RAD Data comm ASM-20 Strap Selection , Setting Internal Jumpers and Switches

ASM-20 Installation and Operation Manual Chapter 2. Installation and Setup
11/4/99 14:09 Electrical Installation 2-3
~230 VAC
-1A T 250V
DTE
X.21
Line Connector
Figure 2-2 ASM-20 - X.21 Rear Panel
Strap Selection Before connecting power to the unit, determine the required configuration
of ASM-20 and position the straps accordingly. The PCB strap locations of
Figure 2-3 correspond to the numbers listed under the "Strap Identity"
column in Table 2-1.
Warning
HIGH VOLTAGE
Only authorized and qualified service personnel should have access
inside the equipment.
Disconnect the ASM-20 power cable and leased line connections before
opening the top cover.
Setting Internal
Jumpers and
Switches
To set the jumpers and switches:
1. Disconnect the power cable.
2. Loosen the screws holding the bottom cover in place.
3. Remove the top cover.
4. Adjust the jumpers as required. See Table 2-1.
5. Replace the top cover and tighten the retaining screws.