SL-24533.book(SL-24533 FC.fm) - Emerson Network Power

7.0 OPEN COMMS – DISCRETE INPUT OPTION (OC-DI) (INPUT CONTACT
ISOLATOR)
7.1 Introduction
This Option will allow the user to bring up to 8 outside signals into the Npower UPS. A customer contact closure
(no voltage) is needed to activate the relay. The UPS can then be programmed to alarm on receipt of one or more
of these signals and to display the user settable name of the signal source. In addition the signals can be set to
trigger NO or NC relays on the Open Comms Discrete Output Option (OC-DO), Section 6, if the system is configured
with this option.
7.2 Installation
Physically install the OC-DI board in the Npower UPS in accordance with the instructions in Section 4 of this
manual. This option can be installed in Locations 1, 2, 3 or 4. Once installed, the OC-DI board needs to be connected
to the CANbus. If it is the first option installed, install in location 4 (See Figure 3), and utilize the system
CANbus cable that is coiled in the center of the option area. If another option has been previously installed and
connected to the system CANbus cable, use either the short (77-814000-03) or the long (77-814000-04) jumper
cable as required. Connect this system harness to the P966 connector on the left side of the OC-DI board.
Bring up to 8 pairs of wires (one pair for each customer signal, up to 16 wires total) to the Npower UPS from the
customers Normally Open or Normally Closed sources. These wires should be delivered to the Npower in appropriately
sized conduit. The wires connect to the UPS through the cable landing area in the upper or lower front of
the UPS (Figure 3). Wires should be routed down the right side of the option area and then at a 90 degree angle
to the option board. Next, connect the wire pairs to TB1.
All user connecting cables are to be provided by others and are to be 16 gauge 300 V Min. tinned copper stranded
wire. All option connections are made in the option section. Customer wires route through option plate.
32 Open COMMS – Discrete Input Option (OC-DI) (Input Contact Isolator)