Digital Inputs; Analog Input/Output Pc Board - ABB AW400 Series Instruction Manual

3.4.2.2

Digital Inputs

AW400 digital input are represented in Fig. 6. Characteristics of digital input cables are:
•
shielded
•
two-cores, section 0.5 – 1.0 mm2
•
the shields has to be connected to ground shield terminal strip inside AW400.
Digital inputs
Fig. 6 – Digital inputs terminal barrier
3.4.3

Analog input/output pc board

Refer to each sensor I.B. for the colour/number codification of the sensors wires. The Pt100 shield and the
sensor shield, if present, has to be connected to ground shield terminal strip, inside AW400. Pleases notice
that, for pH and ORP sensors it is recommended to fix the cable near the sensor so that it doesn't move at the
outlet of the cable gland. The wear of the cable at that point is thus prevented.
The 0–20 mA or 4–20 mA signal INPUT is on terminals 5 and 6: when these terminals are used for the 0/4–20
mA INPUT, install a 100 Ω resistor (0.1 % accuracy) across terminals 5 and 6.
Use two cores shielded cables for 4–20 mA output signals, section of each conductor 0.5 – 1.0 mm
shields to the shield ground terminal strip inside AW400.
Digital input
(+)
Digital input
1
(+)
2
Terminals: 3-8 not used
Terminals: 9-12 = +24
Terminals: 13-16 0v (common)
USE ANY ONE OF THE 0v (COMMON) TERMINALS (13-16) TO
TERMINATE THE DIGITAL INPUT (-) WIRES
Expanded function power supply
2
; connect
17