Wiring of Viewing Head, Term Description

IRIS MODEL P522 APPLICATION MANUAL

one cycle regardless of the new set points, allowing channel changes “on the fly,” so to speak. If the new flame OFF set point is equal to or greater than the current signal count, then the flame relay will de-energize on the subsequent cycle.

The pair of terminals designated RMT METER (to the left of the CHAN SEL terminals) is for the remote meter connection. This output is a current-driven sig- nal that ranges from 0 to 20 mA for remote meters, and can be switched to a range of 4 to 20 mA for DCS (distributed control system) applications (refer to sec- tion 4-20mA REMOTE OUTPUT). Connect the terminal marked “positive” to the positive meter ter- minal. This current signal can be used with a volt meter by feeding the signal to a resistor connected to the ground. The voltage developed across the resis- tor will follow Ohm’s law V = IR.

be used to communicate with the P522, and the con- nections are made to the terminals marked +TX, - TX, +RX and -RX. The transmitting, twisted pair goes to the TX terminals, and the receiving, twisted pair goes to the RX terminals.

Note: the terms “transmit” and “receive” used here with respect to the P522 will be reversed with re- spect to the RS-232 connection on the host computer. Refer to later sections in this manual for a detailed description of the software and how it is to be used with the P522.

WIRING OF VIEWING HEAD

Wiring of the viewing head is made to the terminals on the lower right side of the P522. These terminals are described as follows:

TERM DESCRIPTION

For example: a 3-volt meter can be used with a resistor of 3/.02 = 150 ohms, which will result in a full-scale reading of 3 volts for a 20mA output.

The four terminals called +TX, -TX, +RX, and -RX (to the left of RMT METER terminals) are used for the serial communication link. The serial commu- nication is achieved by using ASCII character code transmission at 4800 or 9600 baud through the RS- 232 com ports on the host computer. The P522 uses RS-422 data transmission which is over two, twisted pairs that are differentially transmitted and received, allowing long wire runs to be used through noisy environments. An RS-232 to RS-422 converter must

+V	24 VDC power to viewing head
GND	Power Ground
SC	Self-check/shutter drive signal to
	viewing head
SIG	Flame signal from viewing head

SIG GND Signal ground

Figure 2 shows a four-conductor cable to the view- ing head. Note that the flame signal wire going to terminal SIG is shielded, and the shield is terminated at both ends of the cable SIG GND.

			P 52 2
		R ED	+24V DC
W IRING SIDE VIEW - CO VER REM OVED		+V	+24V DC
W IRING SIDE VIEW - CO VER REM OVED
		G R EE N	G N D
		G N D
		B LA CK	SH UT TER
		SC	D RIV E
			D RIV E
		SIG	G N D
		SIG
		G N D
	W H ITE
CO NNECT SHIELD	SH IELD	SIG	SIGN AL
	SH IELD

TO TERM 3	FIGURE 2 - WIRING OF VIEWING HEAD
USE SHRINK TUBING	FIGURE 2 - WIRING OF VIEWING HEAD

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P522 specifications

The IRIS P522 is a highly advanced smart device characterized by its cutting-edge features, technologies, and remarkable performance capabilities. Designed for seamless integration into both personal and professional environments, the P522 stands out as a versatile tool for various applications, ranging from productivity enhancement to entertainment.

One of the main features of the IRIS P522 is its state-of-the-art display technology. The device sports a high-resolution touchscreen that provides vibrant colors and sharp images, ensuring a remarkable visual experience. This impressive display is paired with an ultra-responsive multi-touch interface, allowing users to interact effortlessly with the device, facilitating increased efficiency in tasks such as data entry, navigation, and media consumption.

The performance of the IRIS P522 is powered by a robust processor and ample RAM, enabling it to handle multitasking with ease. This ensures that users can run multiple applications simultaneously without experiencing lags or slowdowns. Additionally, the device incorporates advanced cooling technologies, which help maintain optimal operating temperatures even during intensive use, ensuring reliability over extended periods.

Connectivity is another significant aspect of the IRIS P522. Equipped with the latest wireless technologies, including Wi-Fi 6 and Bluetooth 5.0, the device allows for lightning-fast data transfer rates and seamless connections to a variety of accessories. This makes it an ideal choice for professionals who require constant communication and quick access to cloud-based resources.

Security features are paramount in today's digital landscape, and the IRIS P522 does not disappoint. It includes biometric authentication options such as fingerprint recognition and facial recognition, providing users with a secure way to access their device and data. This focus on security is further reinforced by regular software updates that ensure protection against the latest threats.

Battery life is another highlight of the IRIS P522, with an energy-efficient design that offers extended usage without frequent recharges. This is particularly beneficial for users on the go, as it enables prolonged productivity without being tethered to a power supply.

In conclusion, the IRIS P522 is a remarkable device that harmoniously blends advanced features, powerful technology, and user-centric design. With its stunning display, high performance, effortless connectivity, robust security measures, and extended battery life, the P522 caters to the needs of users in various contexts, making it an indispensable addition to modern digital life.

WIRING OF VIEWING HEAD

TERM DESCRIPTION

SIG

SIG GND Signal ground

Figure 2 shows a four-conductor cable to the view- ing head. Note that the flame signal wire going to terminal SIG is shielded, and the shield is terminated at both ends of the cable SIG GND.

FIGURE 2 - WIRING OF VIEWING HEAD

P522 specifications