IMP Pumps NMTC module - Manual (Page 8)

8
Terminal
Designation Description
MODE
Mode selection rotary switch. Used to configure mode of operation for the circuit. See
section 4.3 “Module mode selection”.
LED1 / LINK
Slowly blinking when module is powered.
Blinking fast when Modbus Error
Permanently lid when Ethernet link established.
Ethernet 10BASE-T RJ-45 connector.
LED2 / ACT Indicates Ethernet activity or Modbus activity.
B/D- RS-485 negative data signal for Modbus.
A/D+ RS-485 positive data signal for Modbus.
SET1 / RUN Control signal 1.
COM / 0V RS-485 common and analog input common (ground).
SET2 / MAX Control signal 2.
SET3 / FB Control signal 3.
NC Normally closed relay contact. Opens when relay is active.
C Relay common contact.
NO / OK Normally open relay contact. Closes when relay is active.
3.1 Connection considerations
• All cables connected must be heat-resistant to at least +85°C.
• All cables connected must be installed in accordance with EN 60204-1.
• All wires to the communications module must be connected to the terminals or cut. No loose wiring
permitted.
• If voltages over 24VAC/DC are possible on NO, C, NC terminals:
WARNING!
• Wires should be routed so no wire crosses the center barrier.
• Relay cable (NO, C, NC) must be separated from all other wiring with reinforced
insulation. Cable outer layer must not be stripped longer than 15mm. See “Cabling
preparation” below.
Cabling preparation
max. 15 mm
8(7-10)mm
0.25 - 1 mm 2
Cable for the screwless terminals should
be prepared as shown on the left.
Tools
2.4mm wide flat-bladed screwdriver is
needed to press the terminal spring
while inserting the cable.
Same tool is also used to rotate the
Mode switch.