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15
Fuse Installation:
It is recommended that the Model 3984 be protected with
an external fuse. The amperage rating of the fuse depends on the AC line
voltage used to power the module as shown in Chart 3. In a multi-control
system, each module should have a separate fuse. (SEE CAUTION BELOW.)
Chart 3 – Recommended AC Fuse Value
Line Input
Fuse Value
Fuse Type
Manufacturer P/N
115 VAC
.062 Amp
Slow Blow
Littlefuse 313.062
230 VAC
.032 Amp
Slow Blow
Littlefuse 313.031
CAUTION
In installations where one side of the AC supply is at ground potential, only
the hot side will require a fuse. If both sides of the AC line are at a potential
with respect to ground, each line will require a separate fuse.
Figure 7 – AC Power Connections
TB1
4
3
2
1
115 VAC
50/60 HZ
230 VAC
50/60 HZ
1
2
3
4
AS SHOWN
TERMINALS 1 TO 2 AND 3 TO 4
USE JUMPERS TO CONNECT
TB1
AS SHOWN
TERMINALS 1 TO 2 AND 3 TO 4
USE JUMPERS TO CONNECT