PendoTECH PressureMAT PMAT2 - Page 9

PressureMAT User Guide
Revision 8
Page 9/48
CONNECTIONS:
The external connections to the back panel are as shown below.
1. POWER SUPPLY connected to the power inlet connector
2. The PRESSURE SENSOR INPUTS connected via a DB15 connector
3. The OUTPUT RELAY:
a. NORMALLY OPEN- wired to terminals S and T via supplied connector (will switch to
CLOSED position with alarm condition)
b. NORMALLY CLOSED- wired to terminals R and T via supplied connector (will
switch to OPEN position with alarm condition)
c. POWER REMOVED- OPEN (S and T position) is the condition for relay(s)
4. The 4-20mA ANALOG OUTPUTS are wired to terminals S and T via supplied connector as
shown
5. Serial Port- send data RS232 to be collected by an external device (such as a PC)
6. Auxiliary input- alternate power input connection for panel mounting
7. Tare (S model only)- external relay (dry contact) closure across pins will tare sensor to zero
External Cable Connections to Back Panel for Multi-channel Units
To Power Inlet Connector
___________________
Panel Connector
_____________________
DB15
Wire here
for
Normally
CLOSED
Wire here
for
Normally
OPEN