44
Wiring
• Digital/Relay Outputs
– Digital Output p24Vdc
– Relay Outputs are dry (no power) contacts
Digital Outputs
Terminals 42 and 45 besides being used as Analog Outputs can also be used as
Digital Outputs. Digital Outputs are 24Vdc powered 2-state outputs. In the diagram
to the left a 24Vdc light is wired directly to terminals 42 (DO signal) and 39 (common).
There is a chart in the VLT 5000 Instruction manual right before parameter 319, that explains
the 35 different options for a Digital Output. As an example, in the diagram above, the light
comes on when the drive goes in reverse.
Relay Outputs
Relay Outputs have the same 35 options as the Digital Outputs but without any
power, they are “dry” contacts. There are 2 relays in the VLT 5000. The most commonly
used relay is referred to as Relay 1, because it uses terminals 01 (common), 02 (NO), and
03 (NC). These terminals are not on the control card but on the AC side of the drive.
Because they are dry contacts, 24Vac, 120Vac or 240Vac (max of 2 amps) power can go
through the relay to energize a coil, as diagramed on the right. parameters 324 ON delay,
and parameter 325 OFF delay, give the ability to delay switching up to 600 seconds.
The other Relay, referred to as Relay 4 uses terminals 04 (common) and terminal 05
(NO), which is on the control card. This limits the power that can go through this relay to a
maximum of 50Vac and 1 amp. There are no parameters for switching delays on Relay 4.