Standard I/O Board - Johnson Controls VSD II Series Installation Manual

Technical Information on Control Connections

Standard I/O Board

Terminal Signal
1 Reference output
2 Analog input, voltage or current
3 Analog input common (current)
4 Analog input, voltage or current
5 Analog input common (current)
6 24V auxiliary voltage
7 I/O ground
8 Digital input 1
9 Digital input 2
10 Digital input 3
11 Common A for DIN1–DIN6
12 24V auxiliary voltage
13 I/O ground
14 Digital input 4
15 Digital input 5
16 Digital input 6
17 Common A for DIN1–DIN6
18 Analog signal (+output)
19 Analog output common
30 24V auxiliary input voltage
A RS485
B RS485
Description
10V, 3%: Maximum current 10 mA
Analog input channel 1
0–10V (Ri 200 kohms)
=
4–20 mA (Ri 50 ohms)
= 2
Resolution 0.1%, accuracy ±1%
Selection V/mA with DIP switches
Short-circuit protected
Differential input if not connected to ground:
Allows ±20V differential mode voltage to GND
Analog input channel 2
Default:
4–20 mA (Ri 250 ohms)
=
0–10V (Ri 200 kohms)
=
Resolution 0.1%, accuracy ±1%
Selection V/mA with DIP switches
Short-circuit protected
Differential input if not connected to ground:
Allows 20 differential mode voltage to GND
24V, ±10%, maximum voltage ripple <100m Vrms,
maximum 250 mA
Dimensioning: Maximum 1000 mA/control unit
Short-circuit protected
Ground for reference and controls (connected
internally to frame earth through 1 mohms)
Positive or negative logic
Ri minimum 5 kohms
=
0–5V "0"
=
15–30V "1"
=
Digital inputs can be disconnected from ground
24V, ±10% maximum voltage ripple <100m Vrms,
maximum 250 mA
Dimensioning: Maximum 1000 mA/control unit
Short-circuit protected
Ground for reference and controls (connected
internally to frame earth through 1 mohms)
Positive or negative logic
Ri minimum 5 kohms
=
0–5V "0"
=
15–30V "1"
=
Digital inputs can be isolated from ground
Analog output channel 1, selection 0–20 mA,
load <500 ohms
Default:
0–20 mA
0–10V
Resolution 0.1%, accuracy ±2%
Selection V/mA with DIP switches
Short-circuit protected
Can be used as external power backup for the
control unit
Differential receiver/transmitter
Set bus terminal with DIP switches
VSD Series II LIT-12011772—October 2012 www.johnsoncontrols.com
Appendix A
41