Relay Board 1 - Johnson Controls VSD II Series Installation Manual

Appendix A

Relay Board 1

Terminal Signal
21 Relay output 1
22
23
24 Relay output 2
25
26
32 Relay output 3
33
Relay Board 2
Terminal Signal
21 Relay output 1
22
23
24 Relay output 2
25
26
28 Thermistor input
29
Notes
Relay board with two change-over contact (SPDT) relays and one relay with normally-open (NO or SPST) contact.
5.5 mm isolation between channels.
If 230 Vac is used as control voltage from the output relays, the control circuitry must be powered with a separate
isolation transformer to limit short circuit current and overvoltage spikes. This is to prevent welding on the relay
contacts. Refer to standard EN60204-1, section 7.2.9.
Relay board with two change-over contact (SPDT) relays and a PTC thermistor input. 5.5 mm isolation between
channels.
42 VSD Series II LIT-12011772—October 2012 www.johnsoncontrols.com
Description
Switching capacity 24 Vdc/8A
250 Vac/8A
125 Vdc/0.4A
Minimum switching load 5V/10 mA
Switching capacity 24 Vdc/8A
250 Vac/8A
125 Vdc/0.4A
Minimum switching load 5V/10 mA
Switching capacity 24 Vdc/8A
250 Vac/8A
125 Vdc/0.4A
Minimum switching load 5V/10 mA
Description
Switching capacity 24 Vdc/8A
250 Vac/8A
125 Vdc/0.4A
Minimum switching load 5V/10 mA
Switching capacity 24 Vdc/8A
250 Vac/8A
125 Vdc/0.4A
Minimum switching load 5V/10 mA
Rtrip = 4.7 kohms (PTC), measuring voltage 3.5V