SI 675
Issue B
EDI 8262
Telescopic cranes with derrick pressure sensors CALIBRATION W2245
6
2.6.1 The W2245 input/output board (I/O Board)
The input/output (I/O board) board includes all the wire connections. On this
board, signals are conditioned to be legible for the processor, and the power
supply voltage is conditioned from an input range of 11 to 28 VDC to 5 VDC
to supply both the processor and the sensors.
The reduced voltages and the processed signals from the sensors are
transmitted to the CPU board via a flat ribbon connector. This connector can
be unplugged when the power is OFF by pulling open the side clamps of the
connector on the board.
Also on this board are two fuses, F1 protects the supply voltage to the unit,
use a 2 amp 5x20mm to replace. Fuse F2 protects the VP terminals used to
drive external switches and amplifiers. Use a 1 amp 5x20mm to replace.
There is a dry contact relay for both lockout and external alarm. It has a 2
amp 24 VDC rating. It may be used to control a slave relay. The terminals
available are common (COM) , normally open (NO) and normally closed
(NC). One other relay output driver (OUT1) exists and is used in special
applications to drive additional external relays.
There is a serial communication port RS 232 on the terminal identified as
JP1. This port is for future use.
