Electro Cam PL-1746 Series - Manual (Page 28)

2-18 Installation
PS-6400 Keypad Installation
Number of Keypads One or two keypads may be connected to a PL-1746 controller as shown in the illustra-
tion below.
Programming Enable The wiring connector on the back of each keypad includes terminals to select Operator
or Master level programming for that keypad. These terminals can be temporarily
jumpered during setup to allow entry of programming access codes, or they can be
switched with a variety of devices including mechanical switches, relay contacts, and
PLC DC outputs. See ENABLE CODES in the programming section for details on pro-
gramming access.
If a solid state device will be activating the Programming Enable terminals, that device
will determine whether sourcing or sinking wiring should be used. For mechanical de-
vices such as jumpers or key switches, either sourcing or sinking wiring may be used.
Programming Enable, Sourcing Programming Enable, Sinking
Programming Access Display Operator Setup Master
Keypad Terminal --- Yes (E2) No Yes (E1)
Password --- Yes Yes Yes
Keypad Wiring
Note:
The PS-6400 keypad is not
designed to be hot-swapped
(plugged or unplugged while
power is ON).
Sinking/Sourcing Defined
Sinking means that when the logic is
true and the output (or input device) is
ON, the output (or input device)
is providing a DC common or ground
to the connected device.
Sourcing means that when the logic
is true and the output (or input device)
is ON, the output (or input device)
is providing a +DC voltage to the
connected device.
This information is important when
interfacing an Electro Cam Corp.
product with another electronic device.
If you are using an Electro Cam Corp.
product input to an Allen-Bradley 1746-
IN16 “sinking” input card* or similar A-
B device, you have to supply a +DC
voltage (Electro Cam Corp.
Sourcing
output) to this card, NOT a DC
common or ground. In these cases,
Sinking is what the card does with the
input voltage; sinks it to common or
ground.
*Other manufacturers include, but not
limited to: Koyo (formerly GE Series
1, Texas Instruments, or Siemens
SIMATIC PLS’s) that use descriptions
similar to Allen-Bradley.