User guide

VoiceLift System with PVS 405D • Special Application: Instant Alert 31
NOTE: If the MLC and the PoleVault switcher are using separate power supplies,
ground the C pin of the receiver Rly port to the receiver using a jumper between
the C pin and the ground (
_
) pin on the contact input (CTC), the auxiliary input
(Aux In), or the RS-232 port.
Figure 26. Jumper Wire Connecting the Receiver Relay Port Common Pin
with the Ground Pin of the Contact Port
4. Pull the communication cable to the MLC 104 IP Plus and insert it into one of the MLC
direct-insertion digital I/O ports as follows:
• Insert the black wire into the ground port.
• Insert the red wire into the first available digital I/O port.
Figure 27. Communication Cable Connected to Digital I/O Port 1 and
Ground on an MLC 104 IP Plus Controller