Eaton D85 Series Instructions

Instructions for D85 Series Alternating Relays
READ INSTRUCTIONS BEFORE INSTALLING OR OPERATING THIS DEVICE. KEEP FOR FUTURE REFERENCE.
Potentially hazardous voltages are present. Turn off all power supplying
this equipment before connecting or disconnecting wiring.
Installation & Wiring
Mount the appropriate 8 or 11 pin octal socket in a suitable enclosure. Wire the socket per one of the
diagrams in Figure 1. Any type of switch (float, manual, timing relay, pressure, or one with an isolated
contact) can be used.
NOTE: If you are using the same Control Voltage for both the Alternating Relay and the two loads, you
must add a jumper between Terminals 1 & 5 on the SPDT unit or Terminals 2, 6 & 10 on the
DPDT unit. If using multiple switches on the DPDT cross-wired units, check to see the proper
sequence of switch closures is followed, i.e., LEAD before LAG, STOP before LEAD, etc.
Input
Voltage
L2 L1
Control
Switch
4 5
3
6
2 7
1 8
Load A: Pin 2
Load B: Pin 8
SPDT
Figure 1. Wiring Diagrams
If the unit has the low-profile selector switch, set this switch to "ALTERNATE" for normal operation. In
this mode, the unit will operate as a normal Alternating Relay, alternating between the two loads on
each subsequent closing and opening of the control switch. Setting the selector switch to either "LOAD
A" or "LOAD B" will lock the unit to either one of the loads. By locking the Alternating Relay to one load,
the other load can be removed for service without rewiring the first load for continuous operation.
When the selector switch is locked in either the LOAD A or LOAD B
position, it does not disconnect voltage from the equipment to be serviced.

Typical Installations

SPDT and DPDT Alternating Relays
L1
Control
Switch
Figure 2. Typical Installations for SPDT and DPDT Alternating Relays
In the OFF state (Standard Installation), the Control Switch is open, the Alternating Relay is in the
LOAD A position, and both loads (M1 & M2) are off. When the Control Switch closes, it energizes the
first load (M1). The red LED marked "LOAD A" glows. As long as the Control Switch remains closed,
M1 remains energized. When the Control Switch opens, the first load (M1) is turned off and the Alter-
nating Relay toggles to the LOAD B position. When the Control Switch closes again, it energizes the
second load (M2). The red LED marked "LOAD B" glows. When the Control Switch opens, the second
Effective 03/07
!
Input
Voltage
L1 L2
Control
Switch
6
5 7
4 8
3 9
2 10
1 11
Lead
Load A: Pins 3 or 11
Load B: Pins 1 or 9
DPDT
DPDT Cross-Wired
!
SPDT
1
2 M1
5
8 M2
4 3
Standard Installation
WARNING
Input
Voltage
L1 L2
4 5
3 6
Lag
Load
2 7
B
1 8
Load
A
WARNING
L1
L2
O/L
O/L
Control
Switch
Off
Anti-Bounce Installation
IL04906001E
Input
Voltage
L1
Stop
4 5
3 6
Lag
2 7
1 8
Lead
DPDT Cross-Wired for 3 Switches
L2
M2
M2
M1
M1
SPDT
1
2
5
8
4 3
L2
Load
B
Load
A
1