1,310 ft. (399 m)
Maximum Length (Full-Duplex) ........ 6,600 ft. (2,011 m)
Location ............................................ Right side panel
Controller Area Network (CAN)
Type ................................................. SAE J1939 message protocol
Interface ........................................... Spring (style xxxSxxx) or compression (style xxxCxxx) type terminals
Location ............................................ Right side panel
Terminals.......................................... CAN 1 H, L, SH
CAN 2 H, L, SH
Differential Bus Voltage .................... 1.5 to 3 Vdc
Maximum Voltage ............................ –32 to +32 Vdc
Communication Rate ........................ 250 kb/s
IRIG Time Synchronization Input
Standard ........................................... 200-98, Format B002, and 200-04, Format B006
Input Signal ...................................... Demodulated (dc level-shifted signal)
Logic High Level ............................... 3.5 Vdc, minimum
Logic Low Level ............................... 0.5 Vdc, maximum
Input Voltage Range ........................ –10 to +10 Vdc
Input Resistance .............................. Nonlinear, approximately 4 kΩ at 3.5 Vdc,
3 kΩ at 20 Vdc
Response Time ................................ <1 cycle
Terminals.......................................... IRIG+, IRIG–
Contact Outputs
Make and Break Ratings (Resistive)
24 Vdc ........................................ 7.0 Adc
48 Vdc ........................................ 0.7 Adc
125 Vdc ...................................... 0.2 Adc
120/240 Vac ............................... 7.0 Aac
Carry Ratings (Resistive)
24/48/125 Vdc............................ 7.0 Adc
120/240 Vac ............................... 7.0 Aac