Figure 25: CAN and Pull-Chain wiring for parallel UPS without MOBs
A,B,C
External parallel connectors TB6–8
6
TB7:1: Earth
1
TB6:2: Pull chain
7
TB8:1: CAN Termination 2
2
TB6:1: Pull chain RTN
8
TB8:2: CAN Termination 1
3
TB7:4: CAN High
*) Terminate the first and last UPS with
a jumper
4
TB7:3: CAN Low
**) Connect the shield on one end only
5
TB7:2: CAN GND
NOTE: NC and NO designations on MOB AUX contacts are defined with the
breaker in the OFF (open) position. If the MOB contacts have pigtail leads, use
the same wire gauge to connect to the UPS and use the correct crimp
connections for the wire gauge. External CAN connections between the UPS
cabinets require shielded twisted pair wire. Use twisted pair wiring between the
UPS and MOB AUX contacts. Always confirm contact operation prior to wiring.
5.8
UPS system interface wiring preparation
Control wiring for features and options should be connected at the user interface
terminal blocks located on top front of the UPS, behind the door.
NOTE: Do not connect relay contacts directly to the mains-related circuits.
Reinforced insulation to the mains is required.
When you plan and do the installation, make sure you understand the following
notes:
•
All the interface wiring is provided by the operator.
•
When you install internal interface wiring to MiniSlot terminals, route the
wiring through the internal opening in the MiniSlot communication bay.
•
All signal inputs or remote features require an isolated normally-open contact
or switch (rated at 24 VDC, 20 mA minimum) connected between the alarm
© Eaton Corporation plc 2020. All rights reserved.
Revision: 006
Document ID: P-164000493
75 (126)
Eaton 91PS/93PS UPS 8–40 kW
User’s and Installation Guide
