Owner manual

LR4 Four Channel Latching Relay Module

9. Firmware Update Procedure

FIGURE 7. Program Mode Jumper

The firmware on the LR4 can be updated by using a terminal program such as

Hyperterminal. The LR4 contains an internal female DB-9 connector to

facilitate an RS-232 connection.

Firmware updates should only be performed at an appropriate workstation with

static control procedures in place. Failure to follow the procedures may cause

damage to the device.

• Ensure that the LR4 is completely disconnected.

• Remove the cover of the LR4 by removing the two Philips screws.

• Locate the program mode jumper and move the jumper from Run to Prog

as shown in Figure 7.

• Connect the LR4 to power and ground only (make no other connections as

doing so may interfere with programming).

• Once power is applied, the status LED should remain on.

• Connect the computer to the RS-232 connector inside the LR4.

• Set up Hyperterminal or the communications program that is being used as

follows:

• Baud Rate: 38400

• Data Bits: 8

• Parity: None

• Stop Bits: 1

• Flow control: XON/XOFF

• 25-ms line delay (under ASCII setup)