4
LED 7
LED 5
LED 8
LED 6
LED 3
LED 2
LED 1
LED 9
LED 4
1
2
3
on
4
MAC:
18E80FXXXXXX
asdesaxtff
C NO NC
RL 1
C NO NC
RL 2
C NO NC
RL 3
C NO NC
RL 4
1 2 3 4
NETWORK
1 2 3 4
NETWORK
VIKING
ELECTRONICS
HUDSON, WI 54016
NETWORK ENABLED
RELAY CONTROLLER
MODEL RC-4A
©
VIKING
1
IN1 C
IN2 IN3 C
IN4
2
3
4
5
6
LOGIC LEVEL
PROGRAMMING
RESTORE DEFAULTS
DEBOUNCE
POWER 12V DC
RELAY 1
RELAY 2
RELAY 3
RELAY 4
1
2
3
4
5
7
8
9 10 11 12
6
STATUS
LED
1
2
3
on
4
C. DIP Switch Programming
Switch
Position Description
1
OFF
Logic Level 12V with a 6V trip point
1
ON
Logic Level 5V with a 2.5V trip point
2
OFF
Programming access is enabled
2
ON
Programming access is blocked
3
OFF
Normal operation
3
ON
Restore factory programming defaults
4
OFF
Normal email notification
4
ON
10 second email debounce
Note:
The default setting for all dipswitches is OFF.
Switch 1 – Logic Level
This dipswitch lets you set the logic level for the contact closure inputs. In the default OFF position, the logic
level is 12V with a 6V trip point, which is best for long, relatively noisy runs. The higher trip point makes the
input more immune to noise. Closing the switch sets a 5V logic level with a 2.5V trip point. This is the preferred
level for a short run to another device with a similar logic level.
Switch 2 – Programming
Dipswitch 2 allows programming on the Set Defaults and Network Configuration pages. It works in conjunction
with the user’s authentication level. If the user is logged in as a Guest, no programming is possible. The
programming pages can be accessed, and the programmable values are visible in their textboxes, but they
are greyed out and can’t be changed. It’s when the user is logged in as an Administrator that Dipswitch 2
makes a difference. If Dipswitch 2 is OFF, programming is permitted. If Dipswitch 2 is ON, programming is
blocked, even when the user is logged in as an Administrator. This hardware switch provides an additional
level of security against hacking. To take advantage of this feature, turn Dipswitch 2 ON when programming
is completed to lock the settings. If security is less of a concern, Dipswitch 2 could be left OFF and remote
programming will always be permitted if the user is an Administrator.
Switch 3 – Restore Defaults
Dipswitch 3 allows a partial or complete return to factory defaults. To start the return to defaults procedure,
turn Dipswitch 3 on. The Status LED will go out for four seconds, and then start flashing at a slow rate for
eight seconds. If Dipswitch 3 is turned off during this eight seconds, the programmed usernames, passwords,
and network settings will be returned to their default values, but any other programmable settings will remain
unchanged. The Status LED begins fast-flashing when Dipswitch 3 is turned off, and after a few seconds it is
lit steady. The return to defaults procedure is complete. If Dipswitch 3 is not turned off during the eight-second
slow-flash window, the Status LED starts flashing at a faster rate. Turning Dipswitch 3 off at this point sets all
RC-4A
programmable parameters to their factory settings. The Status LED starts fast-flashing for a few
seconds and then is lit steady, and the return to defaults procedure is complete.
Switch 4 – Email Debounce
With Dipswitch 4 OFF, an input state change results in the
RC-4A
sending an email with minimal delay. With
Dipswitch 4 ON, a 10 second debounce is required in order for the email to be sent. If the state change lasts
less than 10 seconds, an email is not sent.
