208
ICC
11.5
Chillgard Monitor
11.5.1
Overview
The gateway supports the Chillgard Monitor protocol on its RS-485 port. This
protocol enables non-intrusive monitoring of gas concentration and alarm
information for MSA’s Chillgard LC, LE, and RT monitors, and Chemgard
monitor. Some notes of interest are:
•
No configuration necessary. Data is automatically mapped into the database
upon selection of the protocol. Refer to section 11.5.2 for more information.
•
Network characteristics are fixed at 19200 baud, 8 data bits, 1 start bit, 1
stop bit and no parity.
•
May be connected along with an MSA Remote Display module or Remote
Relay module.
•
Gas concentration values are automatically scaled to preserve all digits
shown on the display.
•
The gateway can be powered from the 12V supply on the Chillgard RT and
Chemgard monitors by connecting J14 terminals 1 (+12V) and 3 (GND) to
terminals “POWER” and “GND” of the gateway, respectively.
•
Connect the MSA equipment to the RS-485 port by using twisted-pair cable
connected as shown in Figure 55 and Figure 56. Connect the “+” (“RS-485
To Optional Relay Module” terminal block for LC and LE) or “+ / A” (J15
terminal 2 or 4 for RT and Chemgard) terminal of the MSA equipment to
terminal “A” of the gateway, the “-“ (“RS-485 To Optional Relay Module”
terminal block for LC and LE) or “- / B” (J15 terminal 1 or 3 for RT and
Chemgard) terminal to terminal “B”, and the ground terminal “G” (“RS-485 To
Optional Relay Module” terminal block for LC and LE) or “GND” (J14 terminal
3 for RT and Chemgard) terminal to terminal “GND”. Also install jumper
wires connecting terminal “A” to terminal “Y”, and terminal “B” to terminal “Z”
on the gateway.
