Gilderfluke&Co Pb-DMX - Manual (Page 14)

Each relay module is protected by a standard five millimeter diameter, twenty milli-
meter long (5x20 mm) glass fuse rated at five amps (Littelfuse part number 217005 or
equivalent). These can be removed and replaced from the relay modules without using
any tools. We chose to build the Pb-DMX/32 around the Grayhill ʻG5ʼ relay modules be-
cause of these fuses. Other similar relay modules use non-standard fuses that are diffi-
cult to find and/or replace.
Each relay module has two screw terminals on the mounting board for you to con-
nect whatever you will be controlling. The first relay uses screw terminal positions #1
and #2. The second relay uses #3 and #4, etc.. There are no connections between the
secondary sides of any two relay modules. This allows you to freely mix both AC and
DC relay modules on the same mounting board.
One of the two wires that control your load will need to be routed into one of these
screw terminals, and out the other in order to control your load. Alternating Current (AC)
loads can use either of the two screw terminals interchangeably:
Direct Current (DC) loads will need to observe polarity. The ʻoddʼ numbered screw
terminals (#1, #3, #5, etc.) are the positive terminals. The ʻevenʼ numbered screw termi-
nals (#2, #4, #6, etc.) are the negative screw terminals.
To switch the positive side of your load, connect the
positive lead from your high current power supply to
to the ʻoddʼ numbered screw terminal(s). Your load(s) are
then connected between the the ʻevenʼ numbered screw
terminal(s) and the negative lead of your high current
power supply.
To switch the negative side of your load, connect the negative lead from
your high current power supply to to the ʻevenʼ numbered
screw terminal(s). Your load(s) are then connected be-
tween the the ʻoddʼ numbered screw terminal(s) and
the positive lead of your high current power supply.
There are ʻflybackʼ diodes in the DC output mod-
ules. If you have the polarity reversed, current will flow
through this diode and your load will never turn ʻoffʼ. If
you have an output that never turns off, it will either be
a blown relay module, or it has been wired in reverse.
Line In
2
1
Screw Terminals
Load
AC Neutral
AC Hot
Line In
2
1
Screw Terminals
Load
AC Neutral
AC Hot
2
1
Screw Terminals
Load
+ -
Power Supply
2
1
Screw Terminals
Load
+ -
Power Supply
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Pb-DMX/32 v1.+ Manual / 10/31/13 / page 8 of 37