Measurement Computing PointScan Road Map rev.2.0 - Manual (Page 9)

PointScan Road Map 878395 5
Step 2) Power up the PointScan Hardware
Up to 7 PointScan modules can be powered from one PointScan/443. However, the same is not true
for system startup. Plugging in a PointScan/443 that supports 5, 6, or 7 modules will most likely
result in a power-stall condition. If your system has 5 or more modules you will need to
employ one of the following methods to power up the entire system.
Method 1 - uses a power output switch:
(a) Ensure that the PointScan/443 is removed from its AC power supply.
(b) Place an on/off switch in the /443’s 24 VDC power output line.
(c) With the switch open [and up to 7 modules connected] supply AC power to the /443.
(d) After the /443 is powered, close the 24 VDC power output switch.
(e) Check the LEDs on the modules to verify their status is normal.
Method 2 - does not make use of a switch:
(a) Ensure that the PointScan/443 is removed from its AC power supply.
(b) Ensure that no more than 4 modules are connected to the system.
(c) Plug the /443 into its AC power supply.
(d) Check the LEDs on the modules to verify their status is normal.
(e) If applicable, connect the additional module(s) one at a time. Make sure that no more
than 7 modules will be connected to a single PointScan/443.
(f) Check the LEDs on the newly added modules to verify their status is normal.
Status LEDs are detailed in the PointScan hardware User’s Manuals.