SPYDER MODEL 7 VAV CONTROLLER  INSTALLATION INSTRUCTIONS
31-00475-01   18
Terminal Connections
All the terminals for this controller are removable.
Table 15  Terminal Connections
Terminal Label Description
Power 24 VAC
1 Earth ground (connected to building earth ground)
2 V0 Power supply voltage (connected to 24 V0)
3 ~ Power supply voltage (connected to 24 VAC~)
4 AC OUT 24 VAC~ output
5 SRIN SSR power input ((connected to AC OUT with a factory jumper)
DO
6 SR1 SSR1 output 
7 C Common
8 SR2 SSR2 output 
9 SR3 SSR3 output 
10 C Common
11 SR4 SSR4 output 
12 SR5 SSR5 output 
13 C Common
Sylk ™
14 WM1 Sylk™ bus
15 WM2 Sylk™ bus
RS485 
16 + RS-485 bus + (for Modbus only)
17 - RS-485 bus - (for Modbus only)
18 COM Common
UIO
19 IO1 Universal signal input / output 1
20 C Common
21 IO2 Universal signal input / output 2 
22 IO3 Universal signal input/output 3 
23 C Common
24 IO4 Universal signal input / output 4 
25 IO5 Universal signal input / output 5 
26 C Common
27 IO6 Universal signal input / output 6 
28 C Common
29 IO7 Universal signal input / output 7 
20 VDC OUT
30 C Common
31 20 VDC OUT 20 VDC power output
BACnet MSTP 
32 + +  (BACnet MSTP + only)
33 - -  (BACnet MSTP - only)
34 COM COM (BACnet MSTP common only)