Measurement Computing PC104-PDISO8 - Manual (Page 11)

3.2.1 ON & OFF for FORM C RELAYS
O
On means that FORM C relay common is in contact with the Normally-Open
(NO) contact.
O
Off means that FORM C relay common is in contact with the
Normally-Closed (NC) contact.
3.2.2 ON & OFF FOR FORM A RELAYS
O
On means that FORM A relay common is in contact with the Normally-Open
(NO) contact.
O
Off means that FORM A relay common is open.
3.3 INPUT REGISTER
The isolated input register is located at BASE address + 1.
WRITE = NO FUNCTION
READ = STATUS: Read the status of the isolated inputs. A one in the input bit
position indicates that a voltage is present at the input.
INPUT # 7 6 5 4 3 2 1 0
BIT No. 7 6 5 4 3 2 1 0
HEX 80 40 20 10 8 4 2 1
DECIMAL 128 64 32 16 8 4 2 1
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