Orion System VCM Component - Manual (Page 76)

Component & System Wiring 76
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OE331-21- AVG
GBD Device Wiring
OE255 or OE256
CO Sensor
(4-20mA Signal)
2
1. - Not Used
2. - Not Used
4. Relay Common
5. Relay Norm Closed
6. 4-20mA Output
3. Relay Norm Open
7. Signal Ground
8. 0-10V Output
Pin Designations
Pin Designations
1. AC+/DC+
2. AC/GND
Line
V
olt
age
Warning :
24 VAC Must Be Connected So That All Ground
Wires Remain Common. Failure To Do So Will
Result In Damage To The Controllers.
GBD Device
24VAC
24V
A
C
24VAC
GND
GND
GND
250 Ohm-1%
Resistor Supplied
With CO Sensor(s)
Must Be Wired
As Shown For
Each Sensor Used
2
Up to (6) CO Sensors Can
Be Used On The GBD.
AIN2, AIN3, AIN4,
2
They Can Be Wired
To AIN1,
AIN5 And AIN7 As
Desired. Only 4-20mA
CO Sensor(s) May Be
Used.
2
POWER
VR2
TB4
VR1
PJ3 PJ2
PJ1
EXPANSION
PRESSURE
T'STAT
SENSOR
C17 D15
C20 D17
D6
D7
D8
D9
D11
D14
C12
C10 0-5 VDC 0-1 VDC
JP1
X2
TB3
INPUTS
+VDC
AOUT1
AOUT2
AIN7
AIN5
AIN4
AIN3
AIN2
AIN1
RN5
C4
CX15
The Pullup Resistor For The Analog
Input That Each CO Sensor Is Connected
To Must Be Removed For Proper
Operation Of The GBD Device.
2
PU1
PU2
PU3
PU4
PU5
GND
GND
PU7
GND
OE331-21-AVG
GBD Device Wiring
When Used For CO Applications
2
2.) 24 VAC Must Be Connected
So That All Ground Wires
Remain Common.
Notes:
4.) All Wiring To Be In Accordance
With Local And National Electrical
Codes And Specifications.
3.) Set-up, Programming And
Monitoring Of The GBD Device
Requires The Use Of A Personal
Computer And Prism Software.
1.) The GBD Can Either Be Used
With CO2 Sensors Or Space
Temperature Sensors But Not
Both On The Same GBD Device.
Up to 2 GBD Devices Can Be
Located On Each Local Loop.
24 VAC Transformer
20VA Minimum
Typical Wiring
Shown For Input
AIN3. Wiring For
Other Inputs Is
Identical.
10/07/05
OE331-21-AVG-GBD-Wire1A.CDR
GBD Controller - CO2 Applications Wiring (Cont’d)