Johnson Controls VMA1400 Series Manual page 7

Mounting and Wiring VMA1400 Series Controllers Technical Bulletin
Table 1: Actuator VA Power Rating
Actuator
VA-8020
VA-8050
VA-7150
VA-7153
J Series Electric Zone Valve
VA-8022
VA-8052
VA-7152
VA-7200
VA-7203
VA-7202
GE RR-7 or Touchplate
VA-7450
VA-7452
VA-7040
VA-7310
VA-7312
VA-7010
M9104-AGA-2N
M9104-AGA-2
M9104-AGS-2N
M9104-GGA-2
M9104-GGC-2
* Do not schedule all lights on one transformer to turn on at the same time. The
current surge on the transformer could open the circuit breaker.
When using a single transformer to power multiple VMAs, use a wire
gauge large enough to handle the current and minimize the voltage
drop. The voltage drop depends on the current draw, wire gauge, and
wire length. On a fully loaded 100 VA transformer, a 120 VAC
primary draws only 0.8 amperes, while the 24 VAC secondary draws
4 amperes.
2
The standard 2.5 mm
limited to 27m (88 ft) with ten cooling-only VMAs, all at one end of
the cable. If the transformer is centered (Example 2 in Figure 1) with
five VMAs on the left and five VMAs on the right, the distance in
each direction can be increased. This is because both the current
and voltage drop are halved. In this example, both the left and the right
legs could be increased to 54m (176 ft) from the transformer
(50 VA from each leg), creating a 108m (352 ft) total length.
Type
Incremental
Incremental
Incremental
Incremental w/feedback
On/Off
Voltage (0 to 10 VDC)
Voltage (0 to 10 VDC)
Voltage (0 to 10 VDC)
Incremental
Incremental w/feedback
Voltage (0 to 10 VDC)
Lighting relay
Incremental
Voltage (0 to 10 VDC)
Thermal (DAO)
Incremental
Voltage (0 to 10 VDC)
On/Off
Incremental
Incremental w/conduit
Incremental w/DPT-2015
Proportional 0-10V
Proportional 0-10V
w/conduit
(14 AWG) cable (Example 1 in Figure 1) is
7
Power Rating
4 VA
6 VA
2.7 VA
2.7 VA
7 VA
4 VA
6 VA
4.7 VA
6.7 VA
6.7 VA
8.7 VA
42 VA for 50 ms *
2.5 VA
2.5 VA
3 VA
2 VA
2 VA
7 VA
3.4 VA
3.4 VA
3.4 VA
5 VA
5 VA