Setra System SRPM - Manual (Page 12)

12
1. V Out: 0 to 5, 0 to 10 VDC
2. C Out: 4 to 20 mA
3. Common
● ● ● ●
● ● ● ●
Receiver
(V)
+
–
Voltage Output
3.3.5 BACnet
BACnet hardware is implemented as isolated RS485. Wire to Connector
J2, labeled RS-485. Connect tx line to +(A), rx to –(B) and ground wires
to S. Connect Shields together with wire nut.
Hardware confi guration is done using a 5 position dip switch (S1) located
in the upper right hand section of the PCBA as well as through the touch
screen interface, see Section 4.4. and 4.9.
Position Function
1 MAC address enable
2 N/C Not Connected
3 Pull Up Resistor
4 Termination Resistor
5 Pull Down Resistor
Use a small fl at blade screwdriver or pen to push the switch to the right
to turn that function on, otherwise it is off.
There is a BACnet setup screen that is enabled by pushing position 1
switch to the “on” position. After confi guration the switch must be moved
to the “off” position.