
Tunnel Master® wbc Installation Guide
Page 11
Input Board Terminal Blocks
ID
Terminal Block
Input Name
Description
1
Pulse Switch
PULSE SINK
When using a normally open, two-wire pulse
switch, use terminals marked PULSE SINK and
PROX GND.
PROX GND
See "Pulse Switch Wiring" on page 22.
PROX POWER
SINK
When using a normally open three-wire pulse
switch, use terminals marked PROX POWER,
PULSE SINK, and PROX GND. System provides
18 V DC power.
GND
See "Pulse Switch Wiring" on page 22.
POWER
When using a normally closed three-wire pulse
switch, use terminals marked PROX POWER,
PULSE SRCE, and PROX GND.
PULSE SRCE
See "Pulse Switch Wiring" on page 22.
GND
Figure 4. CPU Board Terminal Blocks
LEDs are available for all the I/Os including the RS-232/485 connections.
LED indicators display the status of inputs. The main status LEDs include the following:
• LED1–Logic
• LED2–Auto pulse
• LED3–6 Reserved
• LED7–Chain travel
• LED8–Conveyor Status