Tunnel Master® wbc Installation Guide
Page 15
The connector in JP29 enables normal operation on the input board and is the default configuration.
This jumper is used to select the input voltage for the 48 inputs. Customers can choose a separate external
voltage for the inputs.
When configured to use external (E): The voltage must be supplied to the common, and then
switched out -- Recommended.
When configured to use internal (I): The voltage supplied on the INTERNAL 12 V AC POWER INPUT
TERMINAL connector will be used for dry contact operation -- Not Recommended.
Transformer Selection
Figure 8. Transformer Selector on the Input Board
Auxiliary Input Internal Voltage Wiring- Dry Contact
ICS does not recommend internal voltage for Auxiliary Inputs. ICS recommends external voltage.
L
N
COMMON
NORMALLY
OPEN
Alternate symbol for N.O. Switch
Examples:
Low Air Pressure
Low Hydraulic
High Water
or other Sensing Device
Contacts
C
OM
1 -
48
Auxiliary Input Relay Terminal Strip
Figure 9. Auxiliary Input Relay Terminal Strip