CONNECTIONS TO THE I/O DATA PORT
The I/O Data Port connector on the electrical tray within the lower compartment of
the cabinet allows direct connection of appropriate data logging equipment. A suitable
50 way IDC ribbon cable is supplied with the Armfield data logger – order code:
FT74-90IFD.
Where it is required to use the FT74 in conjunction with other control or data logging
equipment, it will be necessary to terminate the connections in a suitable 50 way IDC
connector (standard density, IDC 0.05 inch cable pitch, female socket) to suit the I/O
Data Port at the rear of the console. The following list summarises the connections to
the 50 way I/O Data Port to allow such terminations to be made.
PIN No CHANNEL No SIGNAL FUNCTION
ANALOG OUTPUTS (0-5 Vdc output from the socket):
1 Ch 1 signal Temperature T1 (0 volts = 0°C, 5 volts = 200°C)
2 Ch 1 return
3 Ch 2 signal Temperature T2 (0 volts = 0°C, 5 volts = 200°C)
4 Ch 2 return
5 Ch 3 signal Temperature T3 (0 volts = 0°C, 5 volts = 200°C)
6 Ch 3 return
7 Ch 4 signal Temperature T4 (0 volts = 0°C, 5 volts = 200°C)
8 Ch 4 return
9 Ch 5 signal Pressure P1 (0 volts = 0 bar, 5 volts = 20.0 bar)
10 Ch5 return
11 Ch 6 signal Feed Pump Current (0 volts = 0A, 5 volts = 5A)
12 Ch 6 return
13 Ch 7 signal Feed pump speed (0 volts = 0, 5 volts = 50Hz)
14 Ch 7 return
15 Ch 8 signal Reserved for T5
16 Ch 8 return
ANALOG INPUTS (0-5 Vdc input to the socket):
22 DAC 1 signal Feed Pump speed (remote operation) (0 volts = 0, 5
volts = 50Hz)
23 DAC 1 ref
24 DAC 2 signal Not used
25 DAC 2 ref
DIGITAL OUTPUTS (TTL LOGIC LEVELS FROM THE SOCKET):
28 Dout 1 Mains On
29 Dout 2 Feed Pump On
30 Dout 3 HW Circulator On
31 Dout 4 Pressure Warning
33 Dout 5 Low Level
34 Dout 6 Remote Control Active
35 Dout 7 SSR On
36 Dout 8 spare
55
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