SPECIFICATIONS SD39RIO-1
January 2001
6-2
6.3 Electrical Specifications
Table 6-3 lists the electrical specifications for the Remote I/O Rack.
Table 6-3 Remote I/O Rack Electrical Specifications
Specification Parameter Value
Physical Structure Redundant A and B Buses
IOBUS Length, Node-to-Node
Redundant APACS+ or
QUADLOG System
1500 ft. (460 m) maximum
(Extendable with fiberoptics)
IOBUS Length, Non-
Redundant APACS+ System
1500 ft. (460 m) maximum
(Extendable with fiberoptics)
Data Transmission Rate 1 Mbps
Media Specification IEEE RS-485
Media Access Master to Slave
IOBUS
Architecture
IOBUS Capacity 1 control module plus up to 39 I/O modules
Rack Address Address Number 1 to 16; Set by Thumbwheel Switch (SW1)
Slot Address Slot Range 1-4 standalone or 7-10 extension rack, Set by
Slot Address Switch (SW2)
Air Displacement 25 to 40 cfm Recirculation Fans
Input Voltage 24 Vdc
Backplane Power Bus A
24 Vdc ±10%
Backplane Power Bus B
24 Vdc ±10%
APACS+ or
QUADLOG I/O
Module Input Power
Backplane Power Bus C
24 Vdc ±10%
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