Ascon tecnologic AC3nP, Installation Manual, Page: 28 / 38

AC
3
- Installation Manual
22
3-4-6 J, K, L, N, R, S, T Thermocouple Type Inputs
• To extend the connection, use always compensation
cable of the correct type for the thermocouple used;
• When present, the shield must be connected to a
proper earth (at only one end).
3-4-7 NTC Inputs
3-4- 8 Pt100, Pt1000 (2 wires) Inputs
• When 2 wires system is used and the distance
between the module and the sensor is 15 m, the use
of a 1.5 mm
2
section cable produces a 1°C (1.8°F)
measure error.

WARNING
When AI1... AI4 are configured as: TC, NTC, Pt100 or Pt1000, is MANDATORY to short-cir-
cuit the terminals (+, -) of the unused channels.
3-5 Digital Input Connections
3-5-1 Power supply for Digital Channels (connectors X5 and X7)
• 24 Vdc Digital Channels Power Supply;
• These 2 power supply terminals are internally
connected.
+ - - - - + + +
AI1 AI2 AI3 AI4
TC Inputs
TC TC TC TC TC TC TC TC
NTC Inputs
+ - - - - + + +
AI1 AI2 AI3 AI4
PT100/PT1000 2 wires Inputs
A
B
b
A
B
b
A
B
b
A
B
b
+ - - - - + + +
AI1 AI2 AI3 AI4
Upper side
Front
X5
+ 24 V -
X7
+ 24 V -
24 Vdc Channels Power supply