![background image](http://html1.mh-extra.com/html/gardner-denver/delcos-3100/delcos-3100_user-manual_3571327038.webp)
1. DELCOS 3100 Electronics
36
1.7.8
Remote control for enabling on-load
operation
By connecting an external floating contact, the control
system provides the capability of:
•
interrupting the enable for the compressor's on-
load/off-load control ler (1) or
•
connecting an external floating contact for remote
load-on in series with the internal electronic
pressure switch.
Operating principle
Figure 2
Legend:
(1) Compressor's on-load/off-load controller
(2) Internal electronic pressure switch: for setting, see
[CONTROL MENU] menu
(5) Enable switch or external floating contact for remote
on-load
(6) Terminals
•
In normal operation, the compressor's on-load/off-
load controller (1) is governed exclusively by the
system's internal electronic pressure switch (2). The
switching points of the internal electronic pressure
switch (2) are programmed in the [CONTROL
MENU] menu using the [CUT OUT POINT] and
[CUT IN POINT] parameters for Version FS and
[TARGET PRESSURE] for version RS.
•
In the [OPTIONAL INPUTS] menu, program one of
the three programmable inputs to the
[OPERATE_B1] function. As a result, the input
selected with the terminals (6) is now connected in
series with the internal electronic pressure switch
(2).
•
Connect the external switch (5) to the terminals (6).
Assignment of terminals (6) depending on input
selected:
[OPTION 1]
Terminals X3.15/X3.18
[OPTION 2]
Terminals X3.16/X3.19
[OPTION 3]
Terminals X3.17/X3.20
Note
By connecting the two pressure switches (2) + (5) in
series, it may be necessary to increase the setting of
the internal electronic pressure switch (2) in the
[CONTROL MENU] menu.
1.7.9
Combined remote control of on-
load/off-load operation and
enabling of on-load operation
(version FS only)
You can combine the two procedures for activating on-
load/off-load operation and enabling on-load operation.
Example
Figure 3
Legend:
(3) Load requested by higher-order controller
(7) Active signal from higher-order controller
(8) Higher-order control system
•
In the example, a higher-order controller (8) is
connected to DELCOS 3100.
•
In the event of controller (8) failure, contact (7)
switches DELCOS 3100 to internal operation (as
shown above).
•
When the higher-order controller (8) is active and
not malfunctioning, it withdraws the on-load enable
from DELCOS 3100 at contact (7) and now controls
the compressor autonomously through ist own load
request (3).